生物炭负载纳米零价铁对镉污染土壤的修复效果研究

Study on the Remediation Effect of Biochar Supported Nanoscale Zero-valent Iron on Cadmium-contaminated Soil

本研究制备了生物炭负载纳米零价铁(nZVI/BC)复合材料,通过有效态镉(Cd)质量浓度、浸出毒性以及土壤理化性质等指标评价了nZVI/BC对土壤中Cd的修复效果。结果表明:与对照组相比,15 d修复后,nZVI/BC处理组中有效态Cd质量浓度降低了86.18%,Cd的浸出质量浓度由0.105 mg/L降低至0.038 mg/L,有效降低了Cd的溶出和环境风险。

Biochar-supported nano zero-valent iron(nZVI/BC)composites were prepared.The remediation effect of nZVI/BC on heavy metal Cd in soil was evaluated by the mass concentration of available cadmium,leaching toxicity and soil physical and chemical properties.Results showed that compared with the control group,after 15 days of remediation,the mass concentration of available cadmium in nZVI/BC treatment group decreased by 86.18%;the leaching mass concentration of cadmium decreased from 0.105 mg/L to 0.038 mg/L,and effectively reduces the dissolution of cadmium and environmental risks.