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Environmental remediation potential of a pioneer plant (Miscanthus sp.) from abandoned mine into biochar: Heavy metal stabilization and environmental application

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Title: Environmental remediation potential of a pioneer plant (Miscanthus sp.) from abandoned mine into biochar: Heavy metal stabilization and environmental application
Authors: Li, Xiao, Lin, Shukun, Ouvrard, Stéphanie, Sirguey, Catherine, Qiu, Rongliang, Wu, Bohan
Contributors: Botran, Lucy, Guangdong Provincial Key Laboratory of Agricultural & Rural Pollution Abatement and Environmental Safety, Laboratoire Sols et Environnement (LSE), Université de Lorraine (UL)-Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE), School of Environmental Science and Engineering Sun Yat-sen University, Sun Yat-sen University Guangzhou (SYSU), National Natural Science Foundation of China (NSFC) Grant number: 41920104003 - 42307485, Research Fund of Maoming Branch, Guangdong Laboratory for Lingnan Modern Agriculture Grant number: 2022ZD001, Heyuan Branch, Guangdong Laboratory for Lingnan Modern Agriculture Project Grant number: DT20220002
Source: Journal of Environmental Management. 366:121751
Publisher Information: Elsevier BV, 2024.
Publication Year: 2024
Subject Terms: [SDE] Environmental Sciences, MESH: Charcoal* / chemistry, [SDV]Life Sciences [q-bio], [SDV.SA.SDS]Life Sciences [q-bio]/Agricultural sciences/Soil study, Mining, Environmental, MESH: Biomass, Metals, Heavy, Soil Pollutants, Biomass, [SDV.SA.SDS] Life Sciences [q-bio]/Agricultural sciences/Soil study, Heavy, Environmental Restoration and Remediation, MESH: Metals, Environment risk, [SDV] Life Sciences [q-bio], Phytoremediation residue, Biodegradation, Environmental, Heavy metals, Charcoal, [SDE]Environmental Sciences, MESH: Mining, MESH: Biodegradation, MESH: Soil Pollutants / chemistry, Adsorption, MESH: Adsorption, MESH: Environmental Restoration and Remediation* / methods, Pyrolysis
Description: Pyrolysis stands out as an effective method for the disposal of phytoremediation residues in abandoned mines, yielding a valuable by-product, biochar. However, the environmental application of biochar derived from such residues is limited by the potential environmental risks of heavy metals. Herein, Miscanthus sp. residues from abandoned mines were pyrolyzed into biochars at varied pyrolysis temperatures (300-700 °C) to facilitate the safe reuse of phytoremediation residues. The results showed that pyrolysis significantly stabilizes heavy metals in biomass, with Cd exhibiting the most notable stabilization effect. Acid-soluble/exchangeable and reducible fractions of Cd decreased significantly from 69.91 % to 2.52 %, and oxidizable and residue fractions increased approximately 3.24 times at 700 °C. The environmental risk assessment indicated that biochar pyrolyzed over 500 °C pose lower environmental risk (RI
Document Type: Article
Language: English
ISSN: 0301-4797
DOI: 10.1016/j.jenvman.2024.121751
Access URL: https://pubmed.ncbi.nlm.nih.gov/38972191
https://hal.inrae.fr/hal-04842770v1
https://doi.org/10.1016/j.jenvman.2024.121751
Rights: Elsevier TDM
Accession Number: edsair.doi.dedup.....741939dec716963538b76fd19f04df1b
Database: OpenAIRE
Description
Abstract:Pyrolysis stands out as an effective method for the disposal of phytoremediation residues in abandoned mines, yielding a valuable by-product, biochar. However, the environmental application of biochar derived from such residues is limited by the potential environmental risks of heavy metals. Herein, Miscanthus sp. residues from abandoned mines were pyrolyzed into biochars at varied pyrolysis temperatures (300-700 °C) to facilitate the safe reuse of phytoremediation residues. The results showed that pyrolysis significantly stabilizes heavy metals in biomass, with Cd exhibiting the most notable stabilization effect. Acid-soluble/exchangeable and reducible fractions of Cd decreased significantly from 69.91 % to 2.52 %, and oxidizable and residue fractions increased approximately 3.24 times at 700 °C. The environmental risk assessment indicated that biochar pyrolyzed over 500 °C pose lower environmental risk (RI
ISSN:03014797
DOI:10.1016/j.jenvman.2024.121751