天然矿物对重金属Pb2+的吸附性能研究  

Study on the adsorption properties of natural mineral for heavy metal of Pb2+

作　　者：程婷[1] 陈晨 张晓[1] 刘海霞[1] 吕瑞阳 CHENG Ting;CHEN Chen;ZHANG Xiao;LIU Hai-xia;LYU Rui-yang(Department of City Science,Jiangsu City Vocational College,Nanjing 210017,China;School of Environmental and Chemical Engineering,Jiangsu University of Science and Technology,Zhenjiang 212018,Jiangsu,China)

机构地区：[1]江苏城市职业学院城市科学系,南京210017 [2]江苏科技大学环境与化学工程学院,江苏镇江212018

出　　处：《湖北农业科学》2019年第17期56-59,62,共5页Hubei Agricultural Sciences

基　　金：2016江苏高校“青蓝工程”中青年学术带头人培养对象项目;国家自然科学基金项目（21407068）;江苏省科技计划项目（江苏省政策引导类计划-产学研前瞻性联合研究BY2016068-01）;江苏省高等学校自然科学研究面上项目（17KJD610001;17KJD610002）;江苏城市职业学院“十三五”规划科研课题（16SSW-Z-001;17SSW-Z-Q-027）;江苏省环境工程重点实验室科研开放基金项目（HX2016012）;江苏省大学生创新实践训练项目(201814000003Y)

摘　　要：利用天然矿物吸附重金属Pb^2+,研究吸附剂量、pH、反应时间对吸附效果的影响,对其吸附过程进行吸附等温线和吸附动力学拟合。结果表明,随着吸附剂量的不断提高,初始浓度为50mg/L与100mg/L的重金属Pb^2+的吸附去除率均不断提高,而其饱和吸附量逐渐下降,天然矿物对重金属Pb2+的最大饱和吸附量为87.67mg/g。酸性条件下天然矿物对重金属Pb^2+的吸附效果较低,而偏酸性环境吸附处理效果较好。天然矿物对Pb^2+的吸附去除率随反应时间的增加而不断增加。天然矿物对Pb^2+的吸附过程符合Freundlich吸附等温模型,且Pb^2+的吸附过程拟合结果更加符合准二级动力学模型。The experiment was conducted to examine the adsorption of Pb^2+ on the natural mineral.The adsorbent dosage,pH and the reaction time was investigated,and the adsorption isotherm and kinetics equation in the adsorption process was discussed.The results showed that,with the increasing of the adsorbent dosage,the removal rate of Pb^2+ on the natural mineral was improved at the concentration of 50 mg/L and 100 mg/L gradually,while the saturated adsorption capacity was decreased.The maximum saturated adsorption capacity of natural minerals for heavy metal Pb2+ was 87.67 mg/g.The adsorption of heavy metals Pb^2+ by natural minerals at acidic condition was relatively lower,while the adsorption treatment effect of slightly acidic environment was better.The removal rate of Pb^2+ increased gradually with the increased of reaction time.The adsorption process of Pb^2+ accorded with Freundlich adsorption isotherm.Furthermore,the reaction of adsorption on natural mineral to Pb^2+ matched to the pseudo-second class reaction kinetics model.

关 键 词：重金属Pb2+ 天然矿物 吸附性能 

分 类 号：X52[环境科学与工程—环境工程]