Leaching behavior of heavy metals from broken ton bags filled with fly ash in acid rain environment

被引：0

作者：

Li W. ^{[1
,2
]}

Yu Q. ^{[1
]}

Yin J. ^{[1
]}

Wu Y. ^{[1
]}

Sun Y. ^{[1
]}

Wang Y. ^{[1
]}

Wang H. ^{[1
]}

Yang Y. ^{[2
]}

Long Y. ^{[3
]}

Huang Q. ^{[2
]}

Ge Y. ^{[1
]}

He Y. ^{[1
]}

Zhao L. ^{[1
]}

机构：

[1] Qingdao Solid Waste Pollution Control and Resource Engineering Research Center, School of Environmental and Municipal Engineering, Qingdao University of Technology, Shandong, Qingdao

[2] State Environmental Protection Key Laboratory of Hazardous Waste Identification and Risk Control, Chinese Research Academy of Environmental Sciences, Beijing

[3] Zhejiang Provincial Key Laboratory of Solid Waste Treatment and Recycling, College of Environmental Science and Engineering, Zhejiang Gongshang University, Zhejiang, Hangzhou

来源：

Huagong Jinzhan/Chemical Industry and Engineering Progress | 2023年 / 42卷 / 09期

关键词：

acid rain; broken ton bag; fly ash landfill; heavy metal leaching; seepage path;

D O I：

10.16085/j.issn.1000-6613.2022-1857

中图分类号：

学科分类号：

摘要：

The column leaching experiment of stabilized fly ash was established by simulating acid rain with “sulfuric acid + nitric acid” extractant to study the influence of acid rain seepage path on the leaching behavior of heavy metals in fly ash under the condition of damaged fly ash ton bags in the landfill. The results showed that the six seepage paths all promoted the leaching of Pb, Zn, Cu, Cd, Cr and Ni in stabilized fly ash to varying degrees. Compared with the horizontal seepage path of “upper left inflow-lower right outflow”, the vertical seepage path of “upper inflow - lower outflow” was more likely to promote the leaching of heavy metals in fly ash due to the double influence of gravity potential energy and matrix potential. Under the mode of “dynamic scouring + static soaking + dynamic scouring”, the cumulative leaching amount of heavy metals was higher. Under the seepage path of “upper left inflow-upper right outflow”, the fluctuation of pH of leachate was the smallest, the cumulative leaching amount of heavy metals was the lowest, and the stability of heavy metals in fly ash matrix was the best. The research results could provide a scientific basis for the evaluation of the leaching behavior of heavy metals from stabilized fly ash in extreme acid rain environment and the environmental risk management and control when the fly ash ton bag in the actual landfill was damaged. © 2023 Chemical Industry Press. All rights reserved.

引用

页码：4917 / 4928

页数：11

共 39 条

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