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Rapid control of black and odorous substances from heavilypolluted sediment by oxidation:Efficiency and effects

Frontiers of Environmental Science & Engineering 2019年第6期13卷 91-101页

作者： Kun Li Min Yang Jianfeng Peng Ruiping Liu Tista Prasai Joshi Yaohui Bai Huijuan Liu Key Laboratory of Drinking Water Science and Technology Research Center for Eco-Environmental SciencesChinese Academy of SciencesBeijing 100085China University of Chinese Academy of Sciences Beijing 100039China Center for Water and Ecology State Key Joint Laboratory of Environment Simulation and Pollution ControlSchool of EnvironmentTsinghua UniversityBeijing 100084China Nepal Academy of Science and Technology KhumaltarLalitpur 44700Nepal

The control ofblack and odorous substances in sediments is of crucial importance to improve the urban ecological landscape and to restore water environments *** this study,chemical oxidation by the oxidants NaClO,H2O2,and KMnO4 was proposed to achieve rapid control of black and odorous substances in heavily-polluted *** indicate that NaClO and KMnO4 are effective at removing Fe(II)and acid volatile *** removal efficiencies of Fe(II)and AVS were determined to be 45.2%,94.1%,and 93.7%,89.5%after 24-h exposure to NaClO and KMnO4 at 0.2 mmol/g,***,rapid oxidation might accelerate the release of pollutants from *** release of organic matters and phosphorus with the maximum ratios of 22.1%and 51.2%was observed upon NaClO oxidation at 0.4 mmol/***,the introduction of oxidants contributed to changes in the microbial community composition in *** oxidation by NaClO and KMnO4 at 0.4 mmol/g,the Shannon index decreased from 6.72 to 5.19 and 4.95,whereas the OTU numbers decreased from 2904 to 1677 and 1553,***,H2O2 showed a lower effect on the removal of black and odorous substances,pollutant release,and changes in sediment *** study illustrates the effects of oxidant addition on the characteristics of heavily polluted sediments and shows that chemical oxidants may be an option to achieve rapid control of black and odorous substances prior to remediation of water environments.

关键词： Oxidants Heavily polluted sediment black and odorous substances Release behaviors Microorganism

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