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介孔钛硅分子筛的表面化学特征及除铅机制研究
引用本文:徐应明,王榕树.介孔钛硅分子筛的表面化学特征及除铅机制研究[J].环境科学学报,1999,19(5):515-520.
作者姓名:徐应明  王榕树
作者单位:天津大学化工学院化工系,天津,300072
基金项目:国家“863”计划,国家自然科学基金,博士点基金
摘    要:以表面活性剂在水溶液中形成的液晶相为模板剂,考察了钛含量对制备介孔钛硅分子筛性质的影响;应用表面络合反应关系式计算了介孔钛硅分子筛表面络合反应的基本特征参数。研究了溶液pH值、温度等对Pb^2+离子在介孔钛硅分子筛表面吸附的影响;并就Pb^2+离子在介孔钛硅分子筛表面的吸附动力学、吸附等温线和吸附机理进行了探讨。

关 键 词:介孔  钛硅分子筛  动力学  铅净化  吸附机理
收稿时间:1997/11/10 0:00:00
修稿时间:1998/3/22 0:00:00

Surface characteristics and adsorption mechanism of Pb2+ on mesoporous titanosilicate molecular sieve
XU Yingming and WANG Rongshu.Surface characteristics and adsorption mechanism of Pb2+ on mesoporous titanosilicate molecular sieve[J].Acta Scientiae Circumstantiae,1999,19(5):515-520.
Authors:XU Yingming and WANG Rongshu
Affiliation:Department of Chemical Engineering, Tianjin University, Tianjin 300072 and Department of Chemical Engineering, Tianjin University, Tianjin 300072
Abstract:Mesoporous titanosilicate molecular sieve samples in the presence of (CTMA)Br were prepared,and the effect of Si/Ti molar ratio on the characteristics of the samples was investigated.A simplified surface complexation model was used to calculate the conditional binding constants for surface complexation of Pb 2+ on mesoporous titanosilicate molecular sieve.Adsorption characteristics of Pb 2+ on the sample were also studied as a function of pH and temperature.Finally,the dynamics,isotherms and mechanism of the adsorption for Pb 2+ were discussed.
Keywords:mesopore  Ti\|MCM\|41  dynamic  removal of lead  adsorption mechanism  
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