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| Remediation of Cu contaminated soil and microbial community as affected by combining lime with ryegrass |
| Received:October 11, 2016 |
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| KeyWord:lime;ryegrass;remediation;copper;contaminate;Biolog |
| Author Name | Affiliation | E-mail | | DU Zhi-min | Henan Academy of Sciences Institute of Biology, Zhengzhou 450008, China
Key laboratory of Microbial Engineering of Henan Province, Zhengzhou 450008, China | | | GUO Xue-bai | Zhengzhou Technology and Business University, Zhengzhou 450000, China | | | WANG Ji-wen | Henan Academy of Sciences Institute of Biology, Zhengzhou 450008, China
Key laboratory of Microbial Engineering of Henan Province, Zhengzhou 450008, China | | | YUE Dan-dan | Henan Academy of Sciences Institute of Biology, Zhengzhou 450008, China
Key laboratory of Microbial Engineering of Henan Province, Zhengzhou 450008, China | | | ZHOU Jing | Institute of Soil Science, Chinese Academy Sciences, Nanjing 210008, China | | | GONG Tao | Henan Academy of Sciences Institute of Biology, Zhengzhou 450008, China
Key laboratory of Microbial Engineering of Henan Province, Zhengzhou 450008, China | | | YANG Wen-ling | Henan Academy of Sciences Institute of Biology, Zhengzhou 450008, China
Key laboratory of Microbial Engineering of Henan Province, Zhengzhou 450008, China | | | ZHEN Jing | Henan Academy of Sciences Institute of Biology, Zhengzhou 450008, China
Key laboratory of Microbial Engineering of Henan Province, Zhengzhou 450008, China | | | MU Qi | Henan Academy of Sciences Institute of Biology, Zhengzhou 450008, China | | | CHEN Guo-can | Henan Academy of Sciences Institute of Biology, Zhengzhou 450008, China
Key laboratory of Microbial Engineering of Henan Province, Zhengzhou 450008, China | swschenggc@sina.com |
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| Abstract: |
| A pot experiment was set up to test the remediation effects in a Cu contaminated soil by applying of lime(SH1, SH2 and SH3, dosages of 0.1%, 0.2% and 0.4%, respectively) and ryegrass(Secale cereale), according to the determination of growth and Cu accumulation of ryegrass, transformation of Cu speciation in soil, and soil microbial community. The results showed that lime significantly increased biomass and Cu accumulation of ryegrass and soil pH, but decreased Cu concentration of aboveground and root of ryegrass. Compared to control, SH1, SH2 and SH3 decreased exchangeable Cu by 58.47%, 87.51% and 74.54%, while increased carbonate bound Cu to 1.36, 1.93 and 1.56 times than control, respectively. The Biolog analysis at 72 h showed that lime had the ability to increase AWCD(average well color development), S(substrate richness), Shannon's, Simpson, and McIntosh diversity index in the descending order of SH2, SH3, SH1 and CK. Lime changed the carbon source utilization patterns of soil microbial communities obviously. SH2 had the highest level of the carbon source utilization. In conclusion, combining lime of dosage of 0.2% with ryegrass could remediate the Cu contaminated soil. |
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