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Biochar for the removal of contaminants from soil and water: a review

Biochar (Online), 2022-12, Vol.4 (1), Article 19 [Peer Reviewed Journal]

The Author(s) 2022 ;ISSN: 2524-7972 ;EISSN: 2524-7867 ;DOI: 10.1007/s42773-022-00146-1

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  • Title:
    Biochar for the removal of contaminants from soil and water: a review
  • Author: Qiu, Muqing ; Liu, Lijie ; Ling, Qian ; Cai, Yawen ; Yu, Shujun ; Wang, Shuqin ; Fu, Dong ; Hu, Baowei ; Wang, Xiangke
  • Subjects: Agriculture ; Ceramics ; Composites ; Earth and Environmental Science ; Environment ; Environmental Engineering/Biotechnology ; Fossil Fuels (incl. Carbon Capture) ; Glass ; Natural Materials ; Renewable and Green Energy ; Review ; Soil Science & Conservation
  • Is Part Of: Biochar (Online), 2022-12, Vol.4 (1), Article 19
  • Description: Biochar shows significant potential to serve as a globally applicable material to remediate water and soil owing to the extensive availability of feedstocks and conducive physio-chemical surface characteristics. This review aims to highlight biochar production technologies, characteristics of biochar, and the latest advancements in immobilizing and eliminating heavy metal ions and organic pollutants in soil and water. Pyrolysis temperature, heat transfer rate, residence time, and type of feedstock are critical influential parameters. Biochar’s efficacy in managing contaminants relies on the pore size distribution, surface groups, and ion-exchange capacity. The molecular composition and physical architecture of biochar may be crucial when practically applied to water and soil. In general, biochar produced at relatively high pyrolysis temperatures can effectively manage organic pollutants via increasing surface area, hydrophobicity and microporosity. Biochar generated at lower temperatures is deemed to be more suitable for removing polar organic and inorganic pollutants through oxygen-containing functional groups, precipitation and electrostatic attraction. This review also presents the existing obstacles and future research direction related to biochar-based materials in immobilizing organic contaminants and heavy metal ions in effluents and soil. Graphical Abstract Highlights The synthesis strategies and characteristics of biochar are introduced. The removal of contaminants from soil and water is explicated emphatically. The removal behaviors of heavy metal ions and organics are determined. Mechanisms and influencing factors of pollutant removal by biochar are discussed. Prospects of biochar-based materials for contaminant removal are proposed.
  • Publisher: Singapore: Springer Singapore
  • Language: English
  • Identifier: ISSN: 2524-7972
    EISSN: 2524-7867
    DOI: 10.1007/s42773-022-00146-1
  • Source: Springer Nature OA/Free Journals
    DOAJ Directory of Open Access Journals
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