环境中六价铬[Cr(Ⅵ)]的毒性约是三价铬[Cr(Ⅲ)]的100倍,Cr(Ⅵ)不仅对生态环境和人类健康构成严重威胁,还具有很强的致癌性和致突变性,因此,水体Cr(Ⅵ)污染物的治理具有重要意义。磁性生物质炭以其丰富的结合位点、大的比表面积、优良的吸附性能、低成本、高的抗冲击性和耐受性,可用于Cr(Ⅵ)污染水体的修复。综述了磁性生物炭的制备方法,讨论了磁性生物质炭去除水中Cr(Ⅵ)的影响因素,进而分析了磁性生物质炭去除水中 Cr(Ⅵ)的吸附机理。最后,提出了磁性生物质炭在Cr(Ⅵ)污染水体修复中进一步的研究需求和方向,并展望了未来的发展前景和潜力。
The toxicity of hexavalent chromium [Cr(Ⅵ)] in the environment is about 100 times that of trivalent chromium[Cr(Ⅲ)].Cr(Ⅵ) not only poses serious threat to the ecological environment and human health,but also has strong carcinogenicity.And mutagenicity,therefore,the treatment of Cr(Ⅵ) pollutants in water bodies is of great significance.With its abundant binding sites,large specific surface area,excellent adsorption performance,low cost,high impact resistance and tolerance,magnetic biochar can be used for the repair of Cr(Ⅵ) polluted water bodies.The preparation methods of magnetic biochar were reviewed,the factors affecting the removal of Cr(Ⅵ) from water by magnetic biochar were discussed.The adsorption mechanism of the removal of Cr(Ⅵ) from water by magnetic biochar was explored.Finally,the further research needs and directions of magnetic biochar in the restoration of Cr(Ⅵ) polluted water bodies were put forward,and prospected the future development prospects and potentials.
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基金资助
国家自然科学基金(51778524);陕西省教育厅专项科研计划项目(21JK0738);2021年西安建筑科技大学华清学院大学生创新训练项目(S202113679014)
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