包气带土层中石油污染物生物降解的温度效应  

Effect of Temperature on Biodegradation of the Petrochemicals in Contaminated Soil

作　　者：张旭[1] 李广贺[1] 黄巍[2] 

机构地区：[1]清华大学环境科学与工程系,北京100084 [2]谢菲尔德大学土木与结构工程系

出　　处：《环境科学》2001年第4期108-110,共3页Environmental Science

基　　金：国家自然科学基金项目! (4 9972 0 82 ) ;清华大学基础研究基金 !(Jc19990 10 )

摘　　要：温度是影响包气带土层中石油污染物自然衰减的重要因素 .通过室内模拟实验对油污土层微生物降解的温度效应进行研究 ,并预测不同温度下石油污染物的半衰期 .结果表明 ,温度对生物反应速率常数的影响符合关系式K =3 1 4 5exp(-52 3 3 /T) .根据该式对石油污染物的半衰期进行预测 ,得出 5℃、1 0℃、2 0℃和 3 0℃时包气带土层中石油污染物的半衰期分别为 1 4 99d、1 0 75d、572d和 3 1 7d .Temperature is a significant factor of the natural attenuation of the polluted soil The effect of the temperature on the biodegradation rates and the half life of the petrochemicals in contaminated soil were evaluated in this paper by the simulative experiments in laboratory The results showed that the relationship between the temperature and the biodegradation rates was consistent with the exponential equation: K =3145exp(-5233/ T ) According to the prediction of half life of the biodegradation rates by the equation, the half life at 5 ℃, 10 ℃, 20 ℃ and 30 ℃ were 1499 days, 1075 days, 572 days and 317 days respectively

关 键 词：石油污染 包气带 生物降解速率 半衰期 土壤污染 

分 类 号：X172[环境科学与工程—环境科学] X53