Passivation effects of different ratios of fly ash and straw on heavy metals in coal gangue-contaminated soil in Guizhou Province, China
Rattachement africain : cn, gb. Niveau de preuve : code pays fourni par la source.
Le résumé fourni par la source
To simultaneously achieve the stabilization of heavy metals in coal gangue- contaminated soil and the resource utilization of solid waste, fly ash (FA) and corn straw (CS) were adopted as passivators to construct a low-cost and sustainable remediation system. Through pot experiments, FA, CS and their mixture (FC) (mass ratio 1:1) with different addition ratios (1, 3, 6%) were applied to contaminated soil, and ryegrass was planted to evaluate the passivation effect. By analyzing the morphological transformation of heavy metals and their accumulation in plants, the passivation effects on various heavy metals were evaluated. Results showed that FA converted exchangeable iron (Fe), copper (Cu), zinc (Zn) and cadmium (Cd) to a residual state, and CS reduced the reducible Cu and Zn concentrations. The FC transformed Fe, manganese (Mn), lead (Pb) and Cd from exchangeable and reducible states to oxidizable and residual states. At the 6% addition rate, the passivation efficiencies of FC for Fe, Mn, Pb and Cd reached 34.33, 9.98, 14.92 and 17.32%, respectively. Meanwhile, FC inhibited the enrichment of Cu, Zn, Pb, and Cd in ryegrass. Research indicates that FC is more conducive to passivating heavy metals in gangue-contaminated soil, with a 6% mixture ratio being the optimal recommended proportion.
Ce résumé expose les affirmations des auteurs. BNTIC ne l’interprète pas comme une validation indépendante des résultats.
Le contrôle bibliographique ouvert
DOI retrouvé dans Crossref DOI retrouvé ; titre concordant.
- Titre Crossref
- Passivation effects of different ratios of fly ash and straw on heavy metals in coal gangue-contaminated soil in Guizhou Province, China
- Date Crossref
- 31/05/2025
- Éditeur
- Informa UK Limited
- Type
- journal-article
Ce recoupement confirme des métadonnées liées au DOI. Il ne confirme ni la méthode ni les conclusions de l’étude, et il ne compte pas comme une seconde source scientifique indépendante.
Où se fait cette recherche
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Guizhou Education University Guizhou Provincial Key Laboratory of Geographic State Monitoring of Watershed pays non établi dans la noticeUniversité ou école supérieure
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Watershed pays non établi dans la noticeEntreprise
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Guizhou University pays non établi dans la noticeUniversité ou école supérieure
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Chongqing Institute of Geology and Mineral Resources pays non établi dans la noticeStructure de recherche
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School of Geography and Resources pays non établi dans la noticeUniversité ou école supérieure
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Chongqing Key Laboratory of Exogenous Minerals and Mine Environment pays non établi dans la noticeStructure de recherche
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College of Resources and Environmental Engineering pays non établi dans la noticeUniversité ou école supérieure
Guizhou Provincial Key Laboratory of Geographic State Monitoring of Watershed — Guizhou Education University, Watershed et Guizhou University, avec 4 autres affiliations.
Une affiliation ne permet pas de déduire la nationalité d’un auteur.