摘要
为了提高重金属污染土壤的修复治理效果,以混合生物质秸秆为原材料,通过高温热解反应制备生物炭SW-1,将其与羧甲基壳聚糖相结合,制备一种新型生物炭复合材料FSW-1,模拟评价了FSW-1对水溶液中重金属的吸附效果以及对土壤中重金属的钝化效果。结果表明:FSW-1对水溶液中重金属Cu、Cd和Pb的吸附效果较好,对不同质量浓度的重金属溶液均具有较高的平衡吸附量。FSW-1对土壤中重金属Cu、Cd和Pb的钝化效果较好,与空白组相比,加入5%的FSW-1后土壤中有效态重金属Cu、Cd和Pb的质量分数均大幅下降,当土壤中重金属Cu的质量分数为800 mg·kg^(-1)时,有效态Cu的质量分数可降低80%以上;当重金属Cd的质量分数为40 mg·kg^(-1)时,有效态Cd的质量分数可降低85%以上;当重金属Pb的质量分数为400 mg·kg^(-1)时,有效态Pb的质量分数可降低70%以上。
In order to improve the remediation effect of heavy metal contaminated soil,mixed biomass straw was used as raw material to prepare biochar SW-1 through high-temperature pyrolysis reaction.Then,biochar SW-1 was further combined with carboxymethyl chitosan to prepare a new type of biochar composite material FSW-1.The adsorption effect of FSW-1 on heavy metals in aqueous solution and the passivation effect on heavy metals in soil were simulated and evaluated.The results indicated that the FSW-1 had good adsorption effect on heavy metals Cu,Cd,and Pb in aqueous solutions,and had high equilibrium adsorption capacity for heavy metal solutions of different mass concentrations.The FSW-1 had good passivation effect on heavy metals Cu,Cd,and Pb in soil.Compared with the blank group,addition of 5%FSW-1 significantly reduced the mass fractions of available heavy metals Cu,Cd,and Pb in soil.When the mass fraction of heavy metal Cu in soil was 800 mg·kg^(-1),the mass fraction of available Cu was reduced by more than 80%;when the mass fraction of heavy metal Cd was 40 mg·kg^(-1),the mass fraction of available Cd was reduced by more than 85%;when the mass fraction of heavy metal Pb was 400 mg·kg^(-1),the mass fraction of available Pb was reduced by more than 70%.
作者
滕克勇
TENG Keyong(Guangxi Huanjiang Xiangsheng Household Material Technology Co.,Ltd.,Hechi Guangxi 547100,China)
出处
《当代化工》
2025年第11期2623-2626,2631,共5页
Contemporary Chemical Industry
基金
广西重点研发计划基金项目(项目编号:桂科AB22128061)。
关键词
生物炭复合材料
土壤
重金属污染
吸附效果
钝化效果
Biochar composite materials
Soil
Heavy metal pollution
Adsorption effect
Passivation effect
