Title :
Influence of Inorganic Salts on Cadmium Adsorption By Montmorillonite and Illite in Alkaline Conditions
Author :
Wang Zu-wei ; Zeng Xiang-feng ; Yu Xiaoman ; Wei Dong-Bin
Author_Institution :
Tianjin Key Lab. of water Environ. & water resource, Tianjin Normal Univ., Tianjin, China
Abstract :
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.
Keywords :
adsorption; cadmium; clay; environmental factors; minerals; pollution control; soil pollution; Cd; alkaline conditions; cadmium adsorption equilibrium time; chlorides; illite cadmium adsorption capacity; inorganic salt effects; montmorillonite cadmium adsorption capacity; precipitation adsorption; Biological materials; Cadmium compounds; Chemicals; Composite materials; Ocean temperature; Oscillators; Sea surface; Soil; Thermostats; Water resources;
Conference_Titel :
Bioinformatics and Biomedical Engineering , 2009. ICBBE 2009. 3rd International Conference on
Conference_Location :
Beijing
Print_ISBN :
978-1-4244-2901-1
Electronic_ISBN :
978-1-4244-2902-8
DOI :
10.1109/ICBBE.2009.5162961
