酸改性污泥基复合陶粒对Pb^(2+)的吸附性能研究  

Adsorption Properties of Acid Modified Sludge-based Composite Ceramsite on Pb^(2+)

作　　者：欧洋洋 冯丽娟[1] 刘安蓉 黄祝 梁远义 OU Yangyang;FENG Lijuan;LIU Anrong;HUANG Zhu;LIANG Yuanyi(School of Geographic and Environmental Science,Guizhou Normal University,Guiyang,Guizhou 550025,China)

机构地区：[1]贵州师范大学地理与环境科学学院,贵州贵阳550025

出　　处：《环境监测管理与技术》2024年第2期60-63,共4页The Administration and Technique of Environmental Monitoring

基　　金：贵州省普通高等学校青年科技人才成长基金资助项目(黔教合KY字[2021]300);贵州省基础研究计划基金资助项目(黔科合基础[2017]1123);贵州省科技合作计划基金资助项目(黔科合LH字[2016]7215号)。

摘　　要：以污泥、磷尾矿和赤泥为原料制备陶粒,用盐酸、硝酸和柠檬酸进行改性,研究陶粒对水中Pb^(2+)的吸附效果,并通过扫描电镜(SEM)、表面基团、零电荷点(pHPZC)和傅里叶红外光谱(FTIR)分析陶粒对Pb^(2+)的吸附机理。结果表明,低浓度盐酸或硝酸改性陶粒对Pb^(2+)的去除率更好,柠檬酸改性陶粒对Pb^(2+)的去除率低于未改性陶粒。酸改性陶粒具有比表面积大、孔隙结构发达、酸性基团含量多、等电点低等特点,对Pb^(2+)的吸附同时存在物理吸附和化学吸附过程,可用作含Pb^(2+)废水的处理材料。The ceramsite was prepared by using sludge,phosphorus tailings and red mud as raw materials,then modified with hydrochloric acid,nitric acid and citric acid,and its adsorption effect on Pb^(2+)in water was studied.The adsorption mechanism was analyzed by scanning electron microscope(SEM),surface groups,zero charge point(pHPZC)and Fourier infrared spectroscopy(FTIR).The results showed that the ceramsite modified with low concentration of hydrochloric acid or nitric acid had a good removal rate of Pb^(2+).The removal rate of Pb^(2+)by citric acid modified ceramsite was lower than that of unmodified ceramsite.Acid modified ceramsite had the characteristics of large specific surface area,developed pore structure,high content of acid groups and low isoelectric point.The ceramsite performed both physical and chemical adsorption on Pb^(2+),which could be used as treatment materials for Pb^(2+)-containing wastewater.

关 键 词：Pb^(2+) 磷尾矿 酸改性陶粒 吸附性能 城市污泥 

分 类 号：X705[环境科学与工程—环境工程]