Hexachlorobenzene dechlorination by indigenous sediment microorganisms

JOURNAL OF HAZARDOUS MATERIALS

卷:177

Article

Chen, I-Ming²  Wanitchapichat, Wanit¹  Jirakittayakorn, Teeranuch¹  Sanohniti, Sukanda¹  Sudjarid, Wichidtra¹  Wantawin, Chalermraj¹  Voranisarakul, Jarurat¹  Anotai, Jin¹ 

[1] King Mongkuts Univ Technol Thonburi, Dept Environm Engn, Natl Ctr Excellence Environm & Hazardous Waste Ma, Fac Engn, Bangkok 10140, Thailand

[2] Chia Nan Univ Pharm & Sci, Dept Environm Resources & Management, Tainan 71710, Taiwan

关键词: Bioremediation;    Chlorobenzene;    Dechlorination;    Methanogen;    Sulfate-reducing bacteria;   

DOI  :  10.1016/j.jhazmat.2009.12.024

来源: Elsevier

【 摘 要 】

Indigenous microbes from the sediments, whether contaminated with hexachlorobenzene (HCB) or not, could dechlorinate HCB effectively without any acclimation and supplemental nourishment. Temperature seriously affected the HCB-dechlorination: within the measured 15-45 degrees C span, the optimum range was between 30 and 35 degrees C. Sulfate-reducing bacteria (SRB), denitrifiers, and acetogens might not be directly involved in the HCB dechlorination. However, the SRB retarded subsequent dechlorination of pentachlorobenzene to tetra- and trichlorobenzenes. Some vancomycin-resistant gram-positive bacteria and methanogens were most likely to be the HCB-dechlorinators. The dechlorination followed the Michaelis-Menten behavior with the k(m)', and K-HCB between 0.45-0.73 mg L-1 day(-1) and 3.2-17.2 mg L-1, respectively. These findings suggest a potential HCB treatment and cleanup for wastewater and contaminated site. (C) 2009 Elsevier B.V. All rights reserved.

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