Title

Experimental measurements of short-term adsorption of Acidithiobacillus ferrooxidans onto chalcopyrite

Document Type

Article

Publication details

Wang, Z, Xie, X & Liu, J 2012, 'Experimental measurements of short-term adsorption of Acidithiobacillus ferrooxidans onto chalcopyrite', Transactions of Nonferrous Metals Society of China, vol. 22, no. 2, pp. 442-446.

Published version available from:

http://dx.doi.org/10.1016/S1003-6326(11)61196-5

Peer Reviewed

Peer-Reviewed

Abstract

The influencing factors in adsorption such as adsorption time, pulp concentration, bacterial concentration, pH as well as ionic strength were investigated to explore the relationship among them and bacterial adsorption. The adsorption was a rapid process for bacterial adhesion to chalcopyrite. The extent of adsorption increased with increasing initial bacterial concentration and pulp concentration. The optimal pH for Acidithiobacillus ferrooxidans adsorption onto chalcopyrite surfaces was in the range of pH 1-3. The increase of ionic strength led to decrease in bacterial adsorption, which can be well explained by electric double layer theory. The adsorption behavior appeared to be controlled by both hydrophobic and electrostatic interactions at the interface of bacteria and mineral.