pH和温度对2,2’,4,4’-四溴联苯醚在土壤中吸附和解吸行为的影响研究  

Effects of pH and temperature on BDE-47 sorption and desorption behaviors onto soil

作　　者：刘世科[1] 刘锐龙[2] 辛佳[3] 刘翔[4] 

机构地区：[1]衡水学院应用化学系,河北衡水053000 [2]北京市燃气集团有限责任公司,北京100035 [3]中国海洋大学环境科学与工程学院,山东青岛266003 [4]清华大学环境学院,北京100084

出　　处：《环境污染与防治》2015年第2期74-77,共4页Environmental Pollution & Control

基　　金：环保公益性行业科研专项(No.201209053)

摘　　要：研究了pH和温度对2，2’，4，4’-四溴联苯醚（BDE-47）在土壤中的吸附和解吸行为的影响。结果表明，pH和温度都可以影响BDE-47在受试土壤中的吸附和解吸行为。pH升高或降低均会使土壤对BDE-47的吸附能力提高，且在碱性环境中提高的程度更大；酸性或碱性条件下BDE-47在土壤中的解吸滞后性显著增强。温度降低后，土壤对BDE-47的吸附能力提高，5℃时的单点分配系数（Kd，表征土壤对BDE-47的吸附能力）是25℃时的1．03～1．67倍；温度由25℃降低到5℃后，BDE-47在土壤中的解吸滞后性增强。This paper studied the effects of pH and temperature on BDE-47 sorption and desorption behaviors on the sampled soil. The results showed that pH and temperature affected the sorption and desorption behaviors of BDE-47 onto the sampled soil. The increase or decrease of pH strengthened the adsorption capacity of BDE-47 on soil, with a larger improvement in alkaline environment. The enhanced desorption hysteresis of BDE-47 were significantly observerd under acidic or alkaline conditions. The adsorption capacity of BDE-47 to soil became stronger when the temperature reduced,and the single point distribution coefficients （K d, a reflection of adsorption capacity of BDE-47 on soil） in 5℃ was 1.03-1.67 times than that in 25℃. The desorption hysteresis of BDE-47 were more obvious in 5℃ than that in 25 ℃.

关 键 词：pH温度 2 2’ 4 4'-四溴联苯醚 土壤 吸附 解吸 

分 类 号：X53[环境科学与工程—环境工程]