Cr(VI) reduction by Pseudomonas aeruginosa immobilized in a polyvinyl alcohol/sodium alginate matrix containing multi-walled carbon nanotubes |
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Authors: | Pang Ya Zeng Guang-Ming Tang Lin Zhang Yi Liu Yuan-Yuan Lei Xiao-Xia Wu Meng-Shi Li Zhen Liu Can |
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Institution: | College of Environmental Science and Engineering, Hunan University, Changsha 410082, China. |
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Abstract: | Pseudomonas aeruginosa (P. aeruginosa) was immobilized with polyvinyl alcohol (PVA), sodium alginate and multiwalled carbon nanotubes (MCNTs). After immobilization, the beads were subjected to freeze-thawing to enhance mechanical strength. When exposed to 80 mg/L Cr(VI), the immobilized bacteria were able to reduce 50% of them in 84 h, however the free cells were deactivated at this concentration. The beads were used to reduce 50 mg/L Cr(VI) for nine times, with the reduction efficiency above 90% in the first five times and 65% in the end. |
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Keywords: | Immobilized microorganism MCNTs Pseudomonas aeruginosa Cr(VI) reduction |
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