不同共代谢基质条件下六氯苯的厌氧降解研究  

Anaerobic Degradation of Hexachlorobenzene Under Different Co-metabolism Substrates Conditions

作　　者：萨如拉[1,2] 王波[1] 贾晓珊[2] 杨小毛[1,3] 

机构地区：[1]深港产学研环境技术中心,广东深圳518057 [2]中山大学环境科学与工程学院,广东广州510275 [3]北京大学深圳研究生院,广东深圳518055

出　　处：《环境科学与技术》2009年第B06期35-38,共4页Environmental Science & Technology

基　　金：“985”工程二期项目（2005-90004-3172000）.

摘　　要：针对具备六氯苯（HCB）降勰能力的厌氧混合培养物，采用标准血清瓶实验进行了以葡萄糖、甲酸、乙酸和丁酸（添加量均为TOC=400mg／L）为共代谢基质时对HCB的降解研究。结果表明，在上述条件下28d的反应时间内HCB的降解率依次为62.5％、28.4％、49.4％和53.6％；实验的回归结果表明，降解反应均符合一级动力学方程，反应速率常数的大小为K乙酸〉K葡萄糖〉K丁酸〉，表明乙酸为共代谢基质时HCB的降解速率较快。结果表明维持一定的一级基质浓度有利于提高HCB降解率。The glucose, formic acid,acetic acid and butyric acid were selected as co-metabolism substrates of anaerobic bacteria mixture. The degradation rates of hexachlorobenzene（HCB）were studied in co-substrate systems with standard serum bottle tests. The results showed that with glucose, formic acid, acetic acid and butyric acid as the co-metabolism substrate, respectively, the degradation rate of HCB in 28 days reached to 62.5%,28.4%,49.4% and 53.6%. The degradation reaction obeyed the first kinetic equation. The rate constants of reactions were Kacetic acid〉Kformic〉Kglucose〉Kbutyric, which showed that the degradation rate was the fastest with the acetic acid as the co-metabolism substrate. The results showed that degradation rates of HCB were related to the co-metabolism substrate and its concentrations.

关 键 词：六氯苯 厌氧降解 共代谢基质 降解速率 

分 类 号：X132[环境科学与工程—环境科学]