【摘要】 铁尾矿含有Pb、Cu、Cr、Zn等重金属，没有经过处理就大量堆积，会造成严重的重金属污染。超临界二氧化碳萃取技术可在短时间内对多种重金属同时实现高效去除。研究以乙醇作为夹带剂，使用磷酸三丁酯（A）和二乙基二硫代氨基甲酸钠（B）作为络合剂在最佳条件下，Pb、Cu、Cr、Zn的最大去除率分别为88.28%、47.63%、65.58%、67.25%。同时，通过Gaussian模拟软件分别探讨了两种络合剂去除尾矿中重金属的机理。更多还原

【Abstract】 Iron tailings with heavy metals such as Pb, Cu, Cr and Zn accumulate in large quantities without treatment and they result in serious heavy metal pollution. Supercritical CO₂ extraction technology can simultaneously and efficiently remove multiple heavy metals in a very short time. In this study, the maximum removal rates of Pb, Cu, Cr and Zn are 88.28%, 47.63%, 65.58% and 67.25%, respectively when taking ethanol as the entrainment agent and tributyl phosphate（A） and diethyldithiocarbamate sodium（B）as the complexing agent under the optimal conditions; meanwhile, through making use of Gaussian simulation software, the mechanism of removing heavy metals from tailings by two complexing agents was discussed.更多还原