4.7 Article

De-mercurization of wastewater by Bacillus cereus (JUBT1): Growth kinetics, biofilm reactor study and field emission scanning electron microscopic analysis

期刊

JOURNAL OF HAZARDOUS MATERIALS
卷 194, 期 -, 页码 355-361

出版社

ELSEVIER SCIENCE BV
DOI: 10.1016/j.jhazmat.2011.07.109

关键词

Biofilm; Chlor-alkali industry; Mathematical model; Packed bed filter; Packed bed reactor

资金

  1. University Grants Commission

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Removal of mercuric ions by a mercury resistant bacteria, called Bacillus cereus (JUBT1), isolated from the sludge of a local chlor-alkali industry, has been investigated. Growth kinetics of the bacteria have been determined. A multiplicative, non-competitive relationship between sucrose and mercury ions has been observed with respect to bacterial growth. A combination of biofilm reactor, using attached growth of Bacillus cereus (JUBT1) on rice husk packing, and an activated carbon filter has been able to ensure the removal of mercury up to near-zero level. Energy dispersive spectrometry analysis of biofilm and the activated carbon has proved the transformation of Hg2+ to Hg-0 and its confinement in the system. (C) 2011 Elsevier B.V. All rights reserved.

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