biochar - wikipedia, the free encyclopedia

7/26/2019 Biochar - Wikipedia, The Free Encyclopedia

1/11

A piece of biochar.

BiocharFrom Wikipedia, the free encyclopedia

Biocharis charcoal usedas a soil amendment. Like

most charcoal, biochar is made from biomass via

pyrolysis. Biochar is under investigation as an

approach to carbon sequestration to producenegative carbon dioxide emissions.[1]Biochar thus

has the potential to help mitigate climate change via

carbon sequestration.[2][3] Independently, biochar can

increase soil fertility of acidic soils (low pH soils),

increase agriculturalproductivity, and provide

protectionagainst some foliar and soil-borne

diseases.[4]Furthermore, biochar reduces pressure on

forests.[5]Biochar is a stable solid,rich in carbon,

and can endurein soil for thousands of years.[1]

Contents

1 History2 Production

2.1 Centralized, decentralized, and mobile systems2.2 Thermo-catalytic depolymerization

3 Uses3.1 Carbon sink3.2 Soil amendment3.3 Slash-and-char3.4 Water retention3.5 Energy production: Bio-oil and Syngas

4 Direct and indirect benefits5 Research6 Emerging commercial sector7 See also8 Notes

9 References10 External links

History

Pre-Columbian Amazonians are believed to have used biochar to enhance soil productivity. They

produced it by smoldering agricultural waste (i.e., covering burning biomass with soil)[6]in pits or

trenches.[7]European settlers called it terra preta de Indio.[8]Following observations and experiments, a

research team working in French Guiana hypothesized that the Amazonian earthwormPontoscolex

corethruruswas the main agent of fine powdering and incorporation of charcoal debris to the mineral

soil.[9]
https://en.wikipedia.org/wiki/French_Guianahttps://en.wikipedia.org/wiki/Terra_pretahttps://en.wikipedia.org/wiki/Smolderhttps://en.wikipedia.org/wiki/Pre-Columbian_erahttps://en.wikipedia.org/wiki/Amazon_rainforesthttps://en.wikipedia.org/wiki/File:Biochar.jpghttps://en.wikipedia.org/wiki/Fertility_(soil)https://en.wikipedia.org/wiki/Acidic_soilhttps://en.wikipedia.org/wiki/Climate_changehttps://en.wikipedia.org/wiki/Negative_carbon_dioxide_emissionhttps://en.wikipedia.org/wiki/Carbon_sequestrationhttps://en.wikipedia.org/wiki/Pyrolysishttps://en.wikipedia.org/wiki/Earthwormhttps://en.wikipedia.org/wiki/French_Guianahttps://en.wikipedia.org/wiki/Terra_pretahttps://en.wikipedia.org/wiki/Smolderhttps://en.wikipedia.org/wiki/Amazon_rainforesthttps://en.wikipedia.org/wiki/Pre-Columbian_erahttps://en.wikipedia.org/wiki/Carbonhttps://en.wikipedia.org/wiki/Forestshttps://en.wikipedia.org/wiki/Acidic_soilhttps://en.wikipedia.org/wiki/Fertility_(soil)https://en.wikipedia.org/wiki/Climate_changehttps://en.wikipedia.org/wiki/Negative_carbon_dioxide_emissionhttps://en.wikipedia.org/wiki/Carbon_sequestrationhttps://en.wikipedia.org/wiki/Pyrolysishttps://en.wikipedia.org/wiki/Biomasshttps://en.wikipedia.org/wiki/Soil_conditionerhttps://en.wikipedia.org/wiki/Charcoalhttps://en.wikipedia.org/wiki/File:Biochar.jpg


2/11

The term biochar was coined by Peter Read to describe charcoal used as a soil improvement.[10]

Production

Biochar is a high-carbon, fine-grained residue that today is produced through modern pyrolysis

processes, which is the direct thermal decomposition of biomass in the absence of oxygen, which

prevents combustion, to obtain an array of solid (biochar), liquid (bio-oil), and gas (syngas) products.

The specific yield from the pyrolysis is dependent on process conditions. such as temperature, and can

be optimized to produce either energy or biochar.[11]Temperatures of 400500 C (752932 F) produce

more char, while temperatures above 700 C (1,292 F) favor the yield of liquid and gas fuel

components.[12]Pyrolysis occurs more quickly at the higher temperatures, typically requiring seconds

instead of hours. High temperature pyrolysis is also known as gasification, and produces primarily

syngas.[12]Typical yields are 60% bio-oil, 20% biochar, and 20% syngas. By comparison, slow pyrolysis

can produce substantially more char (~50%). Once initialized, both processes produce net energy. For

typical inputs, the energy required to run a fast pyrolyzer is approximately 15% of the energy that it

outputs.[13]Modern pyrolysis plants can use the syngas created by the pyrolysis process and output 39

times the amount of energy required to run.[7]

The Amazonian pit/trench method[7]harvests neither bio-oil nor syngas, and releases a large amount of

CO2, black carbon, and other greenhouse gases (GHG)s (and potentially, toxins) into the air.

Commercial-scale systems process agricultural waste, paper byproducts, and even municipal waste and

typically eliminate these side effects by capturing and using the liquid and gas products.

Centralized, decentralized, and mobile systems

In a centralized system, all biomass in a region is brought to a central plant for processing. Alternatively,

each farmer or group of farmers can operate a lower-tech kiln. Finally, a truck equipped with a pyrolyzer

can move from place to place to pyrolyze biomass. Vehicle power comes from the syngas stream, while

the biochar remains on the farm. The biofuel is sent to a refinery or storage site. Factors that influence

the choice of system type include the cost of transportation of the liquid and solid byproducts, the

amount of material to be processed, and the ability to feed directly into the power grid.

For crops that are not exclusively for biochar production, the residue-to-product ratio (RPR) and the

collection factor (CF) the percent of the residue not used for other things, measure the approximate

amount of feedstock that can be obtained for pyrolysis after harvesting the primary product. For

instance, Brazil harvests approximately 460 million tons (MT) of sugarcane annually,[14]with an RPR of

0.30, and a CF of 0.70 for the sugarcane tops, which normally are burned in the field.[15]This translates

into approximately 100 MT of residue annually, which could be pyrolyzed to create energy and soil

additives. Adding in the bagasse (sugarcane waste) (RPR=0.29 CF=1.0), which is otherwise burned

(inefficiently) in boilers, raises the total to 230 MT of pyrolysis feedstock. Some plant residue, however,

must remain on the soil to avoid increased costs and emissions from nitrogen fertilizers.[16]

Pyrolysis technologies for processing loose and leafy biomass produce both biochar and syngas.[17]

Thermo-catalytic depolymerization

Alternatively, "thermo-catalytic depolymerization", which utilizes microwaves, has recently been used to

efficiently convert organic matter to biochar on an industrial scale, producing ~50% char.[18][19]
https://en.wikipedia.org/wiki/Dielectric_heatinghttps://en.wikipedia.org/wiki/Bagassehttps://en.wikipedia.org/wiki/Sugarcanehttps://en.wikipedia.org/wiki/Brazilhttps://en.wikipedia.org/wiki/Biofuelhttps://en.wikipedia.org/wiki/Syngashttps://en.wikipedia.org/wiki/Kilnhttps://en.wikipedia.org/wiki/Toxinhttps://en.wikipedia.org/wiki/Greenhouse_gashttps://en.wikipedia.org/wiki/Black_carbonhttps://en.wikipedia.org/wiki/Bio-oilhttps://en.wikipedia.org/wiki/Syngashttps://en.wikipedia.org/wiki/Gasificationhttps://en.wikipedia.org/wiki/Charhttps://en.wikipedia.org/wiki/Syngashttps://en.wikipedia.org/wiki/Pyrolysis_oilhttps://en.wikipedia.org/wiki/Combustionhttps://en.wikipedia.org/wiki/Oxygenhttps://en.wikipedia.org/wiki/Thermal_decompositionhttps://en.wikipedia.org/wiki/Pyrolysis


3/11

Uses

Carbon sink

The burning and natural decomposition of biomass and in particular agricultural waste adds large

amounts of CO2to the atmosphere. Biochar that is stable, fixed, and 'recalcitrant' carbon can store large

amounts of greenhouse gases in the ground for centuries, potentially reducing or stalling the growth in

atmospheric greenhouse gas levels at the same time its presence in the earth can improve water quality,

increase soil fertility, raise agricultural productivity, and reduce pressure on old-growth forests.[20]

Biochar can sequester carbon in the soil for hundreds to thousands of years, like coal.[21][22][23][24][25]

Such a carbon-negative technology would lead to a net withdrawal of CO2from the atmosphere, while

producing and consuming energy. This technique is advocated by prominent scientists such as James

Hansen, head of the NASA Goddard Institute for Space Studies,[26]and James Lovelock, creator of the

Gaia hypothesis, for mitigation of global warming by greenhouse gas remediation.[27]

Researchers have estimated that sustainable use of biocharring could reduce the global net emissions of

carbon dioxide (CO2), methane, and nitrous oxide by up to 1.8Pg CO2-C equivalent (CO2-Ce) per year

(12% of current anthropogenic CO2-Ce emissions 1Pg=1Gt), and total net emissions over the course of

the next century by 130Pg CO2-Ce, without endangering food security, habitat, or soil conservation.[28]

Soil amendment

Biochar is recognised as offering a number of benefits for soil health. Many benefits are related to the

extremely porous nature of biochar. This structure is found to be very effective at retaining both waterand water-soluble nutrients. Soil biologist Elaine Ingham indicates[29]the extreme suitability of biochar

as a habitat for many beneficial soil micro organisms. She points out that when pre charged with these

beneficial organisms biochar becomes an extremely effective soil amendment promoting good soil, and

in turn plant, health.

Biochar has also been shown to reduce leaching ofE-colithrough sandy soils depending on application

rate, feedstock, pyrolysis temperature, soil moisture content, soil texture, and surface properties of the

bacteria.[30][31][32]

For plants that require high potash and elevated pH,[33]biochar can be used as a soil amendment to

improve yield.

Biochar can improve water quality, reduce soil emissions of greenhouse gases, reduce nutrient leaching,

reduce soil acidity, and reduce irrigation and fertilizer requirements.[34]Biochar was also found under

certain circumstances to induce plant systemic responses to foliar fungal diseases and to improve plant

responses to diseases caused by soilborne pathogens.[35][36][37]

The various impacts of biochar can be dependent on the properties of the biochar, [38]as well as the

amount applied,[37]and there is still a lack of knowledge about the important mechanisms andproperties.[39]Biochar impact may depend on regional conditions including soil type, soil condition
https://en.wikipedia.org/wiki/Fertilizerhttps://en.wikipedia.org/wiki/Irrigationhttps://en.wikipedia.org/wiki/Soil_acidityhttps://en.wikipedia.org/wiki/Leaching_(agriculture)https://en.wikipedia.org/wiki/Greenhouse_gaseshttps://en.wikipedia.org/wiki/Soil_conditionerhttps://en.wikipedia.org/wiki/PHhttps://en.wikipedia.org/wiki/Potashhttps://en.wikipedia.org/wiki/Escherichia_colihttps://en.wikipedia.org/wiki/Soil_biologyhttps://en.wikipedia.org/wiki/Elaine_Inghamhttps://en.wikipedia.org/wiki/Carbon_dioxide_equivalenthttps://en.wikipedia.org/wiki/Greenhouse_gas_remediationhttps://en.wikipedia.org/wiki/Mitigation_of_global_warminghttps://en.wikipedia.org/wiki/Gaia_hypothesishttps://en.wikipedia.org/wiki/James_Lovelockhttps://en.wikipedia.org/wiki/Goddard_Institute_for_Space_Studieshttps://en.wikipedia.org/wiki/James_Hansenhttps://en.wikipedia.org/wiki/Coalhttps://en.wikipedia.org/wiki/Old-growth_forest


4/11

(depleted or healthy), temperature, and humidity.[40]Modest additions of biochar to soil reduce nitrous

oxide N2O emissions by up to 80% and eliminate methane emissions, which are both more potent

greenhouse gases than CO2.[41]

Studies have reported positive effects from biochar on crop production in degraded and nutrientpoor

soils.[42]Biochar can be designed with specific qualities to target distinct properties of soils.[43]Biochar

reduces leaching of critical nutrients, creates a higher crop uptake of nutrients, and provides greater soil

availability of nutrients.[44]At 10% levels biochar reduced contaminant levels in plants by up to 80%,

while reducing total chlordane and DDX content in the plants by 68 and 79%, respectively. [45]On the

other hand, because of its high adsorption capacity, biochar may reduce the efficacy of soil applied

pesticides that are needed for weed and pest control.[46][47]High-surface-area biochars may be

particularly problematic in this regard more research into the long-term effects of biochar addition to

soil is needed.[46]

Slash-and-char

Switching fromslash-and-burntoslash-and-charfarming techniques in Brazil can decrease both

deforestation of the Amazon basin and carbon dioxide emission, as well as increase crop yields. Slash-

and-burn leaves only 3% of the carbon from the organic material in the soil.[48]

Slash-and-char can keep up to 50% of the carbon in a highly stable form.[49]Returning the biochar into

the soil rather than removing it all for energy production reduces the need for nitrogen fertilizers, thereby

reducing cost and emissions from fertilizer production and transport.[50]Additionally, by improving the

soil's ability to be tilled, fertility, and productivity, biocharenhanced soils can indefinitely sustain

agricultural production, whereas non-enriched soils quickly become depleted of nutrients, forcing

farmers to abandon the fields, producing a continuous slash and burn cycle and the continued loss of

tropical rainforest. Using pyrolysis to produce bio-energy also has the added benefit of not requiring

infrastructure changes the way processing biomass for cellulosic ethanol does. Additionally, the biochar

produced can be applied by the currently used machinery for tilling the soil or equipment used to apply

fertilizer.[51]

Water retention

Biochar is a desirable soil material in many locations due to its ability to attract and retain water. This is

possible because of its porous structure and high surface area.[52]As a result, nutrients, phosphorus, andagrochemicals are retained for the plants benefit. Plants therefore, are healthier and fertilizers leach less

into surface or groundwater.

Energy production: Bio-oil and Syngas

Mobile pyrolysis units can be used to lower the costs of transportation of the biomass if the biochar is

returned to the soil and the syngas stream is used to power the process.[53][54]Bio-oil contains organic

acids that are corrosive to steel containers, has a high water vapor content that is detrimental to ignition,

and, unless carefully cleaned, contains some biochar particles which can block injectors.[55]

If biochar is used for the production of energy rather than as a soil amendment, it can be directly

substituted for any application that uses coal. Pyrolysis also may be the most cost-effective way of

electricity generation from biomaterial.[56]
https://en.wikipedia.org/wiki/Electricity_generationhttps://en.wikipedia.org/wiki/Cellulosic_ethanolhttps://en.wikipedia.org/wiki/Tropical_rainforesthttps://en.wikipedia.org/wiki/Amazon_basinhttps://en.wikipedia.org/wiki/Slash-and-charhttps://en.wikipedia.org/wiki/Slash-and-burnhttps://en.wikipedia.org/wiki/Chlordanehttps://en.wikipedia.org/wiki/Methanehttps://en.wikipedia.org/wiki/Nitrous_oxide


5/11

Direct and indirect benefits

The pyrolysis of forest- or agriculture-derived biomass residue generates a biofuel withoutcompetition with crop production.Biochar is a pyrolysis byproduct that may be ploughed into soils in crop fields to enhance theirfertility and stability, and for medium- to long-term carbon sequestration in these soils.

Biochar enhances the natural process: the biosphere captures CO2, especially through plant

production, but only a small portion is stably sequestered for a relatively long time (soil, wood,etc.).Biomass production to obtain biofuels and biochar for carbon sequestration in the soil is a carbon-

negative process, i.e. more CO2is removed from the atmosphere than released, thus enabling

long-term sequestration.[57]

Research

Intensive research into manifold aspects involving the pyrolysis/biochar platform is underway around

the world. From 2005 to 2012, there were 1,038 articles that included the word biochar or bio-charin the topic that had been indexed in the ISI Web of Science. [58]Further research is in progress by such

diverse institutions around the world as Cornell University, the University of Edinburgh, which has a

dedicated research unit.,[59]and the Agricultural Research Organization (ARO) of Israel, Volcani Center,

where a network of researchers involved in biochar research (iBRN, Israel Biochar Researchers Network

(https://sites.google.com/site/ibrnisraelbiocharnetwork/)) was established as early as 2009.

Students at Stevens Institute of Technology in New Jersey are developing supercapacitors that use

electrodes made of biochar.[60]A process developed by University of Florida researchers that removes

phosphate from water, also yields methane gas usable as fuel and phosphate-laden carbon suitable for

enriching soil.[61]

Emerging commercial sector

Calculations suggest that emissions reductions can be 12 to 84% greater if biochar is put back into the

soil instead of being burned to offset fossil-fuel use. Thus biochar sequestration offers the chance to turn

bioenergy into a carbon-negative industry.[62]

Johannes Lehmann, of Cornell University, estimates that pyrolysis can be cost-effective for a

combination of sequestration and energy production when the cost of a CO 2ton reaches $37.[62]As of

mid-February 2010, CO2is trading at $16.82/ton on the European Climate Exchange (ECX), so using

pyrolysis for bioenergy production may be feasible even if it is more expensive than fossil fuel.

Current biochar projects make no significant impact on the overall global carbon budget, although

expansion of this technique has been advocated as a geoengineering approach.[63]In May 2009, the

Biochar Fund received a grant from the Congo Basin Forest Fund for a project in Central Africa to

simultaneously slow down deforestation, increase the food security of rural communities, provide

renewable energy and sequester carbon.

Application rates of 2.520 tonnes per hectare (1.08.1 t/acre) appear to be required to produce

significant improvements in plant yields. Biochar costs in developed countries vary from $300

7000/tonne, generally too high for the farmer/horticulturalist and prohibitive for low-input field crops. In
https://en.wikipedia.org/wiki/Renewable_energyhttps://en.wikipedia.org/wiki/Food_securityhttps://en.wikipedia.org/wiki/Deforestationhttps://en.wikipedia.org/wiki/Central_Africahttps://en.wikipedia.org/wiki/Climate_engineeringhttps://en.wikipedia.org/wiki/European_Climate_Exchangehttps://en.wikipedia.org/wiki/Emissions_tradinghttps://en.wikipedia.org/wiki/Methane_gashttps://en.wikipedia.org/wiki/Phosphatehttps://en.wikipedia.org/wiki/University_of_Floridahttps://en.wikipedia.org/wiki/Supercapacitorhttps://en.wikipedia.org/wiki/Stevens_Institute_of_Technologyhttps://sites.google.com/site/ibrnisraelbiocharnetwork/https://en.wikipedia.org/wiki/Volcani_Institute_of_Agricultural_Researchhttps://en.wikipedia.org/wiki/University_of_Edinburghhttps://en.wikipedia.org/wiki/Cornell_University


6/11

developing countries, constraints on agricultural biochar relate more to biomass availability andproduction time. An alternative is to use small amounts of biochar in lower cost biochar-fertilizer

complexes.[64]

Various companies in North America, Australia, and England sell biochar or biochar production units. In

England Carbon Gold supply a range of biochar-based soil improvers, composts and fertilisers for

arboriculture, horticulture and turfcare as well as to home growers. In Sweden the 'Stockholm Solution'

is an urban tree planting system that uses 30% biochar to support healthy growth of the urban forest. TheQatar Aspire Park now uses biochar to help trees cope with the intense heat of their summers.

At the 2009 International Biochar Conference, a mobile pyrolysis unit with a specified intake of 1,000

pounds (450 kg) was introduced for agricultural applications. The unit had a length of 12 feet and height

of 7 feet (3.6 m by 2.1m).[65]

A production unit in Dunlap, Tennessee by Mantria Corporation opened in August 2009 after testing and

an initial run, was later shut down as part of a Ponzi scheme investigation.[66]

See also

Activated carbonCharringPellet fuelSoil carbonSoil ecology

Notes

1. Lean, Geoffrey (7 December 2008). "Ancient skills 'could reverse global warming' ". The Independent.

Archived from the original on 13 September 2011. Retrieved 1 October 2011.

2. "Geoengineering the climate: science, governance and uncertainty". The Royal Society. 2009. Retrieved

22 August 2010.

3. Dominic Woolf, James E. Amonette, F. Alayne Street-Perrott, Johannes Lehmann, Stephen Joseph Amonette

Street-Perrott Lehmann Joseph (August 2010). "Sustainable biochar to mitigate global climate change".

Nature Communications1 (5): 19. Bibcode:2010NatCo...1E..56W. doi:10.1038/ncomms1053. ISSN 2041-

1723.

4. "Slash and Char". Retrieved 19 September 2014.

5. Benoit Anthony Ndameu (November 2011). "Biochar Fund Trials in Cameroon: Hype and UnfulfilledPromises" (PDF). Biofuelwatch. Retrieved 19 October 2012.

6. Solomon, Dawit, Johannes Lehmann, Janice Thies, Thorsten Schafer, Biqing Liang, James Kinyangi,

Eduardo Neves, James Petersen, Flavio Luizao, and Jan Skjemstad,Molecular signature and sources of

biochemical recalcitrance of organic carbone in Amazonian Dark Earths , 71 Geochemica et cosmochemica

ACTA 2285, 2286 (2007) ("Amazonian Dark Earths (ADE) are a unique type of soils apparently developed

between 500 and 9000 years B.P. through intense anthropogenic activities such as biomass-burning and high-

intensity nutrient depositions on pre-Columbian Amerindian settlements that transformed the original soils

into Fimic Anthrosols throughout the Brazilian Amazon Basin.") (internal citations omitted)

7. Lehmann 2007a, pp. 381387 To date, scientists have been unable to completely reproduce the beneficial

growth properties of terra preta. It is hypothesized that part of the alleged benefits of terra preta require the

biochar to be aged so that it increases the cation exchange capacity of the soil, among other possible effects. Infact, there is no evidence natives made biocahr for soil treatment, but really for transportable fuel charcoal.

Abandoned or forgotten charcoal pits left for centuries were eventually reclaimed by the forest. In that time

the harsh negative effects of the char (high pH, extreme ash content, salinity) had worn off and turned to

positive as the forest soil ecosystem saturated the charcoals with nutrients.supranote 2 at 386 ("Only aged
https://en.wikipedia.org/wiki/Biofuelwatchhttp://www.biofuelwatch.org.uk/wp-content/uploads/Biochar-Cameroon-report1.pdfhttp://www.biochar.org/joomla/index2.php?option=com_content&do_pdf=1&id=24https://www.worldcat.org/issn/2041-1723https://en.wikipedia.org/wiki/International_Standard_Serial_Numberhttps://dx.doi.org/10.1038%2Fncomms1053https://en.wikipedia.org/wiki/Digital_object_identifierhttp://adsabs.harvard.edu/abs/2010NatCo...1E..56Whttps://en.wikipedia.org/wiki/Bibcodehttps://en.wikipedia.org/wiki/The_Royal_Societyhttp://royalsociety.org/Geoengineering-the-climate/http://www.independent.co.uk/environment/climate-change/ancient-skills-could-reverse-global-warming-1055700.htmlhttps://en.wikipedia.org/wiki/The_Independenthttps://web.archive.org/web/20110913052413/http://www.independent.co.uk/environment/climate-change/ancient-skills-could-reverse-global-warming-1055700.htmlhttps://en.wikipedia.org/wiki/Soil_ecologyhttps://en.wikipedia.org/wiki/Soil_carbonhttps://en.wikipedia.org/wiki/Pellet_fuelhttps://en.wikipedia.org/wiki/Charringhttps://en.wikipedia.org/wiki/Activated_carbonhttps://en.wikipedia.org/wiki/Ponzi_schemehttps://en.wikipedia.org/wiki/Mantria_Corporation_Ponzi_schemehttps://en.wikipedia.org/wiki/Dunlap,_Tennesseehttps://en.wikipedia.org/wiki/Englandhttps://en.wikipedia.org/wiki/Australiahttps://en.wikipedia.org/wiki/North_America


7/11

biochar shows high cation retention, as in Amazonian Dark Earths. At high temperatures (3070C), cation

retention occurs within a few months. The production method that would attain high CEC in soil in cold

climates is not currently known.") (internal citations omitted).

8. Glaser, Lehmann & Zech 2002, pp. 219220 "These so-called Terra Preta do Indio (Terra Preta) characterize

the settlements of pre-Columbian Indios. In Terra Preta soils large amounts of black C indicate a high and

prolonged input of carbonized organic matter probably due to the production of charcoal in hearths, whereas

only low amounts of charcoal are added to soils as a result of forest fires and slash-and-burn techniques."

(internal citations omitted)

9. Jean-Franois Ponge, Stphanie Topoliantz, Sylvain Ballof, Jean-Pierre Rossi, Patrick Lavelle, Jean-MarieBetsch and Philippe Gaucher (2006). "Ingestion of charcoal by the Amazonian earthworm Pontoscolex

corethrurus: a potential for tropical soil fertility" (PDF). Soil Biology and Biochemistry38 (7): 20082009.

doi:10.1016/j.soilbio.2005.12.024.

10. Read, Peter (27 March 2009). "This gift of nature is the best way to save us from climate catastrophe.

Biochar schemes would remove carbon from the atmosphere and increase food supply, says Peter Read".

Guardian (London).

11. Gaunt & Lehmann 2008, pp. 4152, 4155 ("Assuming that the energy in syngas is converted to electricity with

an efficiency of 35%, the recovery in the life cycle energy balance ranges from 92 to 274 kg (203 to 604 lb)

CO2MW-1 of electricity generated where the pyrolysis process is optimized for energy and 120 to 360

kilograms (790 lb) CO2MW-1 where biochar is applied to land. This compares to emissions of 600900

kilograms (1,3002,000 lb) CO2MW-1 for fossil-fuel-based technologies.)12. Winsley, Peter (2007). "Biochar and bioenergy production for climate change mitigation". New Zealand

Science Review64. (See Table 1 for differences in output for Fast, Intermediate, Slow, and Gasification).

13. Laird 2008, pp. 100, 178181 "The energy required to operate a fast pyrolyzer is 15% of the total energy

that can be derived from the dry biomass. Modern systems are designed to use the syngas generated by the

pyrolyzer to provide all the energy needs of the pyrolyzer."

14. "Production Quantity Of Sugar Cane In Brazil In 2006". FAOSTAT. 2006. Retrieved 1 July 2008.

15. Perera, K.K.C.K., P.G. Rathnasiri, S.A.S. Senarath, A.G.T. Sugathapala, S.C. Bhattacharya, and P. Abdul

Salam,Assessment of sustainable energy potential of non-plantation biomass resources in SriLanka, 29

Biomass & Bioenergy 199, 204 (2005) (showing RPRs for numerous plants, describing method for

determining available agricultural waste for energy and char production).

16. Laird 2008, pp. 179 "Much of the current scientific debate on the harvesting of biomass for bioenergy isfocused on how much can be harvested without doing too much damage."

17. Jorapur, Rajeev Rajvanshi, Anil K. (1997). "Sugarcane leaf-bagasse gasifier for industrial heating

applications". Biomass and Bioenergy13 (3): 141. doi:10.1016/S0961-9534(97)00014-7.

18. Karagz, Selhan Bhaskar, Thallada Muto, Akinori Sakata, Yusaku Oshiki, Toshiyuki Kishimoto, Tamiya

(1 April 2005). "Low-temperature catalytic hydrothermal treatment of wood biomass: analysis of liquid

products". Chemical Engineering Journal108 (12): 127137. doi:10.1016/j.cej.2005.01.007. ISSN 1385-

8947. Retrieved 23 September 2011.

19. Jha, Alok (13 March 2009). " 'Biochar' goes industrial with giant microwaves to lock carbon in charcoal". The

Guardian. Retrieved 23 September 2011.

20. Laird 2008, pp. 100, 178181

21. Lehmann, Johannes. "Terra Preta de Indio". Soil Biochemistry (internal citations omitted). Not only dobiochar-enriched soils contain more carbon - 150gC/kg compared to 20-30gC/kg in surrounding soils - but

biochar-enriched soils are, on average, more than twice as deep as surrounding soils.

22. Lehmann 2007b "this sequestration can be taken a step further by heating the plant biomass without oxygen (a

process known as low-temperature pyrolysis)."

23. Lehmann 2007a, pp. 381, 385 "pyrolysis produces 39 times more energy than is invested in generating the

energy. At the same time, about half of the carbon can be sequestered in soil. The total carbon stored in these

soils can be one order of magnitude higher than adjacent soils.

24. Winsley, Peter (2007). "Biochar and Bioenergy Production for Climate Change Mitigation" (PDF).New

Zealand Science Review64 (5): 5.

25. Kern, Dirse C. (915 July 2006). "New Dark Earth Experiment in the Tailandia City Para-Brazil: The

Dream of Wim Sombroek". 18th World Congress of Soil Science.26. Hamilton, Tyler (22 June 2009). "Sole option is to adapt, climate author says". The Star (Toronto).

27. Vince 2009

28. "Sustainable biochar to mitigate global climate change". Nature Communications. 2010.

29. Ingham, Elaine with Elaine Ingham (http://www.needfire.info/home/interview-with-dr-elaine-ingham%7CInte
http://www.needfire.info/home/interview-with-dr-elaine-ingham%7CInterviewhttps://en.wikipedia.org/wiki/Nature_Communicationshttp://www.nature.com/ncomms/journal/v1/n5/full/ncomms1053.htmlhttp://www.thestar.com/sciencetech/article/654444https://en.wikipedia.org/wiki/New_Zealand_Science_Reviewhttp://www.biochar-international.org/images/NZSR64_1_Winsley.pdfhttp://www.css.cornell.edu/faculty/lehmann/research/terra%20preta/terrapretamain.htmlhttp://www.guardian.co.uk/environment/2009/mar/13/charcoal-carbonhttps://www.worldcat.org/issn/1385-8947https://en.wikipedia.org/wiki/International_Standard_Serial_Numberhttps://dx.doi.org/10.1016%2Fj.cej.2005.01.007https://en.wikipedia.org/wiki/Digital_object_identifierhttp://www.sciencedirect.com/science/article/pii/S1385894705000227https://dx.doi.org/10.1016%2FS0961-9534%2897%2900014-7https://en.wikipedia.org/wiki/Digital_object_identifierhttp://faostat.fao.org/site/567/DesktopDefault.aspx?PageID=567https://en.wikipedia.org/wiki/New_Zealand_Science_Reviewhttps://en.wikipedia.org/wiki/The_Guardianhttp://www.guardian.co.uk/commentisfree/2009/mar/27/biocharhttps://dx.doi.org/10.1016%2Fj.soilbio.2005.12.024https://en.wikipedia.org/wiki/Digital_object_identifierhttps://www.researchgate.net/publication/44735820


8/11

rview),(2015)

30. Bolster, C.H., and Abit, S.M. (2012) Biochar pyrolyzed at two temperatures affects Escherichia coli transport

through a sandy soil. Journal of Environmental Quality 41:124-133

31. Abit, S.M., Bolster, C.H., Cai, P., and Walker, S.L. (2012) Influence of feedstock and pyrolysis temperature

of biochar amendments on transport of Escherichia coli in saturated and unsaturated soil. Environmental

Science and Technology 46:8097-8105

32. Abit, S.M., Bolster, C.H., Cantrell, K.B., Flores, J.Q., and Walker, S.L. (2014) Transport of Escherichia

coli, Salmonella typhimurium, and microspheres in biochar-amended soils with different textures. Journal of

Environmental Quality 43:371-37833. Lehmann, Johannes, and Jose Pereira da Silva Jr., Christoph Steiner, Thomas Nehls, Wolfgang Zech, &

Bruno Glaser,Nutrient availability and leaching in an archaeological Anthrosol and a Ferralsol of the

Central Amazon basin: fertilizer, manure and charcoal amendments, 249 Plant & Soil 343, 355 (2003)

34. Supranote 6 Day, Danny, Robert J. Evans, James W. Lee, and Don Reicosky,Economical CO2, SOx, and N

x capture from fossil-fuel utilization with combined renewable hydrogen production and large-scale carbon

sequestration, 30 Energy 2558, 2560

35. Elad, Y., Rav David, D., Meller Harel, Y., Borenshtein, M. , Kalifa Hananel, B., Silber, A., and Graber, E.R.

(2010) Induction of systemic resistance in plants by biochar, a soil-applied carbon sequestering agent.

Phytopathology 100, 913-921

36. Meller Harel, Y., Elad, Y., Rav David, D., Borenstein, M., Schulcani, R., Lew, B., Graber, E.R. (2012)

Biochar mediates systemic response of strawberry to foliar fungal pathogens. Plant and Soil, 357:245-25737. Jaiswal, A.K., Elad, Y., Graber, E.R., Frenkel, O. (2014). Rhizoctonia solani suppression and plant growth

promotion in cucumber as affected by biochar pyrolysis temperature, feedstock and concentration. Soil

Biology and Biochemistry, 69: 110-118

38. Silber, A., Levkovitch, I., Graber, E. R. (2010) pH-dependent mineral release and surface properties of

cornstraw biochar: Agronomic implications. Environmental Science & Technology 44: 9318-9323

39. Glaser, Lehmann & Zech 2002, pp. 224 note 7 "Three main factors influence the properties of charcoal: (1)

the type of organic matter used for charring, (2) the charring environment (e.g. temperature, air), and (3)

additions during the charring process. The source of charcoal material strongly influences the direct effects of

charcoal amendments on nutrient contents and availability."

40. Dr. Wardle points out that plant growth has been observed in tropical (depleted) soils by referencing

Lehmann, but that in the boreal (high native soil organic matter content) forest this experiment was run in, itaccelerated the native soil organic matter loss. Wardle,supra note 18. ("Although several studies have

recognized the potential of black C for enhancing ecosystem carbone sequestration, our results show that these

effects can be partially offset by its capacity to stimulate loss of native soil C, at least for boreal forests.")

(internal citations omitted) (emphasis added).

41. Lehmann 2007a, pp. note 3 at 384 "In greenhouse experiments, NOxemissions were reduced by 80% and

methane emissions were completely suppressed with biochar additions of 20 g kg-1 (2%) to a forage grass

stand."

42. "Biochar fact sheet".

43. Novak, Jeff. Development of Designer Biochar to Remediate Specific Chemical and Physical Aspects of

Degraded Soils. Proc. of North American Biochar Conference 2009, University of Colorado at Boulder.

Florence: U.S. Department of Agriculture, 2009. 1-16. Print44. Julie, Major, Johannes Lehmann, Macro Rondon, and Susan J. Riha. Nutrient Leaching below the Rooting

Zone Is Reduced by Biochar, the Hydrology of a Columbian Savanna Oxisol Is Unaffected. Proc. of North

American Biochar Conference 2009, University of Colorado at Boulder. Ithaca: Cornell University

Department of Crop and Soil Sciences, 2009. Print.

45. Elmer, Wade, Jason C. White, and Joseph J. Pignatello. Impact of Biochar Addition to Soil on the

Bioavailability of Chemicals Important in Agriculture. Rep. New Haven: University of Connecticut, 2009.

Print.

46. Graber, E.R., Tsechansky, L., Gerstl, Z., Lew, B. (2011) High surface area biochar negatively impacts

herbicide efficacy. Plant and Soil, 353:95-106

47. Graber, E.R., Tsechansky, L., Khanukov, J., Oka, Y. (2011) Sorption, volatilization and efficacy of the

fumigant 1,3-dichloropropene in a biochar-amended soil. Soil Science Society of America Journal. 75(4)1365-1373

48. Glaser, Lehmann & Zech 2002, pp. note 7 at 225 "The published data average at about 3% charcoal formation

of the original biomass C."

49.Biochar Sequestration In Terrestrial Ecosystems A Review, by Johannes Lehmann, John Gaunt, and Marco
http://www.csiro.au/resources/Biochar-Factsheet.htmlhttps://en.wikipedia.org/wiki/Organic_matterhttp://www.needfire.info/home/interview-with-dr-elaine-ingham%7CInterview


9/11

References

Badger, Phillip C. Fransham, Peter (2006). "Use of mobile fast pyrolysis plants to densifybiomass and reduce biomass handling costsA preliminary assessment".Biomass & Bioenergy30.

Biederman, Lori A. W. Stanley Harpole (2011). "Biochar and Managed Perennial Ecosystems".Iowa State Research Farm Progress Reports. Retrieved February 12, 2013.Brewer, Catherine (2012).Biochar Characterization and Engineering(dissertation). Iowa State

University. Retrieved February 12, 2013.Gaunt, John L. Lehmann, Johannes (2008). "Energy Balance and Emissions Associated withBiochar Sequestration and pyrolysis Bioenergy Production".Environmental Sciences &Technologies42(11): 4152. Bibcode:2008EnST...42.4152G. doi:10.1021/es071361i.

Rondon. Mitigation and Adaptation Strategies for Global change 403, 404 (2006).supranote 11 at 407 ("If

this woody above ground biomass were converted into biochar by means of simple kiln techniques and applied

to soil, more than 50% of this carbon would be sequestered in a highly stable form.")

50. Gaunt & Lehmann 2008, pp. 4152 note 3 ("This results in increased crop yields in low-input agriculture and

increased crop yield per unit of fertilizer applied (fertilizer efficiency) in high-input agriculture as well as

reductions in off-site effects such as runoff, erosion, and gaseous losses.")

51. Lehmann 2007b, pp. note 9 at 143 "It can be mixed with manures or fertilizers and included in no-tillage

methods, without the need for additional equipment."

52. Terra Pretas: Charcoal Amendments Influence on Relict Soils and Modern Agriculture (https://www.agronomy.org/files/students/2010-ricigliano-entry.pdf)

53. Badger & Fransham 2006, pp. 322

54. Michael Jacobson, Cedric Briens and Franco Berruti, "Lift tube technology for increasing heat transfer in an

annular pyrolysis reactor", CFB9, Hamburg, Germany, 1316 May 2008.

55. Yaman, Serdar,pyrolysis of biomass to produce fuels and chemical feedstocks, 45 Energy Conversion &

MGMT 651, 659 (2003).

56. Bridgwater, A. V., A.J. Toft, and J.G. Brammer,A techno-economic comparison of power production by

biomass fast pyrolysis with gasification and combustion, 6 Renewable & Sustainable Energy Rev. 181, 231

("the fast pyrolysis and diesel engine system is clearly the most economic of the novel systems at scales up to

15 MWe")

57. Cornet A., Escadafal R., 2009. Is biochar "green"? CSFD Viewpoint. Montpellier, France. 8 pp.58. Verheijen, F.G.A., Graber, E.R., Ameloot, N., Bastos, A.C., Sohi, S. and Knicker, H. 2014. Biochars in

soils: new insights and emerging research needs. Eur. J. Soil Science, 65: 22-27. DOI: 10.1111/ejss.12127.

59. "Can Biochar save the planet?". University of Edinburgh. Retrieved 10 March 2009.

60. "A Cheaper, Greener Material for Supercapacitors". Stevens Institute of Technology. 2011. Retrieved 25 May

2011.

61. "Biochar" More Effective, Cheaper at Removing Phosphate from Water". University of Florida. 2011.

Retrieved 18 May 2011.

62. Lehmann 2007b, pp. 143, 144.

63. Ananthaswamy, Anil,Microwave factory to act as carbon sink, NEW SCIENTIST, 1 October (2008)

("Retrieved on 12 December 2008) (http://www.newscientist.com/article/dn14851)

Biochar: Is the hype justified? (http://news.bbc.co.uk/2/hi/science/nature/7924373.stm) By Roger Harrabin -Environment analyst, (09:20 GMT, Monday, 16 March 2009) BBC News

64. Joseph, S., Graber, E.R., Chia, C., Munroe, P., Donne, S., Thomas, T., Nielsen, S., Marjo, C., Rutlidge, H.,

Pan, GX., Li, L., Taylor, P., Rawal, A., Hook, J. (2013). Shifting Paradigms on Biochar: Micro/Nano-

structures and Soluble Components are Responsible for its Plant-Growth Promoting Ability. Carbon

Management 4:323-343

65. Austin, Anna (October 2009). "A New Climate Change Mitigation Tool".Biomass Magazine (BBI

International). Retrieved 30 October 2009.

66. Blumenthal, Jeff (17 November 2009). "Wragg, Knorr ordered to halt Mantria operations". Philadelphia

Business Journal.
https://en.wikipedia.org/wiki/Philadelphia_Business_Journalhttp://philadelphia.bizjournals.com/philadelphia/stories/2009/11/16/daily25.htmlhttp://www.biomassmagazine.com/article.jsp?article_id=3091&q=&page=allhttp://news.bbc.co.uk/2/hi/science/nature/7924373.stmhttp://www.newscientist.com/article/dn14851https://en.wikipedia.org/wiki/University_of_Floridahttp://eponline.com/articles/2011/05/18/biochar-more-effective-cheaper-at-removing-phosphate-from-water.aspxhttps://en.wikipedia.org/wiki/Stevens_Institute_of_Technologyhttp://www.solarnovus.com/index.php?option=com_content&view=article&id=2859:a-cheaper-greener-material-for-supercapacitors&catid=52:applications-tech-research&Itemid=247http://www.cnn.com/video/#/video/tech/2009/03/30/ansari.biochar.cnnhttps://www.agronomy.org/files/students/2010-ricigliano-entry.pdfhttps://dx.doi.org/10.1021%2Fes071361ihttps://en.wikipedia.org/wiki/Digital_object_identifierhttp://adsabs.harvard.edu/abs/2008EnST...42.4152Ghttps://en.wikipedia.org/wiki/Bibcodehttp://lib.dr.iastate.edu/etd/12284/http://lib.dr.iastate.edu/farms_reports/136/


10/11

Glaser, Bruno Lehmann, Johannes Zech, Wolfgang (2002). "Ameliorating physical and chemicalproperties of highly weathered soils in the tropics with charcoal a review".Biology and Fertilityof Soils35.

Laird, David A. (2008). "The Charcoal Vision: A WinWinWin Scenario for SimultaneouslyProducing Bioenergy, Permanently Sequestering Carbon, while Improving Soil and WaterQuality".Journal of Agronomy.

Lehmann, Johannes (2007a). "Bio-energy in the black" (PDF).Front Ecol Environ5(7). Retrieved1 October 2011.

Lehmann, Johannes (2007b). "A handful of carbon".Nature447(7141).Bibcode:2007Natur.447..143L. doi:10.1038/447143a. Retrieved 11 January 2008.

Lehmann, J. Gaunt, John Rondon, Marco et al. (2006). "Bio-char Sequestration in TerrestrialEcosystems A Review" (PDF).Mitigation and Adaptation Strategies for Global Change11(2):395427. doi:10.1007/s11027-005-9006-5.

Nakka, S. B. R. (2011) "Sustainability of biochar systems in developing countries" (http://www.biochar-international.org/Sustainability_Biochar_Systems_DevelopingCountries), Published in IBIVince, Gaia (3 January 2009). "One last chance to save mankind" (2692). New Scientist.

Woolf, Dominic, James E. Amonette, F. Alayne Street-Perrott, Johannes Lehmann, and StephenJoseph. (2010). "Sustainable biochar to mitigate global climate change,"Nature Communications1(5): 1-9. Available: http://www.nature.com/ncomms/journal/v1/n5/pdf/ncomms1053.pdf.Graber, E.R. and Elad, Y. (2013) Biochar Impact on Plant Resistance to Disease. Chapter 2, InBiochar and Soil Biota, Ed. Natalia Ladygina, CRC Press, Boca Raton, Florida, pp. 4168Ameloot, N., Graber, E.R., Verheijen, F., De Neve, S. (2013). Effect of soil organisms on biocharstability in soil: Review and research needs. Eur. J. Soil Science, 64: 379-390Jeffery, S., Verheijen, F.G.A., van der Velde, M., Bastos, A.C. 2011. A quantitative review of the

effects of biochar application to soils on crop productivity using meta-analysis. Agriculture,Ecosystems and the Environment, v. 144: 175-187

External links

International Biochar Initiative (http://www.biochar-international.org)European Biochar Foundation and Certificate (http://www.european-biochar.org)Biochar Fund (http://www.biocharfund.org/)Biochar Research at Cornell University (http://www.css.cornell.edu/faculty/lehmann/index.html)Biochar.org (http://www.biochar.org)Biochar News (http://www.biochar.net)Biochar India (http://www.biocharindia.com)The Big Biochar Experiment (UK) (http://www.bigbiocharexperiment.co.uk)Israel Biochar Research Network (https://sites.google.com/site/ibrnisraelbiocharnetwork)Agricultural Geo-Engineering Past, Present & Future (https://www.soils.org/files/am/ecosystems/kinght.pdf)

Retrieved from "https://en.wikipedia.org/w/index.php?title=Biochar&oldid=716353473"

Categories: Charcoal Environmental soil science Soil improvers Wildfire ecology

This page was last modified on 21 April 2016, at 07:40.Text is available under the Creative Commons Attribution-ShareAlike License additional terms
https://en.wikipedia.org/wiki/Wikipedia:Text_of_Creative_Commons_Attribution-ShareAlike_3.0_Unported_Licensehttps://en.wikipedia.org/wiki/Category:Wildfire_ecologyhttps://en.wikipedia.org/wiki/Category:Soil_improvershttps://en.wikipedia.org/wiki/Category:Environmental_soil_sciencehttps://en.wikipedia.org/wiki/Category:Charcoalhttps://en.wikipedia.org/wiki/Help:Categoryhttps://en.wikipedia.org/w/index.php?title=Biochar&oldid=716353473https://www.soils.org/files/am/ecosystems/kinght.pdfhttps://sites.google.com/site/ibrnisraelbiocharnetworkhttp://www.bigbiocharexperiment.co.uk/http://www.biocharindia.com/http://www.biochar.net/http://www.biochar.org/http://www.css.cornell.edu/faculty/lehmann/index.htmlhttp://www.biocharfund.org/http://www.european-biochar.org/http://www.biochar-international.org/http://www.nature.com/ncomms/journal/v1/n5/pdf/ncomms1053.pdfhttps://en.wikipedia.org/wiki/New_Scientisthttp://www.newscientist.com/article/mg20126921.500-one-last-chance-to-save-mankind.html?full=truehttp://www.biochar-international.org/Sustainability_Biochar_Systems_DevelopingCountrieshttps://dx.doi.org/10.1007%2Fs11027-005-9006-5https://en.wikipedia.org/wiki/Digital_object_identifierhttp://www.garnautreview.org.au/CA25734E0016A131/WebObj/d07119990GeneralSubmission-DepartmentofAgricultureandFoodWA-Lehmann__2006_char_review/$File/d07%20119990%20General%20Submission%20-%20Department%20of%20Agriculture%20and%20Food%20WA%20%20-%20Lehmann__2006_char_review.pdfhttps://dx.doi.org/10.1038%2F447143ahttps://en.wikipedia.org/wiki/Digital_object_identifierhttp://adsabs.harvard.edu/abs/2007Natur.447..143Lhttps://en.wikipedia.org/wiki/Bibcodehttps://en.wikipedia.org/wiki/Nature_(journal)http://www.nature.com/nature/journal/v447/n7141/full/447143a.htmlhttp://www.css.cornell.edu/faculty/lehmann/publ/FrontiersEcolEnv%205,%20381-387,%202007%20Lehmann.pdfhttp://agron.scijournals.org/cgi/content/full/100/1/178


11/11

may apply. By using this site, you agree to the Terms of Use and Privacy Policy. Wikipedia is aregistered trademark of the Wikimedia Foundation, Inc., a non-profit organization.
https://www.wikimediafoundation.org/https://wikimediafoundation.org/wiki/Privacy_policyhttps://wikimediafoundation.org/wiki/Terms_of_Use

biochar - wikipedia, the free encyclopedia

Documents