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Research Article Open Access

Efficacy of Agricultural Wastes in the Removal of Hexavalent Chromium- A Review.


Hexavalent Chromium is a major pollutant released during several industrial operations. It is also reported as one of the metals known to be carcinogenic and has an adverse potential to modify the DNA transcription process. The removal of hexavalent chromium has been studied by various authors employing adsorbents developed from waste agro by-products to assess their adsorption characteristics. This paper focuses on the comparison of some agro based products in the removal of Cr(VI) ions. An extensive list of agricultural based products such as Coconut Coir, Prunus amygdalus, Cissus quadrangularis, Soapnut Acacia, Justicia adhatoda, Bhringraj, Aerva lanata, Trianthema portulacastrum, Tephrosia purpurea, Solanum nigrum, Datura metel, Cleome viscose, Asparagus racemosus for the removal of Cr(VI) from aqueous solutions and the discharged effluents from industries are reviewed in this work. As chemically modified adsorbents exhibit higher adsorption capacity, a number of chemicals have been utilized for the required modifications of the adsorbent materials in the research articles. The results declared by the authors have been compared and summarized for further probe into the extensive utilization of the employed materials.

N Muthulakshmi Andal and S Charulatha

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