生物质炭修复重金属及有机物污染土壤的研究进展

生物质炭是生物质原料在完全或部分缺氧条件下高温热解后的固体产物，它具有丰富的孔隙结构和较高的碳含量。该物质具有巨大的表面积和较强的阳离子交换能力等特殊性质，对受污染土壤中的重金属和有机物都具有很强的吸附能力，有效地降低这些污染物的生物有效性和在环境中的迁移，对改善土壤环境具有重大意义。近年来我国土壤污染严重，利用生物质炭修复受污染土壤的技术得到了广泛的关注。本文简述了生物质炭修复土壤污染的基本原理，探讨了与其他修复方法相比存在的优势，阐述了国内外近年来利用生物质炭修复污染土壤的研究进展，最后展望了今后需要进一步研究的领域。

Use of Biochar for Remediation of Soils Contaminated with Heavy Metals and Organic Pollutants: A Review

Biochar is produced by pyrolysis of biological residues. It has a high porosity and high carbon content. Typically biochars have relatively large surface areas and cation exchange capacities. Therefore, biochars can strongly adsorb heavy metals and organic pollutants, and reduce their mobility and bioavailability in contaminated soils. In recent years, soil contamination has become a serious problem in China. Use of biochar as a soil amendment for remediation of contaminated soils has attracted considerable attention. This paper provides an overview on the recent advances in the research and development of using biochar for remediation of contaminated soils, its underlying mechanisms, and the advantages and disadvantages associated with this technology. Further research directions are proposed to ensure a sustainable use of biochar as an amendment for remediation of contaminated soils.