文献类型：期刊文献

英文题名：Macroscopic and microscopic investigation on adsorption of Sr(II) on sericite

作者：Hu, Baowei[1];Hu, Qingyuan[2];Xu, Di[3];Chen, Chengguang[2]

机构：[1]Shaoxing Univ, Sch Life Sci, Huancheng West Rd 508, Shaoxing 312000, Peoples R China;[2]Shaoxing Univ, Yuanpei Coll, Dept Architectural Engn, Shaoxing 312000, Peoples R China;[3]Chinese Acad Sci, Nanjing Inst Geog & Limnol, State Key Lab Lake Sci & Environm, Nanjing 210008, Jiangsu, Peoples R China

年份：2017

卷号：225

起止页码：563

外文期刊名：JOURNAL OF MOLECULAR LIQUIDS

收录：SCI-EXPANDED(收录号：WOS:000392676400069)、、EI(收录号：20165003107248)、Scopus(收录号：2-s2.0-85000903728)、WOS

语种：英文

外文关键词：Radionuclides; Sericite; Surface complexation modeling; Adsorption mechanism

外文摘要：Effect of water chemistry on adsorption of Sr(II) on sericite was investigated by batch techniques. The batch experiments showed that adsorption of Sr(II) on sericite significantly increased with increasing pH from 2.0 to 7.0, and then the high-level adsorption was observed at pH > 7.0. The Sr(II) adsorption remarkably decreased with increasing ionic strength, indicating that outer-sphere surface complexation dominated the Sr(II) adsorption on sericite. The adsorption kinetics and isotherms of Sr(II) on sericite can be satisfactorily fitted by pseudo-second-order and Langmuir model, respectively. As surface complexation modeling analysis, the adsorption mechanism of Sr(II) on sericite was cation exchange and outer-sphere surface complexation at pH < 4.0 and pH > 5.0, respectively. These findings are crucial for the estimation of radionuclides on clay minerals at sub-environments. (C) 2016 Elsevier B.V. All rights reserved.