农业环境科学学报2012，Vol.31Issue(6)：1203-1208,6.
河流渗滤系统中BTEX的吸附行为实验模拟研究
Experimental Simulation Study of Adsorption of BTEX in the River Filtration System
摘要
Abstract
River filtration system is a natural purification, which means while the river water passing through the soil and the aquifer material, potential contaminants in the river water are filtered and removed by a series of physical, chemical and biological actions. Based on static adsorption experiments, adsorption kinetic curve and adsorption isotherm of each component of BTEX in three different soil samples were plotted, and some conclusions were obtained as follow. (1 }The results of experiments of adsorption dynamics showed that the adsorption reaction balance could be achieved within 48 hours. (2) Adsorption processes in the silt soil and the fine sand were corresponding with Henry model, namely the adsorption capacity was directly proportional to equilibrium concentration of the solution. While adsorption process in the coarse sand accorded with Langmuir model. (3 )By comparison of the adsorption isotherm and the soil -water partition coefficient Kd of each BTEX component in different soil samples, it was found that the silt soil and the fine sand possessed relatively higher adsorption capacity than that of the coarse sand. The results also showed that the silt soil and fine sand samples displayed the strongest adsorption capacity to Benzene, to Toluene the second, and that to Ethyl-benzene and M-xylene were much weaker.(4 )The retarding factors were relatively high, which showed that the samples of river sediments exhibited quite significant retarding action to BTEX components. BTEX could be removed rather efficiently through adsorption action within a quite high concentration range in the river filtration system.关键词
河流渗滤系统/BTEX/吸附行为/实验模拟Key words
river filtration system/ BTEX/ adsorption/ experimental simulation分类
资源环境引用本文复制引用
马燕,李志萍,粱珂,刘明珠..河流渗滤系统中BTEX的吸附行为实验模拟研究[J].农业环境科学学报,2012,31(6):1203-1208,6.基金项目
国家自然基金项目(40772165) （40772165）
华北水利水电学院高层次人才科研启动金项目 （）
