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

fYear

2009

fDate

11-13 June 2009

Firstpage

1

Lastpage

4

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;

fLanguage

English

Publisher

ieee

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

Type

conf

DOI

10.1109/ICBBE.2009.5162961

Filename

5162961