Magnetic biochar for environmental remediation: A review

Yunqiang YI, Zhexi HUANG, Baizhou LU, Jingyi XIAN, Po Keung Eric TSANG, Wen CHENG, Jianzhang FANG, Zhanqiang FANG

Research output: Contribution to journalArticlespeer-review

302 Citations (Scopus)


The difficulty of separating the powdered biochar from the environmental medium may lead to secondary pollution and hinder the large-scale application of biochar as an adsorbent. An effective strategy to solve this bottleneck is to introduce transition metals and their oxides into the biochar matrix, creating easily separable magnetic biochar. Magnetic biochar is also effective for the removal of pollutants from aqueous solution. This review comprises a systematic analysis of 109 papers published in recent years (From 2011 to June 2019), and summarises the synthetic methods and raw materials required for magnetic biochar preparation. The basic physicochemical properties of magnetic biochar are expounded, together with findings from relevant studies, and the application of magnetic biochar as an adsorbent or catalyst in environmental remediation are summarised. Other applications of magnetic biochar are also discussed. Finally, some constructive suggestions are given for the future direction of magnetic biochar research. Copyright © 2019 Elsevier Ltd. All rights reserved.
Original languageEnglish
Article number122468
JournalBioresource Technology
Early online dateNov 2019
Publication statusPublished - 2020


Yi, Y., Huang, Z., Lu, B., Xian, J., Tsang, P. E., Cheng, W., . . . Fang, Z. (2020). Magnetic biochar for environmental remediation: A review. Bioresource Technology, 298. Retrieved from


  • Magnetic biochar
  • Synthesis method
  • Raw materials
  • Heavy metals
  • Organic pollutants


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