Property | Value |
Name | REMOVAL OF CHROMIUM (VI) FROM POLLUTED WATERS: A BIOLOGICAL APPROACH |
Description | Research article:- R.H. Krishna Reddy, N. Naga Malleswara Rao, J. V. Suman Krishna , K. Ravindhranath* Department of Engg. Chemistry and Post Graduate Chemistry, Bapatla Engineering College (Autonomous), BAPATLA-422101, Guntur Dt., A.P.India.
Abstract:- Leaves and their ashes of Tephrosia purpurea and Solanum nigrum have been found to have affinity towards Chromium(VI) at low pHs. The sorption abilities of these plant materials have been studied with respect to various physicochemical parameters such as pH, equilibration time and sorbent concentration in controlling the Chromium (VI) pollution in waste waters adopting batch system of extractions. Conditions for maximum extraction have been optimized. With synthetic waters, % of extractions of Chromium (VI) are found to be 84.0% and 88.0% with leaves powders and their ashes of Tephrosia purpurea respectively and 100.0% with both the leaves powders and their ashes of Solanum nigrum. Fivefold excess of common cation ions present in natural waters, viz., Ca2+, Mg2+ , Cu2, Zn2+, Ni2 + and Fe2+ are found to have synergistic effect in increasing the % removal of Chromium while anions like Phosphate, SO42- and Carbonate are interfering; monovalent ions: NO3- , Chloride, and Fluoride have marginal interference. The methodologies developed are successfully applied to some real samples of industrial effluents and polluted lakes
Keywords:-Chromium (VI), pollution control, bio-sorbents, Tephrosia purpurea, Solanum nigrum. |
Filename | Ravindhranath K et al..pdf |
Filesize | 637.96 kB |
Filetype | pdf (Mime Type: application/pdf) |
Creator | admin |
Created On: | 04/17/2012 00:00 |
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Last updated on | 05/17/2012 22:50 |
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