2007•Journal of Central South University(Science and Technology)Requires access
Influence of surfactants on leaching of phosphate ore with Acidithiobacillus thiooxidans
Honggang Yang
Open publisher page 3 citations
Abstract
During the leaching of phosphate ore with sulfuric acid produced by the oxidation of reductive sulfur with Acidithiobacillus,different types of Tween surfactants were used to promote the interaction between the bacteria and the ore and to increase the rate of phosphate leached.The effects of the surfactants on the phosphate ore leaching with Acidithiobacillus thiooxidans were evaluated by measuring the pH value of solution,the density of bacteria cell in solution and the rate of phosphate leached.The results show that Tween 20,60 and 80 all can improve the leaching of the ore and the optimal dosages are 10,10 and 100 g/m3,respectively.The effect of Tween 60 is the best with about 15% increase of the rate of phosphate leached with a dosage of 10 g/cm3.