air pollution laboratory
TRANSCRIPT
ZN1109, Block Z,Department of Civil Environmental and Engineering,The Hong Kong Polytechnic University
Air Pollution Laboratory
Air laboratory is a well-established laboratoryin providing air pollution study at institutionallevel and serving to general public in HongKong since 1982. Our laboratory hasequipped with many cutting-edge air samplingequipment and analyzers for supportinginnovative research projects and generallaboratory-teaching experiment.The Air Pollution Laboratory performsexperiment in 3 main areas, namely criteriaair pollutant measurements, volatile organiccompounds and organic aerosolmeasurements and indoor air quality (IAQ)study.
Introduction
High volume air samplers are usedfor the collection of airborneparticulate matter in ambient air.They are available for the collectionof Total Suspended particulates(TSP), particulate matter with anaerodynamic diameter of less than10µm (PM10), or less than 2.5µm(PM2.5), and semi-volatile organiccompounds and pesticides (PUF).
High Volume Air SamplersTeledyne API Gas Analyzers for Criteria Air Pollutant Measurements
Teledyne API Ozone / CarbonMonoxide / Carbon Dioxide /Sulphur Dioxide / NitrogenOxides / Methane and Non-methane Analyzers provide acomprehensive criteria pollutantsmonitoring in the air which areconsidered hazardous to humanhealth.
Main Equipment and Facilities
Cape D’Aguilar (Hok Tsui) Air Monitoring Station
Cape D’Aguilar is a strategic airmonitoring station in South ChinaSea to obtain the baseline levels ofair pollutants in this region.
It helps to monitor the long rangetransboundary air pollution due tocold-fronts in winters or due to thestorm surge in typhoons andgreenhouse gases emission due totidal movements.
The Aerodyne aerosol massspectrometer (AMS) is the onlycurrently available instrumentcapable of providing quantitativesize and chemical mass loadinginformation in real-time for non-refractory sub-micron aerosolparticles. The AMS couples size-resolved particle sampling andmass spectrometric techniques intoa single real-time measurementsystem.
Aerosol Mass SpectrometerThermo-desorption Aerosol Gas
Chromatography
The Aerodyne Thermo-desorptionAerosol Gas Chromatography(TAG) automates online samplingand analysis of condensed phase(e.g. aerosol) organic compoundsand eliminates the laborioussample collection, transportation,storage, and preparation processassociated with filter basedmeasurement.
Main Equipment and Facilities
DRI 2001A Organic Carbon / Elemental Carbon Analyzer
Carbonaceous aerosols such asorganic carbon (OC) and elementalcarbon (EC) are detected by a2001A carbon analyzer developedby Desert Research Institute.
The OC and EC by total opticalreflectance (TOR) are insensitive tothe change in temperature protocol,and therefore the long-termconsistency of the IMPROVEdatabase is conserved.
High Performance Liquid Chromatography
High-performance liquid chromatographyis a technique in analytical chemistryused to separate, identify, and quantifyeach component in a mixture.
The HPLC in Air Pollution Laboratory ismainly for chemical characterization oftrace-level of carbonyl compounds in airsamples.
Filter Handling Room
A temperature and pressurecontrolled clean room meetsClass 5 ISO standard, whichprovides a stable environment forfilter handling process for aerosolstudy.
The gravitational analysis is doneby a 6-digit Mircobalance on anti-virbration platform. It couldaccurately measure the mass ofaerosol collected and depositedon the filter substrates.
Main Equipment and Facilities
arbonaceous aerosols, including organic carbon (OC) and elemental carbon (EC), were detected by a DRI 2001A carbon analyzer.
Environmental Chamber
The Environmental Chamber is amicro-environment which controltemperature and humidity duringmeasurements of pollutant emissions inindoor air and stimulation the evolutionof air pollutants in ambient air.
By equipping the Teflon Air Chamberwith UV sources, the EnvironmentalChamber can simulate thephotochemical smog formation viachemical reactions of precursors inambient air.
HP 6980 Gas Chromatography and 5977A Mass Selective Detector / Flame Ionization Detector /Electron Capture Detector equipped with Entech 7200
Preconcentrator
GC/MSD/FID/ECD are used to analyze VOCs in canistersamples. This technique reaches world-class level. Inter-laboratory comparison is regularly conducted between AirPollution Laboratory and authoritative institutions in the world.
Trace-level volatile organic compounds (VOCs) in air areanalyzed by HP 6980 Gas Chromatography and MassSelective Detection / Flame Ionization Detection / ElectronCapture Detection by directly injecting transformedcondensate compounds, which are preconcentrated byEntech 7200 Preconcentrator, from gas phase canistersamples collected in ambient air.
With connecting to the Environmental Chamber, the VOCscompounds can be measured directly for emissionmeasurements of indoor air studies or stimulation ofphotochemical smog formation studies.
Main Equipment and Facilities
Prof. Guo, H. (郭海)Professor and Air Pollution Laboratory in Charge
Email: [email protected]
Homepage: https://www.polyu.edu.hk/cee/~ceguohai/
Prof. Lee, S.C. (李順誠)Professor and Associate Head (Partnership)
Email: [email protected]
Homepage: https://www.polyu.edu.hk/cee/~cesclee
Prof. Wang, T. (王韜)Chair Professor of Atmospheric Environment
Email: [email protected]
Homepage: https://www.polyu.edu.hk/cee/~cetwang/
Academic Staff
Research SpotlightGround-level ozone increases across China and relationships with ozone precursors
Sources of volatile organic compounds – receptor model applications
Nationwide O3increases in China since 2014
O3 increases in PRD in last decade
Relative incremental reactivity represents O3-precursor relationships
Source contributions to VOCs in Hong Kong resolved by PMF
Profiles of VOC sources in Wuhan, central China
VOC-limited regime in urban areas
In situ measurements of molecular organic aerosol markers and dynamic sources of atmospheric organic aerosols
Ultrafine and acidic particles in the atmosphere
Research Spotlight
Highly time-resolved Organic aerosol markers
Particle number distributions in new particle formation processes
Atomic force microscopic images of acidic ultrafine particles in the atmosphere
Tests of particle removal efficiency of filtration materialsIndoor air pollution – Are we breathing healthy air at home?
Research Spotlight
Outdoor
We know more than ever what breathe
Sources of and source contributions to indoor organic matters
Particle filtration efficiency of N95 masks
Morphology of PFTE membrane
Prof. Guo, H. (郭海)Professor and Air Pollution Laboratory in Charge
Email: [email protected]
Homepage: https://www.polyu.edu.hk/cee/~ceguohai/
Lab-in-charge and Technical Staff
AddressRoom ZN1109, The Hong Kong Polytechnic University
Opening HoursMonday 8:45am – 12:30pm, 1:30pm – 5:45pmTuesday to Friday 8:45am – 12:30pm, 1:30pm – 5:30pm(excluding Saturday, Sunday & public holidays)
Mr CHAN, C.S., JazzEmail: [email protected]
Tel: (852) 2766 6023
Lab-in-Charge Technical Staff