污泥水热炭吸附矿区土壤重金属的性能分析  

Performance Analysis of Sludge Hydrothermal Carbon Adsorption of Heavy Metals in Mining Soil

作　　者：李彩霞 谢玲琳 陈玉贵 李浩 罗红梅 杨票 LI Caixia;XIE Linglin;CHEN Yugui;LI Hao;LUO Hongmei;YANG Piao(Key Laboratory of Natural Resources Monitoring and Supervision in Southern Hilly Region,Ministry of Natural Resources,Changsha 410029,China;Hunan Meteorological Service Center,Changsha 410118,China;Key Laboratory of Heavy Metal Pollution Monitoring ofthe Ministry of Ecology and Enironment,Changsha 410019,China;The Second Surveying and Mapping Institute of Hunan Province,Changsha 410029,China;College of Environmental Science and Engineering,Hunan University,Changsha410082,China)

机构地区：[1]自然资源部南方丘陵区自然资源监测监管重点实验室,湖南长沙410029 [2]湖南省气象服务中心,湖南长沙410118 [3]生态环境部重金属污染监测重点实验室,湖南长沙410019 [4]湖南省第二测绘院,湖南长沙410029 [5]湖南大学环境科学与工程学院,湖南长沙410082

出　　处：《湖南有色金属》2025年第1期90-93,97,共5页Hunan Nonferrous Metals

基　　金：自然资源部南方丘陵区自然资源监测监管重点实验室开放基金项目(NRMSSHR2023Y14);生态环境部重金属污染监测重点实验室开放基金资助项目(KLMHM202428)。

摘　　要：以市政污泥为原料,在180、210、240℃温度下进行时长120min的水热炭化反应,对制备的水热炭进行理化性质分析。将水热炭加入土壤中调理90d,研究土壤理化性质、重金属植物有效性及存在形态的变化。结果表明,水热炭理化性质分析得出高灰分的水热炭在土壤中稳定性增强,可降低土壤中重金属迁移性,具有修复土壤中重金属的潜力。在土壤中添加水热炭有利于缓解土壤的板结化;还使土壤中重金属的植物有效性降低,尤其是Pb、Cu较明显,稳定率可达32.12%、27.54%;水热炭的添加增强了土壤中Pb、Cu的稳定性,但Cd的迁移性得到了加强,低温水热炭的添加更有利于土壤中Pb、Cu、Zn向稳定态转变。In this study,municipal sludge was utilized as the raw material to conduct a hydrothermal carbonization reaction at temperatures of 180℃,210℃and 240℃for a duration of 120 minutes.The physical and chemical properties of the resulting hydrothermal carbon were analyzed.The hydrothermal carbon was added to the soil for a period of 90 days to investigate the changes in soil physical and chemical properties,the phytoavailability and existing forms of heavy metals.The results indicated that the addition of high ash hydrothermal carbon to the soil improved its stability,thereby reducing the mobility of heavy metals and potentially aiding in the remediation of heavy metal-con-taminated soil through the analysis of the physical and chemical properties of hydrothermal carbon.The incorporation of hydrothermal carbon into the soil was found to be beneficial in mitigating soil hardening.Furthermore,the phytoavail-ability of heavy metals in the soil were reduced by adding high ash hydrothermal carbon,particularly Pb and Cu,which were reduced by 32.12%and 27.54%,respectively.The addition of hydrothermal carbon enhanced the stability of Pb and Cu in the soil,although it increased the mobility of Cd.It was observed that the addition of low temperature hy-drothermal carbon was more effective in facilitating the transformation of Pb、Cu、Zn in the soil into a stable state.

关 键 词：污泥水热炭 土壤 理化性质 植物有效性 重金属形态 

分 类 号：X53[环境科学与工程—环境工程]