Bioleaching waste printed circuit boards by Acidithiobacillus ferrooxidans and its kinetics aspect.
In this paper, H(+) consumption and metal recovery, during the process of bioleaching waste printed circuit boards (WPCBs) by Acidithiobacillus ferrooxidans (A. ferrooxidans), were discussed in detail. When the WPCBs concentration was 15g/L, Cu (96.8%), Zn (83.8%), and Al (75.4%) were recovered after 72h by A. ferrooxidans. Experimental results indicated that metal recovery rate was significantly influenced by acid. Based on experimental results, the kinetics of the H(+) consumption and metal recovery on bioleaching WPCBs were represented by reaction kinetic equations. The kinetic of H(+) consumption could be described by the second-order kinetic model. The metal recovery belongs to the second-order model with adding acid, which was changed to the shrinking core model with precipitate production.
Key Laboratory of Solid Waste Treatment and Resource Recycle, Ministry of Education, Southwest University of Science and Technology, Mianyang 621010, China.
Yuankun
Y
Yang
Key Laboratory of Solid Waste Treatment and Resource Recycle, Ministry of Education, Southwest University of Science and Technology, Mianyang 621010, China. Electronic address: crick_chen@hotmail.com.
Shu
S
Chen
Institute of Nuclear Physics and Chemistry, China Academy of Engineering Physics, Mianyang 621900, China.
Shicheng
S
Li
Key Laboratory of Solid Waste Treatment and Resource Recycle, Ministry of Education, Southwest University of Science and Technology, Mianyang 621010, China.
Mengjun
M
Chen
Key Laboratory of Solid Waste Treatment and Resource Recycle, Ministry of Education, Southwest University of Science and Technology, Mianyang 621010, China.
Haiyan
H
Chen
Institute of Nuclear Physics and Chemistry, China Academy of Engineering Physics, Mianyang 621900, China.
Bijun
B
Liu
D042763:Acidithiobacillus / Q000378:metabolism*; D000535:Aluminum / Q000378:metabolism; D001673:Biodegradation, Environmental; D003300:Copper / Q000378:metabolism; D055615:Electrical Equipment and Supplies / Q000382:microbiology*; D006859:Hydrogen / Q000378:metabolism*; D007220:Industrial Waste; D007700:Kinetics; D008670:Metals / Q000378:metabolism*; D015032:Zinc / Q000378:metabolism
D007220:Industrial Waste; D008670:Metals; D003300:Copper; D006859:Hydrogen; D000535:Aluminum; D015032:Zinc
Acidithiobacillus ferrooxidans; Bioleaching; H(+) consumption; Metal recovery; Waste printed circuit boards