title: Immobilization of Acidithiobacillus ferrooxidans on cotton gauze for biological oxidation of ferrous ions in a batch bioreactor.
abstract: The ability of Acidithiobacillus ferrooxidans to oxidize ferrous iron has been extensively studied in bioleaching to recover metal resources. Although immobilization of A. ferrooxidans is of great importance to achieve high bioleaching performance in practical application, the reported approaches of immobilization of A. ferrooxidans are still limited. This paper is attempting to develop a novel method to immobilize A. ferrooxidans by a less-costly effective carrier from zeolite, activated carbon, and cotton gauze. The results showed that cotton gauze was the most suitable carrier to immobilize A. ferrooxidans cells in comparison with zeolite and activated carbon. Acidithiobacillus ferrooxidans immobilized on the cotton gauze by gravity dehydration could achieve an average ferrous iron oxidation rate of 0.73 g/(L·h). Furthermore, the ferrous iron oxidation ratio attained in the bioreactor under batch operation was maintained above 97.83%. All results indicated that cotton gauze could be an efficient carrier for immobilizing A. ferrooxidans cells for the biooxidation of ferrous ions.
authors.affiliation: School of Environment and Energy, Guangzhou Higher Education Mega Centre, South China University of Technology, Guangzhou, People's Republic of China.|The Key Lab of Pollution Control and Ecosystem Restoration in Industry Clusters, Ministry of Education, Guangzhou Higher Education Mega Centre, South China University of Technology, Guangzhou, People's Republic of China.|The Key Laboratory of Environmental Protection and Eco-Remediation of Guangdong Regular Higher Education Institutions, Guangzhou Higher Education Mega Centre, Guangzhou, People's Republic of China.
authors.forename: Nengwu
authors.initials: N
authors.lastname: Zhu
authors.affiliation: School of Environment and Energy, Guangzhou Higher Education Mega Centre, South China University of Technology, Guangzhou, People's Republic of China.
authors.forename: Chaohong
authors.initials: C
authors.lastname: Shi
authors.affiliation: School of Environment and Energy, Guangzhou Higher Education Mega Centre, South China University of Technology, Guangzhou, People's Republic of China.
authors.forename: Ru
authors.initials: R
authors.lastname: Shang
authors.affiliation: The Key Lab of Pollution Control and Ecosystem Restoration in Industry Clusters, Ministry of Education, Guangzhou Higher Education Mega Centre, South China University of Technology, Guangzhou, People's Republic of China.
authors.forename: Chong
authors.initials: C
authors.lastname: Yang
authors.affiliation: School of Environment and Energy, Guangzhou Higher Education Mega Centre, South China University of Technology, Guangzhou, People's Republic of China.
authors.forename: Zhiguo
authors.initials: Z
authors.lastname: Xu
authors.affiliation: School of Environment and Energy, Guangzhou Higher Education Mega Centre, South China University of Technology, Guangzhou, People's Republic of China.|The Key Lab of Pollution Control and Ecosystem Restoration in Industry Clusters, Ministry of Education, Guangzhou Higher Education Mega Centre, South China University of Technology, Guangzhou, People's Republic of China.|The Key Laboratory of Environmental Protection and Eco-Remediation of Guangdong Regular Higher Education Institutions, Guangzhou Higher Education Mega Centre, Guangzhou, People's Republic of China.
authors.forename: Pingxiao
authors.initials: P
authors.lastname: Wu
mesh_terms: D042763:Acidithiobacillus / Q000166:cytology / Q000378:metabolism*; D019149:Bioreactors / Q000382:microbiology*; D018914:Cells, Immobilized / Q000166:cytology / Q000378:metabolism*; D032561:Cotton Fiber; D005296:Ferrous Compounds / Q000737:chemistry / Q000378:metabolism; D007501:Iron / Q000737:chemistry / Q000378:metabolism*; D010084:Oxidation-Reduction; D017641:Zeolites
chemical_list: D005296:Ferrous Compounds; D017641:Zeolites; D007501:Iron
keywords: Acidithiobacillus ferrooxidans; biooxidation; cotton gauze; immobilization