摘要
以黄土、腐殖酸和重金属离子为研究对象,基于吸附实验,研究了黄土对腐殖酸及Cu2+、Zn2+、Pb2+、Cd2+ 4 种重金属离子的吸附规律.结果表明,黄土对各污染物的去除率随着固液比增大、溶液pH增大、初始浓度减小、吸附时间的延长明显增大,而且对不同污染物吸附效果的影响也不同;但黄土对重金属离子的吸附量一直保持为Pb2+＞Cu2+＞Cd2+＞Zn2+.
Abstract
Taking loess,humic acid and heavy metal ions as the research objects,based on the adsorption experiment,the adsorption law of loess on humic acid and Cu2+,Zn2+,Pb2+ and Cd2+ was studied.The results indicate that the removal rate of various pollutants by loess increases significantly with the increase of solid-liquid ratio,solution pH,initial concentration reduction,and prolongation of adsorption time,and the impact on the adsorption efficiency of different pollutants is also different;however,the adsorption capacity of loess for heavy metal ions has always been maintained at Pb2+＞Cu2+＞Cd2+＞Zn2+.
基金项目
山西省基础研究计划(20210302123192)
NETL
NSTL
万方数据