Department of Environmental Resources and Management, Chia-Nan University of Pharmacy and Science, Tainan 71710, Taiwan, ROC.
J Hazard Mater. 2010 May 15;177(1-3):244-50. doi: 10.1016/j.jhazmat.2009.12.024. Epub 2009 Dec 11.
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.
沉积物中的土著微生物，无论是否受到六氯苯（HCB）的污染，都可以在无需驯化和补充营养的情况下有效地脱氯 HCB。温度对 HCB 的脱氯有严重影响：在所测的 15-45°C 范围内，最佳温度范围在 30-35°C 之间。硫酸盐还原菌（SRB）、反硝化菌和产乙酸菌可能不直接参与 HCB 的脱氯。然而，SRB 会延迟五氯苯后续脱氯为四氯和三氯苯。一些万古霉素抗性革兰氏阳性菌和产甲烷菌很可能是 HCB 的脱氯菌。脱氯遵循米氏动力学，k'(m) 和 K(HCB) 分别在 0.45-0.73 mg L(-1)day(-1)和 3.2-17.2 mg L(-1)之间。这些发现为废水和污染场地的 HCB 处理和清理提供了一种潜在的方法。
