【摘要】 目前以生物炭为代表的生物质对重金属的修复表现出良好的应用前景.不同生物质材料来源的生物炭对于重金属的吸附效果不同,且不同的制备条件下,采用不同的处理方法,其主要产物的碳含量和产量均不同.生物炭具有较大的比表面积和丰富的孔道结构,对于重金属的吸附具有至关重要的作用,同时生物炭较高的pH值和CEC也增加了土壤对于重金属的静电吸附量.施用生物炭能有效减少土壤中可交换态重金属的含量,降低土壤中重金属的生物可利用性和迁移能力.由于土壤酶活性受多因素共同影响,笔者认为生物炭对土壤酶活性的影响机制应进行更一步的研究和探讨,并对生物炭修复土壤重金属的应用前景进行了展望.更多还原

【Abstract】 At present,the biomass represented by biochar has a good application prospect for the remediation of heavy metals.The biochar of different biomass materials has different adsorption effects on heavy metals,and the carbon content and output of the main products of different treatment methods under different preparation conditions are different.Biochar has a large specific surface area and rich pore structure,which plays a crucial role in the adsorption of heavy metals,and meanwhile the higher pH value and CEC biochar also increase the electrostatic adsorption of heavy metals in the soil.The application of biochar also reduces the exchangeable content of heavy metals in soil,which leads to a decrease in the bioavailability and mobility of heavy metals in the soil.Soil enzyme activities are affected by many factors,so the impact of biochar on soil enzyme activities and mechanisms should be more further studied and discussed.In addition,the research on remediation of heavy metal pollution in soil by biochar is prospected.更多还原