CHEN Shu, YANG Yuan-kun, LIAO Guang-dan, SU Tao
(Key Laboratory of Solid Waste Treatment and Resource Recycle, Ministry of Education (Southwest University of Science and Technology), Mianyang 621010, China)
Abstract：Formation of jarosite and its effect on bioleaching of copper from waste printed circuit boards by Acidithiobacillus ferrooxidans were investigated under the bioleaching column condition. The results show that jarosite formed in the bioleaching column is the main factor for the efficiency of copper leached. As the pH value is 2.20, the content of Fe3+ and higher ORP values can be maintained. Meanwhile, the amount of production of jarosite is reduced. When there are bacteria in the column, jarosite can be produced under the control or uncontrolled acids conditions. Low pH value (pH＜2.50) with adding acid can keep bioleaching with relatively low content of jarosite.
Key words：jarosite; Acidithiobacillus ferrooxidans; copper; leaching
ACTA MINERALOGICA SINICA Vol. 34, No. 2, 2014, Page 189-193
