电动生物修复湖泊底泥中直链烷基苯磺酸钠  

Bioremediation of Lake Sediment Contaminated by Linear Alkylbenzene Sulphonates Using Electrokinetic Technology

作　　者：刘广容[1,2] 叶春松[1] 钱勤[1] 张静[1] 

机构地区：[1]武汉大学动力与机械学院水质工程系,湖北武汉430072 [2]武汉大学污淤泥研究中心,湖北武汉430072

出　　处：《环境科学与技术》2011年第9期59-62,共4页Environmental Science & Technology

摘　　要：直链烷基苯磺酸钠(Linear Alkylbenzene Sulfonates,LAS)是环境中最常见的具有代表性的一类有机污染物,城市湖泊长期以来接纳了大量的污染物,致使底泥沉积了大量的LAS。采用电动生物复合技术修复东湖底泥中LAS,由于其LAS含量过高,当直接添加芽孢杆菌降解LAS时,发现无明显的降解效果。经过驯化培养芽孢杆菌,得到了降解LAS的菌株。电动生物修复LAS去除率达到40.5%,比单纯的生物修复高出三十多个百分点,比单纯电动修复高出二十个百分点。电极正负极交替有利于底泥中LAS的降解与去除。Electrodynamic and biological technologies are combined and applied to the remediation of LAS-contaminated lake sediments.A bench scale experiment was conducted with an electrodynamic apparatus and the sediment samples were taken up from East Lake,the largest urban lake in Wuhan,polluted by domestic wastewater containing organic pollutants such as linear alkylbenzene sulphonates（LAS）.The experiment started from culture of Bacilli which belong to LAS degrading strains and then electric field was exerted.The coupled electrodynamic bioremediation of the sediment resulted in removal of LAS by 40.5%,a remarked increase compared to biological method singly used.It was found as well that electric field polarity reversal could boost LAS degradation in sediment.

关 键 词：电动生物修复 芽孢杆菌 直链烷基苯磺酸钠 湖泊底泥 

分 类 号：X523[环境科学与工程—环境工程]