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Pollutants’ Release, Redistribution and Remediation of Black Smelly River Sediment Based on Re-Suspension and Deep Aeration of Sediment

Author

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  • Lin Zhu

    (State Key Laboratory of Soil and Sustainable Agriculture Institute of Soil Science, Chinese Academy of Sciences 71 East Beijing Road, Nanjing 210008, China)

  • Xun Li

    (State Key Laboratory of Soil and Sustainable Agriculture Institute of Soil Science, Chinese Academy of Sciences 71 East Beijing Road, Nanjing 210008, China)

  • Chen Zhang

    (State Key Laboratory of Soil and Sustainable Agriculture Institute of Soil Science, Chinese Academy of Sciences 71 East Beijing Road, Nanjing 210008, China)

  • Zengqiang Duan

    (State Key Laboratory of Soil and Sustainable Agriculture Institute of Soil Science, Chinese Academy of Sciences 71 East Beijing Road, Nanjing 210008, China)

Abstract

Heavily polluted sediment is becoming an important part of water pollution, and this situation is particularly acute in developing countries. Sediment has gradually changed from being the pollution adsorbent to the release source and has influenced the water environment and public health. In this study, we evaluated the pollutant distribution in sediment in a heavily polluted river and agitated the sediment in a heavily polluted river to re-suspend it and re-release pollutants. We found that the levels of chemical oxygen demand (COD), NH 4 + -N, total nitrogen (TN), and total phosphorus (TP) in overlying water were significantly increased 60 min after agitation. The distribution of the pollutants in the sediment present high concentrations of pollutants congregated on top of the sediment after re-settling, and their distribution decreased with depth. Before agitation, the pollutants were randomly distributed throughout the sediment. Secondly, deep sediment aeration equipment (a micro-porous air diffuser) was installed during the process of sedimentation to study the remediation of the sediment by continuous aeration. The results revealed that deep sediment aeration after re-suspension significantly promoted the degradation of the pollutants both in overlying water and sediment, which also reduced the thickness of the sediment from 0.9 m to 0.6 m. Therefore, sediment aeration after suspension was efficient, and is a promising method for sediment remediation applications.

Suggested Citation

  • Lin Zhu & Xun Li & Chen Zhang & Zengqiang Duan, 2017. "Pollutants’ Release, Redistribution and Remediation of Black Smelly River Sediment Based on Re-Suspension and Deep Aeration of Sediment," IJERPH, MDPI, vol. 14(4), pages 1-10, April.
    • Handle: RePEc:gam:jijerp:v:14:y:2017:i:4:p:374-:d:94756
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    References listed on IDEAS

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    1. Li Wan & Liang Xu & Yongsheng Fu, 2016. "Contamination and Risk Assessment of Heavy Metals in Lake Bed Sediment of a Large Lake Scenic Area in China," IJERPH, MDPI, vol. 13(7), pages 1-12, July.
    2. P. Rekha & D. S. Suman Raj & C. Aparna & V. Hima Bindu & Y. Anjaneyulu, 2005. "Bioremediation of Contaminated Lake Sediments and Evaluation of Maturity Indicies as Indicators of Compost Stability," IJERPH, MDPI, vol. 2(2), pages 1-12, August.
    3. Nam-Il Won & Ki-Hwan Kim & Ji Hyoun Kang & Sang Rul Park & Hyuk Je Lee, 2017. "Exploring the Impacts of Anthropogenic Disturbance on Seawater and Sediment Microbial Communities in Korean Coastal Waters Using Metagenomics Analysis," IJERPH, MDPI, vol. 14(2), pages 1-17, January.
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    Cited by:

    1. Xiang Luo & Yungui Li & Qingsong Wu & Zifei Wei & Qingqing Li & Liang Wei & Yi Shen & Rong Wang, 2019. "Characteristics of Internal Ammonium Loading from Long-Term Polluted Sediments by Rural Domestic Wastewater," IJERPH, MDPI, vol. 16(23), pages 1-15, November.
    2. Haomiao Cheng & Ling Cheng & Liang Wang & Tengyi Zhu & Wei Cai & Zulin Hua & Yulin Wang & Wenfen Wang, 2019. "Changes of Bacterial Communities in Response to Prolonged Hydrodynamic Disturbances in the Eutrophic Water-Sediment Systems," IJERPH, MDPI, vol. 16(20), pages 1-13, October.
    3. Jiangfan Liu & Xiongzhi Xue, 2018. "River Management for Local Governments in China: From Public to Private," IJERPH, MDPI, vol. 15(10), pages 1-11, October.

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