Sb(V)在三种矿物表面的吸附行为  

Adsorption of Antimony(V) on Three Minerals

作　　者：席建红[1,2] 何孟常[1] 林春野[1] 张平[1] 呼丽娟[1] 

机构地区：[1]北京师范大学环境学院水环境模拟国家重点试验室,北京100875 [2]山西大同大学化学与化工学院,山西大同037009

出　　处：《土壤通报》2010年第1期38-42,共5页Chinese Journal of Soil Science

基　　金：国家自然科学基金项目(20777009)资助

摘　　要：用研究了蒙脱土、高岭土和针铁矿在不同的pH与离子强度的介质条件下对Sb(V)的吸附及解吸行为。3种矿物对Sb(V)的吸附能力差别较大,蒙脱土的吸附量远大于针铁矿和高岭土,针铁矿与高岭土的吸附能力相近。pH对Sb(V)在3种矿物表面的吸附行为影响显著。随pH的升高,Sb(V)的吸附均减弱。吸附在高岭土表面的Sb(V)易解吸,而针铁矿和蒙脱土表面的Sb(V)不易解吸。随离子强度升高,高岭土对Sb(V)的吸附减弱;离子强度对Sb(V)在针铁矿和蒙脱土表面吸附的影响较小。The adsorption and desorption of Sb（V） on montmorillonite,kaolinite and goethite were investigated at different pH values and ionic strength.The adsorption capacity of three minerals for Sb（V） had significantly differences.The montmorillonite had much greater Sb（V） adsorption capacity than the other two minerals.The kaolinite and the goethite had the similar adsorption capacity.Results indicated that the adsorption was affected strongly by pH.Sb（V） adsorption decreased with the increase of pH.The desorption of Sb（V） on kaolinite was high,while Sb（V） desorption on the other minerals was low.Sb（V） adsorption on kaolinite decreased with the increase of ionic strength,while the effect of ionic strength on Sb（V） adsorption on the other minerals was slight.

关 键 词：吸附 高岭土 蒙脱土 针铁矿 pH Sb(V) 离子强度 

分 类 号：S153[农业科学—土壤学]