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| Phanerochaete chrysosporium and modified activated carbon for dealing with heavy uranium-enriched Lolium perenne residue |
| Received:March 01, 2018 |
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| KeyWord:uranium-enriched Lolium perenne;Phanerochaete chrysosporium;lignim;modified activated carbon |
| Author Name | Affiliation | E-mail | | TIAN Jia | School of Life Science and Engineering, Southwest University of Science and Technology, Mianyang 621010, China
State Defense Key Laboratory of the Nuclear Waste and Enviromental Security, Southwest University of Science and Technology, Mianyang 621010, China | | | WANG Li | School of Life Science and Engineering, Southwest University of Science and Technology, Mianyang 621010, China
State Defense Key Laboratory of the Nuclear Waste and Enviromental Security, Southwest University of Science and Technology, Mianyang 621010, China | | | CHEN Xiao-ming | School of Life Science and Engineering, Southwest University of Science and Technology, Mianyang 621010, China
State Defense Key Laboratory of the Nuclear Waste and Enviromental Security, Southwest University of Science and Technology, Mianyang 621010, China
Sichuan Key Laboratory of Soil Environmental Pollution Control and Remediation, Chengdu 610045, China | cxmhyx99@163.com | | ZHANG Xiang-hui | School of Life Science and Engineering, Southwest University of Science and Technology, Mianyang 621010, China
State Defense Key Laboratory of the Nuclear Waste and Enviromental Security, Southwest University of Science and Technology, Mianyang 621010, China | | | QI Xin | School of Life Science and Engineering, Southwest University of Science and Technology, Mianyang 621010, China
State Defense Key Laboratory of the Nuclear Waste and Enviromental Security, Southwest University of Science and Technology, Mianyang 621010, China | | | XIAO Shi-qi | School of Life Science and Engineering, Southwest University of Science and Technology, Mianyang 621010, China
State Defense Key Laboratory of the Nuclear Waste and Enviromental Security, Southwest University of Science and Technology, Mianyang 621010, China | | | JING Lu-huai | School of Life Science and Engineering, Southwest University of Science and Technology, Mianyang 621010, China
State Defense Key Laboratory of the Nuclear Waste and Enviromental Security, Southwest University of Science and Technology, Mianyang 621010, China | | | YAN Ting-ting | School of Life Science and Engineering, Southwest University of Science and Technology, Mianyang 621010, China
State Defense Key Laboratory of the Nuclear Waste and Enviromental Security, Southwest University of Science and Technology, Mianyang 621010, China | | | LUO Xue-gang | School of Life Science and Engineering, Southwest University of Science and Technology, Mianyang 621010, China
State Defense Key Laboratory of the Nuclear Waste and Enviromental Security, Southwest University of Science and Technology, Mianyang 621010, China | |
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| Abstract: |
| In order to determine the optimal processing conditions and solve the resources utilization for the biological pretreatment of uranium-enriched Lolium perenne, the residue obtained by Thiobacillus ferrooxidans treatment of Lolium perenne was used as the raw material in this study. The degradation of Lolium perenne residue by inoculation with 10% Phanerochaete chrysosporium under different solid-liquid ratios of Lolium perenne residues and LM2 medium was investigated. The results showed that degradation for 50 days at the solid-liquid ratio of 1:11 was optimal. This treatment could further degrade 37.78% cellulose, 42.87% hemicellulose, and 54.05% lignin in the Lolium perenne residue, and the total degradation rates of cellulose, hemicellulose, and lignin of Lolium perenne were 88.37%, 89.89%, and 66.01% respectively. In addition, the total weightlessness rate and total uranium-leaching rate of Lolium perenne were 49.70% and 85.48%, respectively. The effects of factors such as dosage, pH value, temperature, and time on the adsorption of uranium in liquid wastes were investigated in nitric acid-modified activated carbon. The results showed that the adsorption rate and the adsorption capacity of modified activated carbon were 93.62% and 0.22 mg·g-1, respectively, under the optimal adsorption condition. After two steps of microbial pretreatment, it could decrease the lignin content in the uranium-enriched Lolium perenne, and the uranium was effectively leached from the solid into the liquid. It could achieve the decrements and harmless of uranium-enriched Lolium perenne to a certain extent, which is of great significance for further utilization of Lolium perenne. Furthermore, this research provides a theoretical basis for the study of microbial pretreatment of heavy metal-enriched biomass. |
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