功能性生物炭的制备及其去除水中污染物的应用研究

Preparation of Functional Biochar and Its Application in the Removal of Contaminants from Aqueous Solutions

目前,生物炭在土壤改良、吸附降解污染物、减少温室气体排放等方面广泛应用.对生物炭进行合理改性,可以改善其理化性质和提高环境功效,从而促进其工程应用.通过改性,生物炭的比表面积、表面含氧官能团等增加,从而促进其对污染物的吸附和降解.本文对不同改性方法导致的生物炭性质变化及其对水中污染物的去除研究展开综述,并总结了功能性生物炭的改性机理、再生问题等.此外,对功能性生物炭未来的研究重点和尚未解决的关键科学问题提出了展望,对功能性生物炭的深入研究将为其安全使用及工程应用提供理论支撑.

Biochar has been applied widely in soil remediation,contaminant adsorption and degradation as well as greenhouse gas emission reduction at present.The physico-chemical properties and the environmental effects of biochar could be improved greatly after reasonable modification,and thus promoting its engineering application.The adsorption and degradation ability of modification biochar for contaminants could be enhanced due to its increasing specific surface area and surface oxygen-containing functional groups.This paper reviewed the research progress on the property change of biochar by different modification method and the removal of contaminants by functional biochar from aqueous solutions.The modification mechanisms and regeneration of functional biochar were also summarized.In addition,the future research focuses and key scientific issues that have not been solved of functional biochar are prospected.The intensive study on the functional biochar will provide theoretical basis for its development direction and engineering application.