Journal of Food, Agriculture and Environment

Vol 4, Issue 3&4,2006
Online ISSN: 1459-0263
Print ISSN: 1459-0255

Chemical speciation of metals in environment, its relevancy to ecotoxicological studies and the need for biosensor development


P. A. Azeez 1*, B. Anjan Kumar Prusty 1, E. P. Jagadeesh 2

Recieved Date: 2006-05-17, Accepted Date: 2006-08-11


Compared with studies on metal toxicity, studies discussing toxicity in the context of the environmental chemistry of metals are rare. Studies on chemical fractionation of metals upon their entry to the environment, as a contaminant, furthermore are rather less. On the other hand, studies reporting environmental residues of such pollutants are numerous from locations round the globe, especially developed and developing economies. Nevertheless, the role of chemical speciation or fractionation of metal pollutants in the manifestation of toxicity is well realized: the importance of the bio-available fractions is also well acknowledged. It is found that certain fractions of the metals are likely to get attached to the cell surface and transported inside while major portion of the metals remains in the medium unable to enter the organism. This situation is largely determined by the physicochemical characteristics of the microenvironment of the organism. Organisms are known to change their interior settings as well as external microenvironment either to restrict the entry of a toxicant to their body structure or to selectively gather required elements. The present paper attempts to brief chemical speciation of metals in view of the above facts. Attempt is also made to relate it to bioavailability and toxicity, and to discuss the potentials of biosensors in investigating metal pollution.


Metal, speciation, toxicity, bioavailability, biosensors, bio-reporters

Journal: Journal of Food, Agriculture and Environment
Year: 2006
Volume: 4
Issue: 3&4
Category: Environment
Pages: 235-239

Full text for Subscribers

Note to users

The requested document is freely available only to subscribers/registered users with an online subscription to the Journal of Food, Agriculture & Environment. If you have set up a personal subscription to this title please enter your user name and password. All abstracts are available for free.

Article purchasing

If you like to purchase this specific document such as article, review or this journal issue, contact us. Specify the title of the article or review, issue, number, volume and date of the publication. Software and compilation, Science & Technology, all rights reserved. Your use of this website details or service is governed by terms of use. Authors are invited to check from time to time news or information.

Purchase this Article:   20 Purchase PDF Order Reprints for 15

Share this article :