深度及含水率对包气带砂层中柴油降解作用的影响  

Impact of Depth and Moisture to Diesel Degradation in Sand Layer of Vadose Zone

作　　者：王冰[1] 赵勇胜[1] 屈智慧[1] 郑苇[1] 朱巍[1] 龙北生[2] 焦立娜[1] 许超[1] 

机构地区：[1]吉林大学环境与资源学院,长春130026 [2]长春工程学院水利与环境工程学院,长春130012

出　　处：《环境科学》2011年第2期530-535,共6页Environmental Science

基　　金：国家高技术研究发展计划(863)项目(2007AA063Z343)

摘　　要：通过模拟砂柱实验,研究了不同深度及含水率砂层(包括细砂、中砂和粗砂)中的柴油降解特性.结果表明,介质的深度及含水率是影响柴油降解效率的重要因素.相同介质条件下,介质的含水率越大,其生物活性越强,生物作用降解柴油的效率越高.介质性质影响柴油在包气带介质中的降解效率,介质的颗粒越细,其降解柴油的能力越高,即细砂>中砂>粗砂.挥发作用和生物作用是影响包气带中柴油自然衰减的重要作用.Through the experiment simulated sand columns,the biodegradation characteristics of diesel in sand layers（including fine sand,medium sand and coarse sand） with different depths and moisture contents were studied.The results show that the depth and moisture content of medium are important factors in affecting the efficiency of diesel degradation.In the same medium conditions,the higher moisture content of the medium,the higher biological activity,and biological degradation efficiency of diesel are observed.The nature of medium affects the efficiency of diesel degradation in vadose zone.The finer particles of the medium,the higher ability of diesel degradation is.It is expressed as： fine sand medium sand coarse sand.Volatilization and biodegradation are important factors in affecting natural attenuation of diesel in vadose zone.

关 键 词：柴油 包气带 深度 含水率 自然衰减 

分 类 号：X523[环境科学与工程—环境工程]