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| Removal of Polybrominated Diphenyl Ethers in River Sediments by Thalia Dealbata |
| Received:August 14, 2014 |
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| KeyWord:polybrominated diphenyl ethers;phytoremediation;debromination;Thalia dealbata |
| Author Name | Affiliation | E-mail | | YANG Lei-feng | Department of Environmental Engineering, Key Laboratory of Water/Soil Toxic Pollutants Control and Bioremediation of Guangdong Higher Education Institutes, Jinan University, Guangzhou 510632, China | | | YIN Hua | Key Lab of Pollution Control and Ecosystem Restoration in Industry Clusters, College of Environment and Energy, South China University of Technology, Guangzhou 510006, China | huayin@scut.edu.cn | | YE Jin-shao | Department of Environmental Engineering, Key Laboratory of Water/Soil Toxic Pollutants Control and Bioremediation of Guangdong Higher Education Institutes, Jinan University, Guangzhou 510632, China | | | PENG Hui | Department of chemistry, Jinan University, Guangzhou 510632, China | tbpenghui@163.com | | XIE Dan-ping | South China Institute of Environment Sciences, Ministry of Environment Protection, Guangzhou 510656, China | | | LIU Shao-wei | South China Institute of Environment Sciences, Ministry of Environment Protection, Guangzhou 510656, China | |
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| Abstract: |
| Thalia dealbata is a fast-growing and quick-multiplying aquatic plant, and may be used to phytoremediate polybrominated diphenyl ethers(PBDEs) in river sediments. A pot experiment was conducted in a greenhouse to investigate the changes of type and concentration of PBDEs and the microbial activity in sediments under Thalia dealbata. Thalia dealbata significantly enhanced the removal rate of BDE-209 in the sediments. After 390 days, the concentration of BDE-209 in control and treatment reduced to 1.13 mg·kg-1 and 0.97 mg·kg-1 from 1.33 mg·kg-1, respectively, with removal rate increased from 15% to 27%. GC-MS analysis suggested that degradation products of BDE-209 varied from tribromodiphenyl ethers to nonabromodiphenyl ethers such as BDE-207 and BDE-206. The relationship between microbial activity and removal efficiency of BDE-209 in sediments showed that planting Thalia dealbata enhanced microbial activity, and thus accelerated removal of BDE-209. The residual BDE-209 was negatively correlated with microbial activity characterized by FDA. |
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