Influence of Inorganic Salts on cadmium Adsorption By Montmorillonite and Illite in alkaline conditions

摘要：

Cadmium adsorption features by montmorillonite and illite in alkaline conditions and the influence of inorganic salts were studied by experiment. The cadmium adsorption equilibrium time was 6 hours when the pH values in initiative solutions were 9, and the adsorption cadmium capacity by montmorillonite and illite was 6.910 mg.g-1 and 6.642 mg.g-1.When there are inorganic salts in the solutions of which the pH values in initiative solutions were 9, cadmium adsorption capacity by montmorillonite and illite changed pronouncedly. Taking chloride for example, the orders of cations influencing on cadmium adsorption effect were NH4 +＞Ca2+＞Na+＞K+＞ Mg2+；Taking sodium salt for example, the influence of anions in alkaline conditions were complicated: Cl-, NO3 -decreased cadmium adsorption capacity while CO3 2-, H2PO4 -, HSO4 2-increased adsorption cadmium capacity by precipitation adsorption.

关键词： Inorganic salts Alkaline Conditions Montmorillonite and illite Cadmium Adsorption

作者: WANG Zu-wei ZENG Xiang-feng YU Xiaoman WEI Dong-Bin

作者单位: Tianjin Key lab.of water environment and water resource College of Urban and Environment Science,Tia China Research Center for Eco-Environmental Sciences,Chinese Academy of Sciences,Beijing 100085,PR C

会议类型: 国际会议

会议名称: The 3rd International Conference on Bioinformatics and Biomedical Engineering(iCBBE 2009)(第三届生物信息与生物医学工程国际会议)

会议地点: 北京

会议语种:英文

页码: 1-4

在线出版日期: 2009-06-11（万方平台首次上网日期，不代表论文的发表时间）