material and equipment for water purification from lead g.v. medyak, v.i. sokolova, a.a. shunkevich,...

MATERIAL AND EQUIPMENT FOR WATER PURIFICATION FROM LEAD

G.V. Medyak, V.I. Sokolova, A.A. Shunkevich, A.V. Bildyukevich*, V.P. Sokol, A.P. Polikarpov

NATIONAL ACADEMY OF SCIENCESOF BELARUS

INSTITUTE OF PHYSICAL ORGANIC CHEMISTRY

The pollution of water resources by lead compounds is a serious ecological problem, especially in industrially developed regions.

Commonly, the level of total lead content in atmospheric precipitations usually ranges from 1 to 50 μg/l, but in areas with intensive industry can reach up to 1 000 μg /l.

Increasing of lead concentration in underground water is causing serious problems concerning drinking water supply in some locations in Middle Asia.

Exceeding of the MPC of lead in drinking water (10 μg/l ) in Canada, Europe and some regions of Russian Federation is fixed

PROBLEM:

ADVANTAGES:

Comparison of the ordinary granular and fibrous ion

exchangers

high speed of ion exchange, sorption and catalytic processes

possibility to use thin (2-6 cm) filtering layers high flow rate high chemical resistance and osmotic stability possibility of multiple regenerations

CHEMICALY ACTIVE TEXTILE MATERIALS

APPLICATIONS:

AIR PURIFICATION FROM TOXIC IMPURITIES IN INDUSTRY AND AGRICULTURE

SUPERFINE AIR PURIFICATION IN ELECTRONICS INDIVIDUAL PROTECTIVE MEANS FOR HUMANS SKIN AND LUNGS WATER PURIFICATION FROM HEAVY METALS, NITRATES, ARSENIC,

ACIDS DRINKING WATER PRODUCTION

THE AIM OF THE RESEARCH IS TO OFFER THE TECHNOLOGY AND INSTALLATIONS FOR FINE PURIFICATION OF DRINKING WATER FROM LEAD

THE NEW APPROACH FOR FINE PURIFICATION OF DRINKING WATER FROM LEAD IS OFFERED. IT CONSISTS IN APPLICATION OF FIBROUS CATION EXCHANGER FIBAN X-1

Cartridges made from FIBAN X-1 yarn

CHARACTERISTICS OF THE ION EXCHANGERS USED IN THIS WORK

Label of the ion exchanger

Functional groups

Capacity, m.eqv/g

СООН NR2

FIBAN Х-1fibrous

N(CH2COOH)2

СООН6,5 0,6

ANKB-35granular

N(CH2COOH)2 4,6 0,5

Breakthrough curves for FIBAN X-1(A) and ANKB-35 (B) ion exchangers. 1 - Co2+, 2 - Ni2+, 3 - Zn2+, 4 - Cd2+, 5 - Cu2+, 6 - Pb2+

0

0,2

0,4

0,6

0,8

1

1,2

1,4

0 2 4 6 8 10 12

1

4

23

5

6

0

0,2

0,4

0,6

0,8

1

1,2

1,4

0 2 4 6 8 10 12

2

3

1

5

4

6

C/C0C/C0

BV10-3 BV10-3

Model solution: 410-5 eq/l of Cu2+, Ni2+, Co2+, Zn2+, Cd2+, Pb2+ on the background of 4 10-3 eq/l of Ca2+.

Filtration rate is 9.5 cm/min (190 BV/h); pH = 6;

A B

Ionexchanger

Dynamic capacity up to breakthrough, meqv/g

Cu2+ Pb2+ Co2+ Ni2+ Cd2+ Zn2+

FIBAN X-1 0,77 1,05 0,19 0,28 0,23 0,17

ANKB-35 0 0 0 0 0 0

Full dynamic capacities, meqv/g

FIBAN X-1 1,59 1,79 0,02 0,23 0,30 0,06

ANKB-35 0,77 0,63 0,23 0,35 0,22 0,27

DYNAMIC CAPACITIES UP TO BREAKTHROUGH (CME = 0.05 MG/L) AND FULL DYNAMIC CAPACITIES OF ION EXCHANGERS ACCORDING TO HEAVY METAL IONS

PURIFICATION OF WATER FROM LEAD USING 10 CARTRIDGE MADE FROM FIBAN X-1 YARN

Parameter Unit Value

Temperature 0C 12-14

pH pH 8.0

Alcalinity meqv/l 3.7

Calcium mg/l 59

Magnesium mg/l 15

COD mg O/l 0.5

Iron mg/l 0.11

Zink μg/l 12

Alumina μg/l 9

Silica mg/l 4

Lead μg/l 19-60

COMPOSITION OF FEED WATER

RESULTS OF WATER PURIFICATION

AT DIFFERENT FLOW RATES

Flow rate,

l/h

Рb, μg/lDegree of

purification,%

Feed water Filtrate

400 27,4 1,7 93,8

800 26,0-28,02,6 - 3,7 85,8- 90,7

1200 20.1-25.1 2.7 – 3.5 86,1- 86.6

1600 19,6 2,5 87,2

BREAKTHROUGH CURVE OF LEAD IONS AT FLOW RATE 1000 ± 50 ltr/h

0

2

4

6

8

10

12

14

16

0 5 10 15 20 25 30 35 40

CPb, μg/l

V, m3

PURIFICATION OF WATER FROM LEAD USING 10 CARTRIDGE MADE FROM FIBAN X-1 YARN

Concentration of Pb in feed - 60 μg/l

Based on the results of this study one- and multicartridge filters for water purification from lead were designed. Filters include either disposable ones for domestic application or industrial installations with automatic regeneration with productivity up to 200 m3/h.

Parameter Value

Typical Filtrate Flux Range 18-20 m3/h

Maximum operating pressure 8 bar

Temperature range +5…- +400С

Fit connection input/output thread 2”/2” or flange

Weight (without water, approximately) 20 kg

Cartridge standard 20” DOE

Number of FIBAN X-1cartridges 10

Resource before regeneration* 1200 m3

Regenerating solutionsbasic/secondary

5% HNO3 / 0.2% NaОН

Consumption of regenerating solutions for regeneration

200 l

Duration of regeneration 2 hours

Length diameter 700 300 mm

INDUSTRIAL CARTRIDGE FILTER

WATER PURIFICATION PLANT WITH PRODUCTIVITY 40 m3/h

OTHER APPLICATIONS OF FIBAN X-1

drinking and domestic water purification from heavy metal ions

removing heavy metal ions: Fe(II), Cu(II), Ni(II), Co(II), Cd(II), Zn(II), Hg(II) - from the technological solutions

effective sorption of radionuclide Sr-90 concentrating of the heavy and transition metals from diluted

solutions for analysis air purification from the vapor and aerosol impurities of the

basic nature (ammonia, organic amines, hydrazine, oxides and metal hydroxides)

protection means of the respiratory organs organic catalysis (by complex metal ions)

THANK YOU FOR YOUR ATTENTION