磷在蛋壳粉中的吸附热力学和动力学  

ADSORPTION THERMODYNAMICS AND KINETICS OF PHOSPHORUS IN EGG SHELL

作　　者：郭照冰[1] 陈天[1] 周飞[1] 董琼元[1] 陈天蕾[1] 包春晓[1] 吕婷[1] 郑正[2] 

机构地区：[1]南京信息工程大学环境科学与工程学院,南京210044 [2]复旦大学环境科学与工程系,上海200433

出　　处：《环境化学》2011年第5期1006-1010,共5页Environmental Chemistry

基　　金：国家水体污染控制与治理科技重大专项(2008ZX07101-004-01);江苏省科技项目(BK2009414);江苏省"青蓝工程"人才项目;江苏省大学生实践创新计划项目(10CX006/09CX0008);南京信息工程大学科研项目(20080316)资助

摘　　要：利用蛋壳粉对水中的磷进行吸附热力学和动力学研究.结果表明,蛋壳粉对水中的磷具有一定的吸附作用,吸附等温线符合Freundlich方程,吸附ΔH、ΔS与ΔG显示蛋壳粉对水中磷的吸附是自发吸热的物理过程.磷在蛋壳中的吸附动力学曲线存在两个吸附平台,吸附过程符合准二级动力学模型,磷在蛋壳中的吸附可能受到吸附边界层和内部孔道结构的影响.Adsorption thermodynamics and kinetics of phosphorus in egg shell were studied.Phosphorus was adsorbed in egg shell and the adsorption isotherms could be well described by Freundlich equation.Adsorption ΔH,ΔS and ΔG revealed that phosphorus adsorption in egg shell was a spontaneous,endothermal and physical adsorption process.Uptake of phosphorus in egg shell contained 2 steps,which could be described by pseudo-second-order reaction kinetics model.Phosphorus adsorption in egg shell was probably related to the boundary layer and inner pores of egg shell in addition to free diffusion between molecules.

关 键 词：蛋壳粉 磷 吸附 热力学 动力学 

分 类 号：X131.2[环境科学与工程—环境科学]