Details

Autor(en) / Beteiligte

• Yu, Run-lan
• Liu, Jing
• Tan, Jian-xi
• Zeng, Wei-min
• Shi, Li-juan
• Gu, Guo-hua
• Qin, Wen-qing
• Qiu, Guan-zhou

Titel

Effect of pH values on the extracellular polysaccharide secreted by Acidithiobacillus ferrooxidans during chalcopyrite bioleaching

Ist Teil von

• International journal of minerals, metallurgy and materials, 2014-04, Vol.21 (4), p.311-316

Ort / Verlag

Beijing: University of Science and Technology Beijing

Erscheinungsjahr

2014

Quelle

Alma/SFX Local Collection

Beschreibungen/Notizen

• The pH value plays an important role in the bioleaching of sulphide minerals. The effect of pH values on the extracellular poly-saccharide secreted by Acidithiobacillus ferrooxidans was investigated in different phases of bacterial growth during chalcopyrite bioleach-ing. It is found that extracellular polysaccharide secretion from the cells attached to chalcopyrite is more efficiently than that of the free cells in the bioleaching solution. Three factors, pH values, the concentration of soluble metal ions, and the bacterial growth and metabolism, affect extracellular polysaccharide secretion in the free cells, and are related to the bacterial growth phase. Extracellular polysaccharide secretion from the attached cells is mainly dependent on the pH value of the bacterial culture.