Heavy metal pollution characteristics and environmental risk assessment of the residue after magnetic separation of converter dust in steel plants.

IF 3.8 3区环境科学与生态学 Q3 ENGINEERING, ENVIRONMENTAL

Environmental Geochemistry and Health Pub Date : 2025-09-29 DOI:10.1007/s10653-025-02788-z

Lili Wang, Yuanshun Xu, Houhu Zhang, Lichen Liang, Dong Xu

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引用次数: 0

Abstract

To explore the application pathways of residues after magnetic separation of converter dust (RCD), a comprehensive investigation was conducted on its fundamental properties and environmental risks. The crystalline substances in RCD include KCl, Fe₂O₃, SiO₂, ZnO, and Zn₄Si₂O₇(OH)₂(H₂O), while the organic matter is mainly aromatic compounds with low concentration. The overall order of heavy metal (HM) concentration in RCD is as follows: Zn > Pb > Cr > Ni > Cd > As > Cu > Hg. The results of the improvement of Community Bureau of Reference (BCR) sequential extraction showed that Hg, As, Cd, Cr, Cu, Ni, and Zn in RCD were mainly in the residual fraction. The leaching concentrations of HMs in RCD were far below the identification standards for hazardous waste. Referring to the control limit requirements of HMs (GB 15618-2018), the geological accumulation index (I_geo) of Cd reached 5.27. Meanwhile, the potential ecological hazard coefficient (E_r) values of Hg and Cd were 44.48 and 1740.00, respectively, and the comprehensive potential ecological risk index (RI) value for HMs was 1826.27. This indicated that the ecological risk of HMs in RCD is extremely high and it cannot be used as agricultural land soil. However, the I_geo (< 0), E_r (< 40) and RI (< 150) of HMs of RCD as development land soil were lower, and its ecological risk was slight. RCD had no significant effect on the histopathological changes of mice. The rational use of RCD in production will not cause obvious toxic effects on target animals. Based on risk assessment and safety evaluation, the resource utilization of RCD is controllable, safe and reliable.

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炼钢转炉粉尘磁选后残渣重金属污染特征及环境风险评价

为探索转炉粉尘磁分离后残留物的应用途径，对其基本性质和环境风险进行了全面研究。RCD中的结晶物质主要有KCl、Fe2O3、SiO2、ZnO和Zn4Si2O7(OH)2(H2O)，有机质主要为低浓度芳香族化合物。RCD中重金属（HM）浓度的总体顺序为：Zn > Pb > Cr > Ni > Cd > as > Cu > Hg。社区参考局（Community Bureau of Reference， BCR）序列提取改进结果表明，RCD中Hg、As、Cd、Cr、Cu、Ni和Zn主要存在于残留组分中。RCD中HMs的浸出浓度远低于危险废物识别标准。参照HMs （GB 15618-2018）控制限值要求，Cd地质富集指数（Igeo）达到5.27。Hg和Cd的潜在生态危害系数（Er）分别为44.48和1740.00，hm的综合潜在生态风险指数（RI）为1826.27。这表明RCD土壤有机质的生态风险极高，不能作为农用地土壤利用。然而，Igeo (r)

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来源期刊

Environmental Geochemistry and Health 环境科学-工程：环境

CiteScore

8.00

自引率

4.80%

发文量

279

审稿时长

4.2 months

期刊介绍： Environmental Geochemistry and Health publishes original research papers and review papers across the broad field of environmental geochemistry. Environmental geochemistry and health establishes and explains links between the natural or disturbed chemical composition of the earth’s surface and the health of plants, animals and people. Beneficial elements regulate or promote enzymatic and hormonal activity whereas other elements may be toxic. Bedrock geochemistry controls the composition of soil and hence that of water and vegetation. Environmental issues, such as pollution, arising from the extraction and use of mineral resources, are discussed. The effects of contaminants introduced into the earth’s geochemical systems are examined. Geochemical surveys of soil, water and plants show how major and trace elements are distributed geographically. Associated epidemiological studies reveal the possibility of causal links between the natural or disturbed geochemical environment and disease. Experimental research illuminates the nature or consequences of natural or disturbed geochemical processes. The journal particularly welcomes novel research linking environmental geochemistry and health issues on such topics as: heavy metals (including mercury), persistent organic pollutants (POPs), and mixed chemicals emitted through human activities, such as uncontrolled recycling of electronic-waste; waste recycling; surface-atmospheric interaction processes (natural and anthropogenic emissions, vertical transport, deposition, and physical-chemical interaction) of gases and aerosols; phytoremediation/restoration of contaminated sites; food contamination and safety; environmental effects of medicines; effects and toxicity of mixed pollutants; speciation of heavy metals/metalloids; effects of mining; disturbed geochemistry from human behavior, natural or man-made hazards; particle and nanoparticle toxicology; risk and the vulnerability of populations, etc.