Biological detoxification of Cr(VI) using wood-husk immobilized Acinetobacter haemolyticus
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. Aro...
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| Format: | Article |
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Elsevier Science B.V.
2007
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| Online Access: | http://eprints.utm.my/8784/ |
| _version_ | 1848891767090315264 |
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| author | Zakaria, Zainul Akmar Zakaria, Zainoha Surif, Salmijah Ahmad, Wan Azlina |
| author_facet | Zakaria, Zainul Akmar Zakaria, Zainoha Surif, Salmijah Ahmad, Wan Azlina |
| author_sort | Zakaria, Zainul Akmar |
| building | UTeM Institutional Repository |
| collection | Online Access |
| description | 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. |
| first_indexed | 2025-11-15T21:03:12Z |
| format | Article |
| id | utm-8784 |
| institution | Universiti Teknologi Malaysia |
| institution_category | Local University |
| last_indexed | 2025-11-15T21:03:12Z |
| publishDate | 2007 |
| publisher | Elsevier Science B.V. |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | utm-87842017-10-19T03:46:23Z http://eprints.utm.my/8784/ Biological detoxification of Cr(VI) using wood-husk immobilized Acinetobacter haemolyticus Zakaria, Zainul Akmar Zakaria, Zainoha Surif, Salmijah Ahmad, Wan Azlina QD Chemistry 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. Elsevier Science B.V. 2007 Article PeerReviewed 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 http://dx.doi.org/10.1016/j.jhazmat.2007.02.029 |
| spellingShingle | QD Chemistry Zakaria, Zainul Akmar Zakaria, Zainoha Surif, Salmijah Ahmad, Wan Azlina Biological detoxification of Cr(VI) using wood-husk immobilized Acinetobacter haemolyticus |
| title | Biological detoxification of Cr(VI) using wood-husk immobilized Acinetobacter haemolyticus |
| title_full | Biological detoxification of Cr(VI) using wood-husk immobilized Acinetobacter haemolyticus |
| title_fullStr | Biological detoxification of Cr(VI) using wood-husk immobilized Acinetobacter haemolyticus |
| title_full_unstemmed | Biological detoxification of Cr(VI) using wood-husk immobilized Acinetobacter haemolyticus |
| title_short | Biological detoxification of Cr(VI) using wood-husk immobilized Acinetobacter haemolyticus |
| title_sort | biological detoxification of cr(vi) using wood-husk immobilized acinetobacter haemolyticus |
| topic | QD Chemistry |
| url | http://eprints.utm.my/8784/ http://eprints.utm.my/8784/ |