摘要
采用固定床吸附法研究了三氯乙烯(TCE)、1,2-二氯乙烷(DCE)和三氯甲烷(TCM)共3种氯代烃类蒸气在疏水性超高交联吸附树脂LC-1上的动态吸附行为.结果表明,TCE、DCE和TCM蒸气的初始浓度、气体流速和吸附温度均会影响动态吸附过程,随着初始浓度、气体流速和吸附温度的增大,穿透时间变短,传质区长度增大,其中气体流速的影响最大;采用半经验数学模型Yoon-Nelson模型对吸附穿透实验数据进行拟合,拟合相关性系数R2≥0.994.
The dynamic adsorption of trichloroethylene（TCE）,1,2-dichloroethane（DCE） and trichloromethane（TCM） vapors onto hydrophobic hypercrosslinked polymeric resin（LC-1） were investigated using the fixed-bed adsorption method.The results indicated that the breakthrough time decreased and the height of mass transfer zone increased with the elevated initial concentration,gas flow rate and adsorption temperature.The gas flow rate had the wost significant influence on breakthrough time and height of mass transfer zone among the three factors.In addition,a simple semi-empirical mathematic model developed by Yoon and Nelson was applied to investigate the breakthrough behavior,and all correlation coefficients R2 were greater than 0.994.
出处
《环境科学》
EI
CAS
CSCD
北大核心
2011年第9期2805-2809,共5页
Environmental Science
基金
江苏省自然科学基金项目(BK2009247)
国家自然科学基金项目(51078180)
南京大学污染与资源化国家重点实验室开放课题项目(PCRRF09014)
江苏省“青蓝工程”项目
关键词
氯代烃
疏水性超高交联吸附树脂
固定床吸附
传质区长度
穿透时间
Yoon-Nelson模型
chlorinated hydrocarbons（CHCs）
hydrophobic hypercrosslinked polymeric resin
fixed-bed adsorption
height of mass transfer zone
breakthrough time
Yoon and Nelson model
