双酚A在高岭石和蒙脱石悬浮液中的光降解  

Photodegradation of Bisphenol A in Kaolinite and Montmorillonite Suspensions

作　　者：刘延湘[1] 吴峰[2] 邓南圣[2] 

机构地区：[1]江汉大学化学与环境工程学院,湖北武汉430056 [2]武汉大学资源与环境科学学院,湖北武汉430079

出　　处：《武汉大学学报（理学版）》2010年第1期49-53,共5页Journal of Wuhan University:Natural Science Edition

基　　金：国家自然科学基金资助项目(20477031);湖北省科技厅项目(2009CDB159)

摘　　要：选择两种典型的黏土矿物:高岭石和蒙脱石,研究了内分泌干扰物双酚A(BPA)在它们表面的吸附特性及光降解规律.结果表明,BPA在两种黏土矿物表面皆有少量的吸附,符合Langmuir吸附等温式.BPA在两种黏土矿悬浮液中的光降解速度大小顺序为:蒙脱石,高岭石.基于黏土矿物表面形貌的理化分析、颗粒的固体紫外-可见(UV-vis)光谱分析的结果、反应体系中羟基自由基的生成量及铁的形态变化,提出了BPA在两种黏土矿物悬浮液中光降解的可能机制.The photodegradation of bisphenol A （BPA） in two clay minerals such as kaolinite and montmorillonite were investigated. The results show that the adsorption isotherms of BPA onto the clay minerals are fitted to the Langmuir adsorption isothermals, and the adsorption of BPA is low. The rate of photodegradation in the suspensions followed the order： montmorillonite, kaolinite. Based on the results of the surface properties, the UV-vis diffuse reflectance spectra of particles, the concentration change of · OH radicals, and the total iron ions in the process, the proposed mechanism of BPA photochemical oxida- tion was proposed.

关 键 词：双酚A 光降解 高岭石 蒙脱石 机制 

分 类 号：O644.1[理学—物理化学]