摘要
通过静态吸附实验,研究水体中对硝基氯苯在HZSM-5沸石中的吸附和扩散行为。研究结果表明,对硝基氯苯在HZSM-5沸石中的吸附等温线存在2个平台,其最大吸附量与温度无关。对硝基氯苯优先吸附在沸石孔道的交点位置,其吸附过程由内扩散控制。对硝基氯苯在HZSM-5沸石中的扩散性与温度和对硝基氯苯的吸附量密切相关,其扩散系数在高温与吸附量小于2mol/u.c.时较高。
Adsorption and diffusion behaviors of p- chloronitrobenzene（p-CNB） in aqueous solution using HZSM-5 zeolite as the sorbent have been studied through static adsorption experiments. It is observed that the adsorption isotherms for p- CNB in HZSM- 5 zeolite present two-step curves and the maximum adsorption amounts are independent of the temperatures. In addition, it＇ s also found that p - CNB molecule is preferentially adsorbed in the intersections of HZSM-5 zeolite channels and internal diffusion is a crucial factor controlling the diffusion of p- CNB in the zeolite. Diffusion results reveal that the diffusivity of p- CNB in HZSM- 5 zeolite is markedly reliant on the temperature and the adsorbed amount of p- CNB molecule,high adsorption temperature and low adsorption amount is helpful to the diffusion of p- CNB in HZSM-5 zeolite.
出处
《工业水处理》
CAS
CSCD
北大核心
2007年第7期45-47,63,共4页
Industrial Water Treatment
基金
国家自然科学基金项目(10275034)
南京信息工程大学科研启动基金项目(QD054)
