硅藻土复合除磷材料的吸附动力学及热力学研究  

Adsorption Kinetics and Thermodynamics of Diatomite Composite Phosphorus Removal

作　　者：高耀文[1] 段宁[1] 吴克明[1] 张银凤[1] 

机构地区：[1]武汉科技大学冶金矿产资源高效利用与造块湖北省重点实验室,武汉430081

出　　处：《工业安全与环保》2013年第6期76-78,94,共4页Industrial Safety and Environmental Protection

基　　金：湖北省教育厅重点项目(编号D20101107)

摘　　要：对硅藻土-粉煤灰复合除磷材料吸附废水中磷的动力学和热力学进行了研究。结果表明,准二级动力学方程对复合材料吸附磷的过程描述更为准确;热力学参数(ΔGo、ΔHo和ΔSo)说明溶液中的磷在复合除磷材料上的吸附是自发进行的,而且是一个吸热过程;平均吸附能E为2.24 kJ/mol,说明该吸附属于物理吸附。In this paper,adsorption kinetics and thermodynamics of phosphorus sorption onto diatomite-fly ash composite phosphorus removal is investigated.The results show that pseudo-second-order kinetic model can more accurately describe the phosphorus adsorption process.The calculated thermodynamic parameters(ΔGo,ΔHo and ΔSo) illustrates that the adsorption of phosphorus onto composite phosphorus removal is spontaneous and endothermic,in addition,the mean adsorption energy is calculated as 2.24 kJ/mol,indicating that the phosphorus adsorption is physically carried out.

关 键 词：硅藻土 复合除磷材料 动力学 热力学 

分 类 号：X703[环境科学与工程—环境工程]