Nitnavare, R and Bhattacharya, J and Ghosh, S (2023) Bacterial Biofilters for Arsenic Removal. In: Bio-Nano Filtration in Industrial Effluent Treatment Advanced and Innovative Approaches. Environment & Agriculture, I . CRC Press, Boca Raton, pp. 1-14. ISBN 9781003165149
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Arsenic (As) contamination is one of major causes of health threats in various regions of the world. The primary source for arsenic pollution is through groundwater contaminated by natural sources of arsenic found in the earth’s crust. Additionally, they enter the ecosystem via various anthropogenic activities such as mining, smelting and agricultural products comprising arsenic salts. Some medicinal agents have also been found to contain arsenic as a major component for the treatment of diseases. Small concentrations of arsenic have the potential to cause long term toxic effects such as arsenicosis. The reduced form of As(V) (arsenate) is As(III) (arsenite) which is relatively more toxic. Further, the inorganic form is more toxic than the organic arsenic species. Numerous phototrophic anaerobic bacterial species are known to possess mechanism which transforms As (III) to As(V). Many of the bacterial species have also evolved mechanisms to use As for internal metabolic purposes such as arsenotrophy which is the reduction of As(V) or oxidation of As (III). Additionally, microorganisms also possess tolerance systems which detoxify As(III) into its reduced form As(V) via certain factors. Numerous such bacterial species have been identified and isolated from arsenic contaminated environments and the various mechanisms associated with arsenic removal have been explored. As(III) oxidizing bacteria have shown promising results in the reduction of arsenic in groundwater which is the main source of arsenic contamination. Modern technologies would further aid in defining the direct or indirect roles of such bacterial species in the treatment of arsenic contamination and its associated bioremoval.
| Item Type: | Book Section |
|---|---|
| Divisions: | Research Program : Genetic Gains |
| CRP: | UNSPECIFIED |
| Series Name: | Environment & Agriculture |
| Uncontrolled Keywords: | Bacterial Biofilters, arsenic pollution |
| Subjects: | Others > Genetic Engineering |
| Depositing User: | Mr Nagaraju T |
| Date Deposited: | 23 Jan 2024 04:31 |
| Last Modified: | 23 Jan 2024 04:31 |
| URI: | http://oar.icrisat.org/id/eprint/12394 |
| Acknowledgement: | UNSPECIFIED |
| Links: |
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