Spectro-chemical analysis of the speciation of cadmium on montmorillonite in the presence of soil microbial biomass

摘要：

　　Here we report on a spectro-chemical approach to investigate the adsorption of dissolved Cd ions to montmorillonite (M) in the presence of a mixed consortium of soil bacteria.Results indicate that the order of metal-loading was M-microbial complex >microbial biomass > M.Surface interactions of Cd with M-microbial complex have also been confirmed,and we speculate that after binding to M,additional proton binding sites on microbial cells function as binding sites for Cd ions thereby enhancing the metal binding capacity of the mineral.There is also evidence to suggest that hydrogen bonding,cation bridging and ion-exchange are important mechanisms in the adsorption of metal ions to clay-organo complexes.

关键词： Cd-loading interactions montmorillonite M-microbial complex soil microbial biomass speciation

作者: Adrian Spence Claion Robinson

作者单位: International Centre for Environmental and Nuclear Sciences, University of the West Indies, Mona, Kingston 7, Jamaica

会议类型: 国际会议

会议名称: 2013 International Symposium on Environmental Science and Technology(2013环境科学与技术国际会议)

会议地点: 大连

会议语种:英文

页码: 92-100

在线出版日期: 2013-06-04（万方平台首次上网日期，不代表论文的发表时间）