生物炭/铁复合材料的制备及其在环境修复中的应用研究进展

Preparation of biochar/iron composite and its application in environmental remediation

生物炭/铁复合材料(比如生物炭/纳米零价铁(nZVI),生物炭/硫化亚铁和生物炭/氧化铁),由于其优异的理化性质而被广泛应用于环境污染修复.本文首先总结了生物炭/铁复合材料的制备方法和表征手段,制备方法主要有热解法,水热碳化,沉淀和球磨法等.其次,通过综述生物炭/铁复合材料在有机污染和无机污染修复中的应用,阐明生物炭/铁复合材料的在环境修复中的应用机制以及复合材料中铁与生物炭的协同作用机理.总体而言,由于铁和生物炭之间的协同作用,提高了复合材料的比表面积,官能团和电子传递效率,从而增强生物炭/铁复合材料的性能.最后,提出了未来生物炭/铁复合材料的研究方向,进一步推动生物炭/铁复合材料在环境修复中的应用.

Biochar/iron composites(such as biochar/nano zero-valent iron(nZVI),biochar/iron sulfide,and biochar/iron oxide)have been widely used in environmental remediation due to their excellent physicochemical properties.This paper first summarizes the preparation and characterization methods of biochar/iron composites.The preparation methods mainly include pyrolysis,hydrothermal carbonization,precipitation,ball milling and so on.Secondly,by reviewing the application of biochar/iron composites in organic and inorganic contaminants remediation,the application mechanism of biochar/iron composites in environmental remediation and the synergistic mechanism of iron and biochar in composites were clarified.In general,due to the synergistic effect of biochar and iron,the specific surface area,functional group,and electron transfer efficiency of the composite were improved,thereby enhancing the performance of the biochar/iron composite.Finally,the future research directions of biochar/iron composites were proposed to further promote the application of biochar/iron composites in environmental remediation.