Designed for monitoring heavy metals and
Poly-nuclear Aromatic Compounds in ambient air
Mining and Mineral-based industries (including crushers, cement plants, thermal power plants, steel andother metal refining and processing plants, coke-ovens, brick/lime and pottery kilns, etc. all emit largequantities of pollutants in air; not just ordinary dust, smoke, CO2 and CO but toxic, phyto-toxic andharmful gases and toxic particulates. Very often these include components of toxic heavy metals like As,Cd, Cr, Hg, Ni, Pb etc. as also (sometimes) highly toxic organics causing serious human – health, cropdamage and economic losses besides adverse ecological impacts. Almost all heavy metals have serious & chronic adverse health effects. These are carcinogenic in nature &very lethal to health. Studies by WHO as well as other well known International medical groups haveconfirmed that most heavy metals are human genotoxic carcinogens and there is no identifiablethreshold level below which these metals may not pose a risk to human health. Also many organic carcinogens including PAH occur in ambient air in particulate form.Recognizing these potential dangers to human health, Govt. of India have mandated monitoring of some heavy metals and PAH. Standards have been notified for them in the National Ambient Air Quality Standards (NAAQS) of November, 2009. The limits for Lead, Arsenic and Nickel along with PAH’s have been prescribed. Since impacts of these on health are noticeable only over a long period, annual average limits have been laid down.Currently, heavy metals are being measured by analyzing the dust collected over the filter papersexposed, primarily for monitoring of PM10, for 8 hour or 24 hour duration. One is able to detect thepresence of heavy metals but not be able to measure it precisely due to the small quantity of PM due toshort duration of Sampling as ,most Sampling System have operational limits to maximum 24 hours.. Andif one wanted to calculate reliable annual average, then over 300 samples shall have to be collected, extracted and analyzed which is very laborious, time consuming and costly exercise.A need was thus felt for a long time for a sampler which can collect samples over longer periods enabling collection of adequate particulate matter representing an average over a long period.Envirotech, with its pioneering spirit, joined hands with IIT Delhi & has developed a unique sampler,which can collect samples over at least a month. Thus, only 12 samples may be required to calculate theannual average values in a reliable and representative manner. This would greatly ease the analyticalefforts and reduce the uncertainty involved. The developed sampler is now commercially available. It canrun 24X7 for 30 days using a standard filter paper of EPM 2000 grade. This would also allow estimation of seasonal values. Composite Samples using a programmable timer (optionally) can also be supplied.
- Best available sampler for monitoring of Heavy metals and PAHs.
- Totally indigenous (designed, developed by IIT Delhi and made in India)
- Uses a maintenance-free brush-less pump with low noise.
- Lower sampling rate of 1LPM reduces filter choking even in areas having high FPM levels.
- Able to collect sample for 30 days with continous24X7operation
- By locating filter holder assembly separate from all power dissipating components, the system ensures that the temperature of filter remains close to the ambient temperature and there is no chance of losing volatile fraction of PM.
- Omni-directional air inlet
- Compact and portable for convenient field operation.
Constant sampling rate of 1 liter per minute, unaffected by voltage fluctuation maintained by critical orifice system.
Filter holder designed to accept any standard 47 mm diameter (EPM 2000) filter disc.
Dry Gas meter records the total air volume sampled.
Programmable timer is available to program, start and shut off sampler for composite sampling as per requirement (Optional).
Single phase AC 220 volts, 50 Hertz supply. Sampler unaffected by +/- 10% fluctuation in supply voltage OR with 12V sealed Rechargeable Battery with battery backup of 30 days operations.
Dimension: (W X D X H) in cm. with Impactor & Inlet
35 X 26 X 87, with Inlet: 35 X 26 X 58 Weight: 10 kg (approx.) Solar Panel along with battery can also be optionally provided to run this sampler at remote locations.
Download PDF Below.