生物炭的化学改性及其对镉污染环境修复进展

Biochar Chemical Modification and its Progress of Cadmium Pollution Environmental Restoration

化学改性是采用化学方法对生物质原料或生物炭进行改性,以改善未改性生物炭吸附量有限、选择性差等缺点。阐述了酸改性、碱改性、氧化改性、金属负载改性、有机改性和复合改性六种生物炭化学改性法原理及其对生物炭理化性质的影响,以及在镉污染环境的修复效果。最后,提出了一些建议,以期为改性生物炭的制备以及在环境介质中的应用提供一定的参考。

Chemical modification refers to the modification of biomass raw materials or biochar by chemical methods to improve the shortcomings of unmodified biochar, such as limited adsorption capacity and poor selectivity. The principles of six chemical modification methods of biochar, including acid modification, alkali modification, oxidation modification, metal loading modification, organic modification and composite modification, and their effects on the physical and chemical properties of biochar, as well as the remediation effect in cadmium polluted environment, were described. Finally, some suggestions are put forward, which can provide some reference for the preparation of modified biochar and its application in environmental media.