AAS - A Tool for Monitoring Trace Metals in Environment

Sekhar, K C (1994) AAS - A Tool for Monitoring Trace Metals in Environment. In: Proceedings of the Workshop on Modern Methods of Chemical Analysis for Minerals Metals and Pollutants (MMCA - 1994), January 18-20, 1994, National Metallurgical Laboratory, Jamshedpur.



Rapid industrialisation coupled with geochemical alter-ations posed a major threat to environment. Pollution of air, soil and water with both organics and inorganics is a matter of great concern, however, the non-degradable persistent trace metals are the most pressing problems of present decade. They are the most insidious pollutants because of their non-biodegradable nature and property to effect all forms of ecological systems. Owing to their toxicity and ill-effects on living being the present day scientists and researchers have developed interest in the amounts, origin and fate of certain elements. For example certain trace elements such as cadmium, chromium, mercury, lead and vanadium are of great concern because of their toxic effects on plants, animals and humans. Essential trace elements, such as chromium, vanadium, manganese. iron, cobalt, copper and zinc are indispensible for the growth and survival of mankind. From the point of view of toxicity metals can be classified according to the following three criteria: non-critical, toxic and very toxic. Classification of elements according to toxicity and availability is given in Table-1. The impact of heavy metal contamination in biosphere is slowly being reco-gnised as a potential Health Hazard not only to human beings but almost all the major industries are also affected by trace elements imbalances. For instance the presence of silica in boiler feed water at 30 to 1000 ppm level leads to appearance of scale forming silicates which reduces the heat transfer from boiler.

Item Type:Conference or Workshop Item (Paper)
Official URL/DOI:http://eprints.nmlindia.org/4307
Uncontrolled Keywords:Chromium; Vanadium; manganese; cobalt; copper
Divisions:Analytical Chemistry
ID Code:4307
Deposited By:Sahu A K
Deposited On:21 Nov 2011 14:03
Last Modified:07 Oct 2013 18:09
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