利用Tween80溶液冲洗修复萘污染地下水模拟实验  

Simulation Experiments of Utilizing Tween80 Solution Flushing Naphthalene from Contaminated Groundwater

作　　者：白静[1] 赵勇胜[1] 陈子方[1] 孙勇军[1] 

机构地区：[1]吉林大学地下水资源与环境教育部重点实验室,长春130021

出　　处：《吉林大学学报（地球科学版）》2013年第2期552-557,共6页Journal of Jilin University：Earth Science Edition

基　　金：国家自然科学基金项目(41272256);吉林大学研究生创新基金资助项目(20121063)

摘　　要：采用Tween80溶液冲洗修复萘污染地下水,分析了Tween80溶液质量浓度和冲洗流速对修复效果的影响,并考察了Tween80溶液对萘的增溶效果及对萘在介质上吸附特性的影响。结果表明:萘和Tween80在中砂介质上的吸附分别符合线性吸附和F型吸附;Tween80增溶萘效果较好,10.0g/LTween80溶液中,萘的表观溶解度达到500mg/L,约为水相饱和溶解度的17倍;确定Tween80洗脱萘的临界解吸质量浓度为2.0g/L;不同质量浓度、不同冲洗流速修复萘污染地下水实验结果表明,10.0g/LTween80溶液、3.0mL/min流速为最佳冲洗修复参数,萘的去除率达到90%以上。Tween80 solution was employed to flush naphthalene contaminated groundwater. Two factors influencing remediation efficiency including Tween80 mass concentration and flush velocity were evaluated. Before the flushing experiments, a series of solubilization and sorption batch experiments were also carried out. Sorption experiments showed that the isotherm of Tween80 was fitted with Freundlich model~ whereas the sorption isotherms of naphthalene were all linear with or without Tween80. Only when TweenS0 mass concentration were greater than 2.0 g/L, the sorbed naphthalene can be desorbed into water. The solubilization experiments data indicated that the solubility of naphthalene in 10. 0 g/L Tween80 solution increased to 500 mg/L, which equals to 17 times of the naphthalene saturation concentration in water. Column experiments demonstrated that the maximum removal efficiency（〉90oz60） was achieved at the conditions with the Tween80 concentration of 10. 0 g/L and flushing flow rate of 3. 0 mL/min.

关 键 词：Tween80 萘 临界解吸浓度 地下水 冲洗流速 质量浓度 

分 类 号：X523[环境科学与工程—环境工程]