Application of natural citric acid sources and their role on arsenic removal from drinking water: a green chemistry approach

Majumder, Santanu and Nath, Bibhash and Sarkar, Simita and Islam, Sk. Mijanul and Bundschuh, Jochen and Chatterjee, Debashis and Hidalgo, Manuela (2013) Application of natural citric acid sources and their role on arsenic removal from drinking water: a green chemistry approach. Journal of Hazardous Materials, 262. pp. 1167-1175. ISSN 0304-3894


Solar Oxidation and Removal of Arsenic (SORAS) is a low-cost non-hazardous technique for the removal of arsenic (As) from groundwater. In this study, we tested the efficiency of natural citric acid sources extracted from tomato, lemon and lime to promote SORAS for As removal at the household level. The experiment was conducted in the laboratory using both synthetic solutions and natural groundwater samples collected from As-polluted areas in West Bengal. The role of As/Fe molar ratios and citrate
doses on As removal efficiency were checked in synthetic samples. The results demonstrate that tomato juice (as citric acid) was more efficient to remove As from both synthetic (percentage of removal: 78–98%) and natural groundwater (90–97%) samples compared to lemon (61–83% and 79–85%, respectively) and lime (39–69% and 63–70%, respectively) juices. The As/Fe molar ratio and the citrate dose showed an 'optimized central tendency' on As removal. Anti-oxidants, e.g. 'hydroxycinnamates', found in tomato, were shown to have a higher capacity to catalyze SORAS photochemical reactions compared to 'flavanones' found in lemon or lime. The application of this method has several advantages, such as eco- and user- friendliness and affordability at the household level compared to other low-cost techniques.

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Item Type: Article (Commonwealth Reporting Category C)
Refereed: Yes
Item Status: Live Archive
Additional Information: © 2012 Elsevier B.V. All rights reserved. Published online 12 Sep 2012. Permanent restricted access to published version in accordance with the copyright policy of the publisher.
Faculty / Department / School: Current - Faculty of Health, Engineering and Sciences - School of Agricultural, Computational and Environmental Sciences
Date Deposited: 03 May 2013 02:09
Last Modified: 15 Oct 2014 03:33
Uncontrolled Keywords: arsenic; groundwater; solar oxidation; citric acid; anti-oxidant activity
Fields of Research : 09 Engineering > 0904 Chemical Engineering > 090410 Water Treatment Processes
09 Engineering > 0905 Civil Engineering > 090508 Water Quality Engineering
03 Chemical Sciences > 0305 Organic Chemistry > 030504 Organic Green Chemistry
Socio-Economic Objective: D Environment > 96 Environment > 9609 Land and Water Management > 960905 Farmland, Arable Cropland and Permanent Cropland Water Management
Identification Number or DOI: 10.1016/j.jhazmat.2012.09.007

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