Please use this identifier to cite or link to this item: http://10.1.7.192:80/jspui/handle/123456789/316
Title: Arsenic Removal from Drinking Water by Electrocoagulation
Authors: Gandhi, Sanjay P.
Keywords: Chemical 2006
Project Report 2006
Chemical Project Report
Project Report
06MCH
06MCH016
EPD
EPD 2006
Issue Date: 1-Jun-2008
Publisher: Institute of Technology
Series/Report no.: 06MCH016
Abstract: Arsenic contamination is an enormous worldwide problem. Arsenic occurs in both inorganic and organic forms in water. Individuals with lifetime exposure to arsenic develop the classic symptoms of arsenic poisoning. Most of the techniques developed for pentavalent arsenic [As(V)] species are not very effective for trivalent arsenic ions [As(III)] which are more toxic and mobile than arsenate ions. Among several options available for removal of arsenic from well water, electrocoagulation (EC) is a very promising electrochemical treatment technique that does not require the addition of chemicals or regeneration. First, this study will provide an introduction to the fundamental concepts of the EC method. Present investigation aims to remove both by Electrocoagulation. Electrocoagulation (EC) is an empirical water treatment technology that has had many different applications. It has proven its viability by removing a wide range of pollutants. In the present study electrocoagulation has been evaluated as a treatment technology for Arsenite [As(III)] and Arsenate [As(V)] removal from water. Laboratory scale experiments were conducted with three electrode materials namely, iron, aluminum and Stainless Steel to assess their efficiency. Combination of electrodes, such as aluminum- SS and iron-SS in a single electrochemical cell provide an alternative method for removal of arsenic from water by electrocoagulation. Batch & Continues study was carried out at laboratory scale. Laboratory scale experiments were conducted for different pH range for different electrode configuration. EC was able to bring down aqueous phase arsenic concentration. Efficiency was achieved up to 98%. The removal mechanism of As(III) by EC seems to be oxidation of As(III) to As(V) and subsequent removal by adsorption/complexation with metal hydroxides generated in the process. The results suggest that electrocoagulation can be used effectively for the removal of A(III) & As(V).
URI: http://hdl.handle.net/123456789/316
Appears in Collections:Dissertation, CH (EPD)

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