LEACHING ENVIRONMENTAL RISK EVALUATION OF Pb IN SOLIDIFIED/STABILIZED MUNICIPAL SOLID WASTE INCINERATION FLY ASH UNDER WETTING AND DRYING INTERMITTENT

WU Xiang-yu; WANG Yi-tian; ZHANG Han; XU Hong-yong; CAI Lan-kun

doi:10.13205/j.hjgc.202011022

Volume 38 Issue 11

Apr. 2021

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Article Navigation > ENVIRONMENTAL ENGINEERING > 2020 > 38(11): 135-139

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WU Xiang-yu, WANG Yi-tian, ZHANG Han, XU Hong-yong, CAI Lan-kun. LEACHING ENVIRONMENTAL RISK EVALUATION OF Pb IN SOLIDIFIED/STABILIZED MUNICIPAL SOLID WASTE INCINERATION FLY ASH UNDER WETTING AND DRYING INTERMITTENT[J]. ENVIRONMENTAL ENGINEERING , 2020, 38(11): 135-139. doi: 10.13205/j.hjgc.202011022

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LEACHING ENVIRONMENTAL RISK EVALUATION OF Pb IN SOLIDIFIED/STABILIZED MUNICIPAL SOLID WASTE INCINERATION FLY ASH UNDER WETTING AND DRYING INTERMITTENT

doi: 10.13205/j.hjgc.202011022

State Environmental Protection Key Laboratory of Environmental Risk Assessment and Control on Chemical Process, School of Resources and Environmental Engineering, East China University of Science and Technology, Shanghai 200237, China

Received Date: 2019-11-08
Available Online: 2021-04-23
Publish Date: 2021-04-23

Abstract

Abstract

This study evaluated the environmental risk of lead (Pb) under wetting and drying (W-D) intermittent in fly ash from municipal solid waste incineration (MSWI), co-treated with cement and chelator. The results showed that the mineral composition of the co-treated fly ash kept stable and the hydration degree improved under W-D intermittent. Thus, the environmental risk of Pb got reduced due to the protection by more hydration products. In addition, compared with traditional cement-solidification method, co-treatment was more efficient in stabilizing Pb and easily made Pb meet the standard for pollution control of the landfill site of municipal solid waste (GB 16889—2008); compared with chelator-stabilization, the environmental risk of Pb under W-D intermittent was significantly reduced. Therefore, cement and chelator co-treatment was suitable for the stabilization of Pb in MSWI fly ash in areas with high W-D intermittent incidence.
- heavy metal pollution,
- wetting and drying intermittent,
- fly ash,
- cement-solidification,
- chelator-stabilization

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References

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