苯系化合物好氧生物降解性研究  

BIODEGRADABILITY OF HYDRO-CARBONS UNDER AEROBIC CONDITION

作　　者：王菊思[1] 赵丽辉[1] 匡欣[1] 贾智萍[1] 

机构地区：[1]中国科学院生态环境研究中心,北京100085

出　　处：《环境化学》1993年第5期394-400,共7页Environmental Chemistry

摘　　要：选用城市污水处理场的活性污泥做菌源,研究了苯、甲苯、邻-、间-、对-二甲苯、乙基苯、三甲苯等七种芳香化合物的好氧生物降解规律。实验结果表明,七种化合物浓度在10mg/l左右时,在实验周期内能全部降解;浓度在40—180mg/l时,有的化合物不能被降解。七种化合物降解的难易程度为:甲苯>间二甲苯>苯>对二甲苯>乙基苯>三甲苯>邻二甲苯。此外,实验结果还表明,化合物的降解性受苯环上取代基数量及位置等因素的影响,化合物在经过驯化的生物体系中降解率增加。The biodegradation of benzene and its homoiogs, such as toluene, o-xy-lene,m-xylene, p-xylerie, ethyibenzene, and 1,3,15-trimethyibenzene was studied with mixed culture from activated sludge. These aromatic hydrocarbons can be degraded easily when the concentrations are below 10mg/L The biodegradabiiity of the compounds are in the order of the following: toluene, m-xylene, benzene,p-xylene, ethyibenzene, 1,3, 5-trimethylbenze-ne, o-xylene. It is found that the number and position of methyl group on benzene nuclous cause significant differences in biodegradabiiity of these compounds.

关 键 词：生物降解性 苯系化合物 好氧生物 

分 类 号：X132[环境科学与工程—环境科学]