改性土壤的制备及其对Hg^(2+)的吸附性能研究  

Preparation of Modifi ed Soil and Study on Its Adsorption Properties for Hg^(2+)

作　　者：王露 邵延海[1] 张龚丹 Wang Lu;Shao Yanhai;Zhang Gongdan(Faculty of Land Resource Engineering,Kunming University of Science and Technology,Yunnan,650093;Solid Waste Pollution Prevention and Control Center of Huanggang,Hubei,438000;Huanggang Ecological Environment Monitoring Center,Hubei,438000)

机构地区：[1]昆明理工大学国土资源工程学院,云南650093 [2]黄冈市固体废物污染防治中心,湖北438000 [3]黄冈生态环境监测中心,湖北438000

出　　处：《当代化工研究》2025年第1期194-196,共3页Modern Chemical Research

摘　　要：为了经济高效地脱除废水中的重金属汞离子,制备改性土壤作为Hg2+的优良吸附剂。利用5种酸性活化剂对土壤进行改性,发现用体积分数为0.3%的HNO3洗涤后改性土壤对Hg2+的吸附性能较好。Freundlich方程很好地描述了改性土壤对Hg2+的吸附等温线,改性土壤在进行Hg2+吸附时,最佳pH值为9。在动力学分析中发现,伪二阶动力学方程更加符合改性土壤对Hg2+的吸附过程。对改性土壤进行脱附再生实验后发现,HCl和乙醇分段式的脱附方式吸附效率最高,达到62.79%。To cost-effectively remove heavy metal mercury ions from wastewater,modified soil was prepared as an excellent adsorbent for Hg2+.Five acidic activators were used to modify the soil,and it was found that the modified soil after washing with 0.3%HNO3 exhibited superior adsorption performance for Hg2+.The Freundlich equation accurately described the adsorption isotherm of the modified soil for Hg2+.The optimal pH for the adsorption of Hg2+by the modified soil was 9.In kinetic analysis,it was discovered that the pseudo-second-order kinetic equation more closely fit the adsorption process of the modified soil for Hg2+.After conducting desorption regeneration experiments on the modified soil,it was dis-covered that the segmented desorption method using HCl and ethanol achieved the highest adsorption efficiency of 62.79%.

关 键 词：改性土壤 静态吸附 重金属 吸附动力学 

分 类 号：X53[环境科学与工程—环境工程]