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Seasonal Variation of the Mobility and Toxicity of Metals in Beijing’s Municipal Solid Waste Incineration Fly Ash

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  • Hang Zhao

    (Key Laboratory of Solid Waste Treatment and Resource Recycle, Ministry of Education, Southwest University of Science and Technology, Mianyang 621010, China)

  • Yang Tian

    (Key Laboratory of Solid Waste Treatment and Resource Recycle, Ministry of Education, Southwest University of Science and Technology, Mianyang 621010, China)

  • Rong Wang

    (Key Laboratory of Solid Waste Treatment and Resource Recycle, Ministry of Education, Southwest University of Science and Technology, Mianyang 621010, China)

  • Rui Wang

    (Key Laboratory of Solid Waste Treatment and Resource Recycle, Ministry of Education, Southwest University of Science and Technology, Mianyang 621010, China)

  • Xiangfei Zeng

    (Key Laboratory of Solid Waste Treatment and Resource Recycle, Ministry of Education, Southwest University of Science and Technology, Mianyang 621010, China)

  • Feihua Yang

    (State Key Laboratory of Solid Waste Reuse for Building Materials, Beijing Building Materials Academy of Sciences Research, Beijing 100041, China)

  • Zhaojia Wang

    (State Key Laboratory of Solid Waste Reuse for Building Materials, Beijing Building Materials Academy of Sciences Research, Beijing 100041, China)

  • Mengjun Chen

    (Key Laboratory of Solid Waste Treatment and Resource Recycle, Ministry of Education, Southwest University of Science and Technology, Mianyang 621010, China)

  • Jiancheng Shu

    (Key Laboratory of Solid Waste Treatment and Resource Recycle, Ministry of Education, Southwest University of Science and Technology, Mianyang 621010, China)

Abstract

Metal mobility and toxicity of the municipal solid waste incineration (MSWI) fly ash from different seasons in Beijing were studied using leaching toxicity procedures, sequential extraction procedures, and bioavailability procedures. The X-ray diffraction results showed that MSWI fly ash contained CaSO 4 , CaCO 3 , and KCl. The Pb, Zn, and Cd contents of MSWI fly ash were high, especially during autumn, being 42, 77, and 1260 times higher than that of their soil backgrounds, respectively. Leaching toxicity experiments showed that MSWI fly ash is hazardous, since Pb exceeded the maximum threshold (5 mg/L). The main alkali metal ions and anions, heavy metals total content, leaching concentration, chemical speciation, and bioavailability varied seasonally. The Pb and Zn leaching concentrations in summer and autumn were higher than that of the other two seasons. Sequential extraction procedures indicated that Pb, Zn, and Cd showed extremely high metal mobility, i.e., the residual states of Pb and Cd in spring were 5.83% and 1.21%, respectively, and that of Zn in autumn was 10.68%. These results will help industries, governments, and the public better understand the risk of MSWI fly ash and will urge them to pay more attention to preventing harm to the ecosystem and human beings.

Suggested Citation

  • Hang Zhao & Yang Tian & Rong Wang & Rui Wang & Xiangfei Zeng & Feihua Yang & Zhaojia Wang & Mengjun Chen & Jiancheng Shu, 2021. "Seasonal Variation of the Mobility and Toxicity of Metals in Beijing’s Municipal Solid Waste Incineration Fly Ash," Sustainability, MDPI, vol. 13(12), pages 1-13, June.
    • Handle: RePEc:gam:jsusta:v:13:y:2021:i:12:p:6532-:d:570972
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    References listed on IDEAS

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    1. Dou, Xiaomin & Ren, Fei & Nguyen, Minh Quan & Ahamed, Ashiq & Yin, Ke & Chan, Wei Ping & Chang, Victor Wei-Chung, 2017. "Review of MSWI bottom ash utilization from perspectives of collective characterization, treatment and existing application," Renewable and Sustainable Energy Reviews, Elsevier, vol. 79(C), pages 24-38.
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    Cited by:

    1. Yongqi Liang & Jian Tang & Heng Xia & Loai Aljerf & Bingyin Gao & Mulugeta Legesse Akele, 2023. "Three-Dimensional Numerical Modeling and Analysis for the Municipal Solid-Waste Incineration of the Grate Furnace for Particulate-Matter Generation," Sustainability, MDPI, vol. 15(16), pages 1-22, August.

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