Recent progresses, challenges, and opportunities of carbon-based materials applied in heavy metal polluted soil remediation

• Published in: The Science of the total environment Vol. 856; p. 158810
• Main Authors: Fu, Tianhong, Zhang, Baige, Gao, Xing, Cui, Shihao, Guan, Chung-Yu, Zhang, Yujin, Zhang, Bangxi, Peng, Yutao
• Format: Journal Article
• Language: English
• Published: Elsevier B.V 15.01.2023
• Subjects: Carbon-based materials; Heavy metal; Influencing factors; Interaction mechanisms; Soil remediation; Soil remediation; Interaction mechanisms; Influencing factors; Carbon-based materials; Heavy metal
• ISSN: 0048-9697; 1879-1026
• DOI: 10.1016/j.scitotenv.2022.158810

The application of carbon-based materials (CBMs) for heavy metal polluted soil remediation has gained growing interest due to their versatile properties and excellent remediation performance. Although the progresses on applications of CBMs in removing heavy metal from aqueous solution and their corresponding mechanisms were well known, comprehensive review on applications of CBMs in heavy metal polluted soil remediation were less identified. Therefore, this review provided insights into advanced progresses on utilization of typical CBMs including biochar, activated carbon, graphene, graphene oxide, carbon nanotubes, and carbon black for heavy metal polluted soil remediation. The mechanisms of CBM remediation of heavy metals in soil were summarized, mainly including physical adsorption, precipitation, complexation, electrostatic interaction, and cationic-π coordination. The key factors affecting the remediation effect include soil pH, organic matter, minerals, microorganisms, coexisting ions, moisture, and material size. Disadvantages of CBMs were also included, such as: potential health risks, high cost, and difficulty in achieving co-passivation of anions and cations. This work will contribute to our understanding of current research advances, challenges, and opportunities for CBMs remediation of heavy metal-contaminated soils. [Display omitted] •Progresses and prospects on carbon-based materials for metal(loid)s polluted soil remediation were discussed.•Fully introduced the key factors affecting the passivation of soil heavy metals by carbon-based materials•Interactions between carbon-based materials and heavy metals in soil condition were summarized.