氧化活性炭负载巯基修复汞污染土壤

Remediation of Mercury Contaminated Soil with Sulfhydryl Groups Loaded on Oxidized Activated Carbon

文章通过预氧化+负载巯基改性制备了改性活性炭OACSH,并利用XRD、FTIR、SEM-EDS、BET等技术手段进行了表征。实验对负载巯基的氧化改性活性炭的稳定化效果进行了验证。结果显示:活性炭经氧化改性后表面变得粗糙,负载巯基后碳基中出现团聚物,团聚物中出现了含硫物质(C4SO3),且红外谱图中出现了-SH峰,说明巯基负载成功。负载巯基的氧化改性活性炭添加3%时,稳定化效率高达99.95%,汞浸出值为2μg/L,远低于GB 5085.3—2007规定的汞限值0.10 mg/L,结果表明OACSH对汞污染土壤的具有很好的稳定化修复效果。

Modified activated carbon OACSH was prepared by pre-oxidation and sulfhydryl groups modification.And it was characterized by XRD,FTIR,SEM-EDS,BET and other technical methods.The experiment was performed to verify the stabilization effect of the oxidized modified activated carbon loaded with sulfhydryl groups.The results showed that the surface of activated carbon became rough after oxidative modification.Agglomerates appeared in the carbon group after loading sulfhydryl groups,and the sulfur-containing substances(C4SO3)appeared in the agglomerates.In addition,the-SH peak appeared in the infrared spectrum,indicating that the sulfhydryl group was loaded successfully.The stabilization efficiency was up to 99.95%and the mercury leaching value was 2μg/L with 3% OACSH added to the mercury contaminated soil.The data was far lower than the mercury limit of 0.10 mg/L specified in GB 5085.3-2007.The results showed that there was a good stabilization and remediation effect of OACSH to the mercury contaminated soil.