Solidification behavior and environmental risk assessment of toxic elements on tailings from carbothermic reduction-magnetic separation of lead blast furnace slag
Lead blast furnace slag (LBFS) generated during lead smelting is a hazardous solid waste containing potentially toxic elements (Pb, Zn, As, and Cd) with high mobility and solubility. In this study, a process for the utilization of LBFS by carbothermic reduction-magnetic separation method is proposed...
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University of Belgrade, Technical Faculty, Bor
2023-01-01
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| Series: | Journal of Mining and Metallurgy. Section B: Metallurgy |
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| Online Access: | https://doiserbia.nb.rs/img/doi/1450-5339/2023/1450-53392300031J.pdf |
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| author | Jiang Z.-W. Li M.-T. Wei C. Cao Y.-L. Li X.-B. Deng Z.-G. |
| author_facet | Jiang Z.-W. Li M.-T. Wei C. Cao Y.-L. Li X.-B. Deng Z.-G. |
| author_sort | Jiang Z.-W. |
| collection | DOAJ |
| description | Lead blast furnace slag (LBFS) generated during lead smelting is a hazardous solid waste containing potentially toxic elements (Pb, Zn, As, and Cd) with high mobility and solubility. In this study, a process for the utilization of LBFS by carbothermic reduction-magnetic separation method is proposed. Leaching toxicity and Tessier sequential extraction experiments were conducted on LBFS and magnetic separation tailings (TS), and the environmental risk was evaluated using the risk assessment coding index and potential ecological risk index. The obtained results showed that the potentially toxic elements in the TS were solidified in the spinel phase or silicate phase. In addition, the XRD, SEM-EDS, and FTIR results showed the formation of PbCa2Si3O9, ZnAl2O4, and Ca3(AsO4)2 phases. The leaching concentrations of Pb, Zn, As, and Cd in TS were much lower than the toxicity characteristic leaching procedure (TCLP) and China standard leaching test (CSLT) limits. The results of Tessier sequential extraction procedure confirmed that the proportions of the stable residual state of the potentially toxic elements in TS were significantly higher than in LBFS. Furthermore, the ecological environmental risk level for the TS decreased significantly compared to that of LBFS. |
| format | Article |
| id | doaj-art-bc47c2b937a94384bc77365bbb4ca7e4 |
| institution | Kabale University |
| issn | 1450-5339 2217-7175 |
| language | English |
| publishDate | 2023-01-01 |
| publisher | University of Belgrade, Technical Faculty, Bor |
| record_format | Article |
| series | Journal of Mining and Metallurgy. Section B: Metallurgy |
| spelling | doaj-art-bc47c2b937a94384bc77365bbb4ca7e42025-02-03T06:33:34ZengUniversity of Belgrade, Technical Faculty, BorJournal of Mining and Metallurgy. Section B: Metallurgy1450-53392217-71752023-01-0159336337310.2298/JMMB221022031J1450-53392300031JSolidification behavior and environmental risk assessment of toxic elements on tailings from carbothermic reduction-magnetic separation of lead blast furnace slagJiang Z.-W.0Li M.-T.1Wei C.2Cao Y.-L.3Li X.-B.4Deng Z.-G.5Faculty of Metallurgy and Energy Engineering, Kunming University of Science and Technology, Kunming, China + Hunan Zhongke Electric Co., Ltd, Yueyang, ChinaFaculty of Metallurgy and Energy Engineering, Kunming University of Science and Technology, Kunming, China + State Key Laboratory of Complex Nonferrous Metal Resources Clean Utilization, Kunming University of Science and Technology, Kunming, ChinaFaculty of Metallurgy and Energy Engineering, Kunming University of Science and Technology, Kunming, China + State Key Laboratory of Complex Nonferrous Metal Resources Clean Utilization, Kunming University of Science and Technology, Kunming, ChinaFaculty of Metallurgy and Energy Engineering, Kunming University of Science and Technology, Kunming, ChinaFaculty of Metallurgy and Energy Engineering, Kunming University of Science and Technology, Kunming, China + State Key Laboratory of Complex Nonferrous Metal Resources Clean Utilization, Kunming University of Science and Technology, Kunming, ChinaFaculty of Metallurgy and Energy Engineering, Kunming University of Science and Technology, Kunming, China + State Key Laboratory of Complex Nonferrous Metal Resources Clean Utilization, Kunming University of Science and Technology, Kunming, ChinaLead blast furnace slag (LBFS) generated during lead smelting is a hazardous solid waste containing potentially toxic elements (Pb, Zn, As, and Cd) with high mobility and solubility. In this study, a process for the utilization of LBFS by carbothermic reduction-magnetic separation method is proposed. Leaching toxicity and Tessier sequential extraction experiments were conducted on LBFS and magnetic separation tailings (TS), and the environmental risk was evaluated using the risk assessment coding index and potential ecological risk index. The obtained results showed that the potentially toxic elements in the TS were solidified in the spinel phase or silicate phase. In addition, the XRD, SEM-EDS, and FTIR results showed the formation of PbCa2Si3O9, ZnAl2O4, and Ca3(AsO4)2 phases. The leaching concentrations of Pb, Zn, As, and Cd in TS were much lower than the toxicity characteristic leaching procedure (TCLP) and China standard leaching test (CSLT) limits. The results of Tessier sequential extraction procedure confirmed that the proportions of the stable residual state of the potentially toxic elements in TS were significantly higher than in LBFS. Furthermore, the ecological environmental risk level for the TS decreased significantly compared to that of LBFS.https://doiserbia.nb.rs/img/doi/1450-5339/2023/1450-53392300031J.pdflead blast furnace slagenvironmental riskpotentially toxic elementscarbothermic reductionmagnetic separationleaching toxicity |
| spellingShingle | Jiang Z.-W. Li M.-T. Wei C. Cao Y.-L. Li X.-B. Deng Z.-G. Solidification behavior and environmental risk assessment of toxic elements on tailings from carbothermic reduction-magnetic separation of lead blast furnace slag Journal of Mining and Metallurgy. Section B: Metallurgy lead blast furnace slag environmental risk potentially toxic elements carbothermic reduction magnetic separation leaching toxicity |
| title | Solidification behavior and environmental risk assessment of toxic elements on tailings from carbothermic reduction-magnetic separation of lead blast furnace slag |
| title_full | Solidification behavior and environmental risk assessment of toxic elements on tailings from carbothermic reduction-magnetic separation of lead blast furnace slag |
| title_fullStr | Solidification behavior and environmental risk assessment of toxic elements on tailings from carbothermic reduction-magnetic separation of lead blast furnace slag |
| title_full_unstemmed | Solidification behavior and environmental risk assessment of toxic elements on tailings from carbothermic reduction-magnetic separation of lead blast furnace slag |
| title_short | Solidification behavior and environmental risk assessment of toxic elements on tailings from carbothermic reduction-magnetic separation of lead blast furnace slag |
| title_sort | solidification behavior and environmental risk assessment of toxic elements on tailings from carbothermic reduction magnetic separation of lead blast furnace slag |
| topic | lead blast furnace slag environmental risk potentially toxic elements carbothermic reduction magnetic separation leaching toxicity |
| url | https://doiserbia.nb.rs/img/doi/1450-5339/2023/1450-53392300031J.pdf |
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