摘要
考察了模拟常规工艺对水中氯苯的去除效能,测定了粉末炭(PAC)对原水中氯苯的吸附等温线和吸附动力学曲线,并采用Freundlich吸附等温式和假二级动力学模型进行拟合。结果表明,常规工艺难以有效去除水中氯苯;PAC可快速地吸附水中氯苯,5min吸附量可达平衡吸附量的80%以上,30min吸附量可达98%以上。建立了PAC投量与氯苯初始浓度和吸附时间的关系式,并通过小试进行了验证,得出了吸附时间为30min时,不同PAC投量所能处理的原水中氯苯最大浓度。
Bench experiments were carried out to evaluate the removal of chlorobenzene in raw water by conventional water treatment process. And a batch system was applied to study the adsorption equilibrium and kinetics of chlorobenzene（CB）from raw water by powdered activated carbon（PAC）. The experimental data obtained were mathematically modeled with Freundlich and pseudo-second-order kinetic model for the equilibrium isotherm and kinetics, respectively. It is shown that the conventional water treatment process can not remove chlorobenzene from water effectively. PAC can rapidly adsorb chlorobenzene with 80~ and 98~ of the equilibrium adsorption capacity at 5 min and 30 min, respectively. A theoretical formular was established to express the relation of PAC dose to the initial concentration of chlorobenzene and adsorption time, and it was verified by the results of bench experiments. The maximum concentration of chlorobenzene corresponding to different PAC dose was obtained with the adsorption time of 30 min.
出处
《土木建筑与环境工程》
CSCD
北大核心
2011年第5期132-136,共5页
Journal of Civil,Architectural & Environment Engineering
基金
国家863计划项目(2008AA06A414)
国家科技支撑计划项目(2006BAJ08B09)
关键词
氯苯
粉末炭
应急供水工艺
突发污染
吸附
chlorobenzene
powdered activated carbon（PAC）
emergency water treatment process
sudden pollution
adsorption
