【摘要】 通过批式振荡及溶出模拟实验研究了十二烷基硫酸钠（SDS）、吐温80（TW80）及脂肪醇聚氧乙烯醚硫酸钠（AES）对石油污染含水层介质的脱附净化效果,考察了振荡时间、SDS浓度、脱附净化流程等对污染物净化效率的影响。结果表明:SDS对石油污染的脱附净化效果优于TW80及AES,适宜的振荡时间为3 h,适宜的SDS浓度为4.0 g·L^-1;脱附净化流程实验证实,按照流程3(首先采用去离子水脱附,然后采用4.0 g·L^-1的SDS溶液进行脱附,最后采用去离子水脱附)进行脱附净化后,污染物溶出浓度最低,推荐流程3作为适宜的脱附净化流程。经上述推荐的实验条件处理后,含水层介质溶出模拟实验中TPH浓度降低了99%以上,接近地下水质量标准Ⅳ类限值;苯浓度降低超过了87%,低于地下水质量标准Ⅳ类限值,污染含水层环境及人体健康风险大大降低。基于SDS的脱附净化技术是一种有工程应用前景的石油污染含水层介质修复技术。更多还原

【Abstract】 The desorption and purification effects of sodium dodecyl sulfate（SDS）, Tween 80（TW80） and sodium alcohol ether sulphate（AES） on petroleum-contaminated aquifer were investigated by batch test and dissolution simulation test, and the influences of oscillation time, SDS concentration and desorption process on pollutant purification efficiency were investigated. Results showed that SDS was more efficient than TW80 and AES in removing petroleum pollutants. The appropriate oscillation time and SDS concentration were 3 h and 4.0 g · L^-1, respectively. The desorption and purification process experiment confirmed that concentration of pollutants in the dissolution was the lowest when the process 3(desorption with deionized water at first, then desorption with 4.0 g·L^-1 SDS solution, and finally desorption with deionized water) was used for desorption and purification. So the process 3 was recommended as an appropriate desorption and purification process. After treatment with the above recommended experimental conditions, TPH concentration in simulated dissolution test of contaminated aquifer medium decreased by over 99%, which approached the requirements of the standard for groundwater quality（Ⅳ） in China. And the reduction of benzene concentration exceeded 87%, which was lower than the standard for groundwater quality（Ⅳ） in China. After desorbing and purifying, the environment and human health risks caused by the contaminated aquifer were reduced dramatically. Therefore, the desorption and purification technology based on SDS could be a promising remediation technology for petroleum contaminated aquifer medium.更多还原