生物炭负载硫化纳米零价铁在修复土壤镉中的应用研究

Study on the Remediation of Cadmium in Soil with Biochar Supported Vulcanized Nano Zero-valent Iron

Cd作为重金属污染物,具有高毒性、难去除的特点,对生态安全以及人类健康造成了极大威胁。本文以BC为载体负载硫化纳米零价铁(S-nZVI)制备了BC负载硫化纳米零价铁(BC/S-nZVI),用于Cd的修复。BC/S-nZVI对Cd修复期间,DTPA提取Cd的固化效率为82%,TCLP对Cd的固定效率为63.36%,说明BC/S-nZVI具有更好的固定化潜力,能够有效降低土壤中Cd的有效性,并减少Cd的溶解和环境风险。

As a heavy metal contaminant,Cd is highly toxic and difficult to remove,which poses a great threat to ecological safety and human health.In this paper,BC supported vulcanized nano-zero-valent iron(BC/S-nZVI)was prepared for the remediation of Cd using BC as carrier.During the repair of Cd by BC/S-nZVI,the curing efficiency of Cd extracted by DTPA was 82%,and the fi xing efficiency of Cd by TCLP was 63.36%,indicating that BC/S-nZVI has better immobilization potential,which can effectively reduce the availability of Cd in soil,and reduce the dissolution and environmental risks of Cd.