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Removal of phthalic acid diesters through a municipal solid waste landfill leachate treatment process

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Abstract

We studied the removal of two phthalic acid diesters (PAEs), di-n-butyl phthalate (DBP) and di(2-ethylhexyl) phthalate (DEHP), from leachates of a municipal solid waste landfill treatment facility. The leachates originated from the adjusting unit, the anaerobic unit, the aerobic unit, the ultrafiltration membrane unit, and the reverse osmosis membrane unit. The initial concentrations of DBP and DEHP were 225.8 and 260.9 µg/L, respectively, which were reduced to 5.8 and 3.2 µg/L in the effluent, representing 97.4% removal of DBP and 98.8% removal of DEHP. DBP was removed stepwise during the process, mainly via degradation by microorganisms. Approximately, 70.1% of the DEHP was removed by the membrane processes, owing to physical retention of the compound by the membranes. The dissolved organic carbon occurred mostly in the 1–100 kDa molecular weight fraction. The positive correlation between dissolved organic carbon and DBP/DEHP concentrations in raw leachate and in effluents from each treatment unit showed that the interaction between dissolved organic matter and PAEs facilitated the removal of organic pollutants. Large amounts of PAEs can accumulate over long periods of time in the concentrated leachate product, which may make further leachate treatment more difficult and may lead to adverse impacts on the environment.

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Acknowledgements

This work was funded by the National Natural Science Foundation of China (51678531), Innovative Team Foundation of Zhejiang Province (2013TD12), International Science and Technology Cooperation Program of China (2014DFE90040), and the Significant Science and Technology Project of Zhejiang Province (2015C33006). The authors appreciate the valuable comments from anonymous reviewers.

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Authors and Affiliations

  1. Key Laboratory of Recycling and Eco-treatment of Waste Biomass of Zhejiang Province, Zhejiang University of Science and Technology, Hangzhou, 310023, China

    Chengran Fang, Yixuan Chu, Lanhui Jiang & Hua Wang

  2. Zhejiang Provincial Key Laboratory of Solid Waste Treatment and Recycling, School of Environmental Science and Engineering, Zhejiang Gongshang University, Hangzhou, 310018, China

    Yuyang Long & Dongsheng Shen

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  1. Chengran Fang
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  2. Yixuan Chu
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  3. Lanhui Jiang
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  4. Hua Wang
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  5. Yuyang Long
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  6. Dongsheng Shen
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Correspondence to Chengran Fang.

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Fang, C., Chu, Y., Jiang, L. et al. Removal of phthalic acid diesters through a municipal solid waste landfill leachate treatment process. J Mater Cycles Waste Manag 20, 585–591 (2018). https://doi.org/10.1007/s10163-017-0625-1

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  • DOI: https://doi.org/10.1007/s10163-017-0625-1

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