不同种类腐殖酸对废水中La(Ⅲ)的吸附研究  

Adsorption Studies of La(Ⅲ)in Wastewater by Different Kinds of Humic Acids

作　　者：施和平[1,2,3] 郭媛媛 红梅 张静茹 吴瑞凤 Shi Heping;Guo Yuanyuan;Hong Mei;Zhang Jingru;Wu Ruifeng(College of Science,Inner Mongolia Agricultural University,Hohhot 010018,China;Inner Mongolia Key Laboratory of Soil Quality and Nutrient Resources,Hohhot 010018,China;Key Laboratory of Agricultural Ecological Security and Green Development at Universities of Inner Mongolia Autonomous,Hohhot 010018,China;Inner Mongolia University of Technology,Hohhot 010020,China)

机构地区：[1]内蒙古农业大学理学院,内蒙古呼和浩特010018 [2]内蒙古土壤质量与养分资源重点实验室,内蒙古呼和浩特010018 [3]农业生态安全与绿色发展自治区高等学校重点实验室,内蒙古呼和浩特010018 [4]内蒙古工业大学,内蒙古呼和浩特010020

出　　处：《山东化工》2024年第16期236-239,242,共5页Shandong Chemical Industry

基　　金：国家自然科学基金(21167010);内蒙古自治区科技重大专项(2019ZD001);内蒙古农业大学学科交叉研究基金(BR22-15-02)。

摘　　要：为研究不同种类腐殖酸对镧离子的吸附差异性,采用焦磷酸钠法和氢氧化钠法提取出不同种类腐殖酸,并对其元素组成和官能团进行了初步表征;研究温度、pH值、初始浓度、时间对吸附La(Ⅲ)的影响,同时运用准一级、准二级吸附动力学对数据进行拟合,通过Langmuir和Freundlich方程对等温吸附过程进行拟合。结果表明:不同种类腐殖酸的腐殖化程度和芳香度有差异,在酸性条件下不同种类腐殖酸对La(Ⅲ)的吸附量增加,而在碱性条件下除黄腐酸外都降低,温度升高则吸附能力下降,不同种类腐殖酸对La(Ⅲ)的吸附动力学过程更符合准二级动力学吸附方程,等温吸附曲线符合Freundlich模型。In order to study the adsorption variability of lanthanide ions by different kinds of humic acids,different kinds of humic acids were extracted by sodium pyrophosphate and sodium hydroxide methods,and their elemental compositions and functional groups were preliminarily characterised;the influences of temperature,pH,initial concentration,and time on the adsorption of La(Ⅲ)were investigated,and quasi-primary and quasi-secondary adsorption kinetics were also applied to fit the data,and the adsorption kinetics of the adsorption process were determined by Langmuir and Freundlich equations to fit the isothermal adsorption process.The results showed that the humification degree and the aromaticity of different humic acids were different,the adsorption of La(Ⅲ)by different humic acids increased under acidic condition,while decreased under alkaline condition,except for xanthic acid,and the adsorption capacity decreased with the increase of the temperature,and the adsorption kinetics of La(Ⅲ)by different humic acids was more in line with quasi second-order kinetic adsorption equations,and the isothermal adsorption curves were in line with the Freundlich model.Freundlich model.

关 键 词：腐殖酸 镧离子 吸附 动力学 等温吸附 

分 类 号：X703[环境科学与工程—环境工程]