摘要
利用天然矿物吸附重金属Cd^(2+),研究其吸附体系的影响因素、吸附等温线以及动力学过程。结果表明:天然矿物对Cd^(2+)的吸附去除率随吸附剂量的增加而逐渐提高,而在此过程中饱和吸附量不断下降。吸附体系对Cd^(2+)的吸附去除率随初始pH值提高而增加,随反应时间的增加不断提高。天然矿物对重金属Cd^(2+)的吸附过程更符合Langmuir吸附等温模型,目标污染物在天然矿物上的吸附过程更符合准二级动力学模型。
The natural mineral was used to adsorb the heavy metal Cd^2+ in the experiment,and the influencing factors,the adsorption isotherm and the kinetics process in the adsorption system was also investigated.The results showed that,the adsorption removal rate of Cd^2+ by the natural mineral improved gradually with the increase of the adsorption dose,and the saturated adsorption amount decreased continuously during this process.The adsorption removal rate of Cd^2+ by the adsorption system increased with the initial pH value and the increase of reaction time.The adsorption of Cd^2+ accorded with Lang'muir adsorption isotherm,and the reaction of adsorption on the natural mineral for Cd^2+ matched to the pseudo-second class reaction kinetics model.
作者
程婷
张晓
陈晨
赵建东
Cheng Ting;Zhang Xiao;Chen Chen;Zhao Jiandong(Department of City Science,Jiangsu City Vocational College,Nanjing 210017;School of Environmental and Chemical Engineering,Jiangsu University of Science and Technology,Zhenjiang 212018)
出处
《粉煤灰综合利用》
CAS
2018年第6期9-12,共4页
Fly Ash Comprehensive Utilization
基金
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)
2016江苏高校"青蓝工程"中青年学术带头人培养对象
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(KF2015011)
江苏省大学生创新实践训练项目(201814000003Y)
关键词
重金属
镉
天然矿物
吸附
heavy metals
cadmium
natural mineral
adsorption
