The application of nano-crystalline PbO2 as an anode for the simultaneous bio-electrochemical denitrification and organic matter removal in an up-flow undivided reactor

Mook, W.T. and Aroua, M.K. and Chakrabarti, M.H. and Low, C.T.J. and Aravind, P.V. and Brandon, N.P. (2013) The application of nano-crystalline PbO2 as an anode for the simultaneous bio-electrochemical denitrification and organic matter removal in an up-flow undivided reactor. Electrochimica Acta, 94. pp. 327-335. ISSN 0013-4686, DOI

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A nano-crystalline PbO2 coated carbon composite has been applied as an anode for an up-flow undivided bio-electrochemical reactor (UBER). This electrode provides an enhanced destruction of organic matter in synthetic wastewater in comparison to other anodic materials such as stainless steel, graphite and carbon felts or titanium. The cathode is a granular activated carbon coated with a film of autohydrogenotrophic bacteria. Denitrification occurs simultaneously at the cathode while organic matter is oxidized at the anode. Optimum conditions for the simultaneous removal of organic matter and nitrate from response surface methodology (RSM) studies are an inter-electrode spacing of 3.2 cm, electric current of 18 mA and HRT of 45 h that gave organic matter removal efficiencies of 83 along with 99 removal of nitrate. Further studies on the mechanisms of denitrification and organic matter removal are envisaged.

Item Type: Article
Additional Information: Export Date: 21 April 2013 Source: Scopus CODEN: ELCAA :doi 10.1016/j.electacta.2013.02.001 Language of Original Document: English Correspondence Address: Chakrabarti, M.H.; Department of Chemical Engineering, University of Malaya, 50603 Kuala Lumpur, Malaysia; email: References: Saleem, M., Essa, M.H., Suitability for Sustainable Reuse of Secondary Effluent: A Case Study in Saudi Arabia (2010) NED University Journal of Research, 7, p. 23; (2007) Toxicity and Exposure Assessment for Children's Health, ,, Nitrates and Nitrites, TEACH Chemical Summary, U.S. EPA accessed December 2012; Saleem, M., Chakrabarti, M.H., Diya'Uddeen, B.H., Electrochemical removal of nitrite in simulated aquaculture wastewater (2011) African Journal of Biotechnology, 10, p. 16566; Gavrilescu, M., Fate of pesticides in the environment and its bioremediation (2005) Engineering in Life Sciences, 5, p. 497; Trasatti, S., Adsorption of organic substances at electrodes: Recent advances (1992) Electrochimica Acta, 37, p. 2137; 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Uncontrolled Keywords: Nano-crystalline PbO2; RSM; Simultaneous organic matter removal and denitrification; UBER; Bio-electrochemical reactors; Granular activated carbons; Nanocrystallines; Organic matter removal; Organic matter removal efficiencies; Response surface methodology; Biogeochemistry; Biological materials; Cathodes; Crystalline materials; Denitrification; Electric reactors; Lead oxide; Nitrates; Organic compounds.
Subjects: T Technology > TA Engineering (General). Civil engineering (General)
T Technology > TP Chemical technology
Divisions: Faculty of Engineering
Depositing User: Mr Jenal S
Date Deposited: 16 Jul 2013 01:37
Last Modified: 18 Mar 2019 04:35

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