摘要
采用静态吸附实验方法,研究了吸附时间、溶液p H、吸附剂投加量和溶液初始浓度等因素对凹凸棒石黏土吸附Sr2+、Cs+和Co2+的性能,并通过等温吸附模型拟合对其吸附过程及吸附机理进行了探讨。结果表明:凹凸棒石黏土对Sr2+、Cs+和Co2+的吸附效果依次为Co2+>Cs+>Sr2;Freundlich和D-R等温吸附模型能较好地描述凹凸棒石黏土对Sr2+、Cs+和Co2+的吸附过程,其中,凹凸棒石黏土对Sr2+和Cs+的吸附以物理吸附为主,而凹凸棒石对Co2+的吸附过程以化学吸附为主,并且其吸附方式主要为离子交换的方式发生。
The static adsorption experiments were carried out to investigate the adsorption performance of Strontium,Caesium and Cobalt on attapulgite clay in different adsorption time,p H values,adsorbent dosage and initial concentration,and the adsorption mechanism was also studied by adsorption isotherm equation. The adsorption process of Sr2 ＋,Cs＋and Co2 ＋on attapulgite clay could be well described by Freundlich and D-R isothermal adsorption equation,these results indicated that the adsorption performance of attapulgite clay for Co2 ＋is best,and Cs＋is better than Sr2 ＋,and the adsorption process of Sr2 ＋and Cs＋on attapulgite clay is based principally on physical adsorption. However,the adsorption mechanism of Co2 ＋is chemical adsorption,and the adsorption process is controlled by ion exchange.
出处
《科学技术与工程》
北大核心
2015年第31期234-238,共5页
Science Technology and Engineering
基金
国家自然科学基金(41402248)
四川省教育厅科技创新团队项目(12zd1106)
固体废物处理与资源化教育部重点实验室开放基金(12zxgk11)
非金属复合与功能材料科技部重点实验室开放基金(11zxfk06)
核废物与环境安全国防重点学科实验室团队基金(13zxnk08)
核废物与环境安全四川省协同创新中心预研基金(15yyhk03)
西南科技大学重点科研平台专职科研创新团队基金(14tdhk01)资助
关键词
凹凸棒石黏土
吸附性能
等温吸附模型
吸附机理
锶
铯
钴
attapulgite clay adsorption performance isothermal model adsorption mechanism Sr Cs Co
