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Biological detoxification of Cr(VI) using wood-husk immobilized Acinetobacter haemolyticus

Zakaria, Zainul Akmar and Zakaria, Zainoha and Surif, Salmijah and Ahmad, Wan Azlina (2007) Biological detoxification of Cr(VI) using wood-husk immobilized Acinetobacter haemolyticus. Journal of Hazardous Materials, 148 (1-2). pp. 164-171. ISSN 0304-3894

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Official URL: http://dx.doi.org/10.1016/j.jhazmat.2007.02.029


Acinetobacter haemolyticus, a Gram-negative aerobic locally isolated bacterium, immobilized on wood-husk showed the ability to detoxify Cr(VI) to Cr(III). Wood-husk, a natural cellulose-based support material, packed in an upward-flow column was used as support material for bacterial attachment. Around 97% of the Cr(VI) in wastewater containing 15 mg L-1 of Cr(VI) was reduced at a flow rate of 8.0 mL min-1. The wastewater containing Cr(VI) was added with liquid pineapple wastewater as nutrient source for the bacteria. Electron microscopic examinations of the wood-husk after 42 days of column operation showed gradual colonization of the wood-husk by bacterial biofilm. The use of 0.1% (v/v) formaldehyde as a disinfecting agent inhibited growth of bacteria present in the final wastewater discharge. This finding is important in view of the ethical code regarding possible introduction of exogenous bacterial species into the environment.

Item Type:Article
Uncontrolled Keywords:detoxification; electroplating; acinetobacter; Cr(VI); pineapple wastewater
Subjects:Q Science > QD Chemistry
ID Code:8784
Deposited By: Zalinda Shuratman
Deposited On:12 May 2009 08:52
Last Modified:19 Oct 2017 03:46

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