磷在磁铁矿-针铁矿混合相上的吸附  

Adsorption of phosphorus from aqueous solution on magnetite-goethite mix phase

作　　者：邵鹏辉[1] 唐朝春[1] 简美鹏[1] 余荷根[1] 

机构地区：[1]华东交通大学土木建筑学院,南昌330013

出　　处：《环境工程学报》2013年第9期3433-3438,共6页Chinese Journal of Environmental Engineering

基　　金：江西省教育厅科技项目(赣教技字[2007]194号);江西省科技厅支撑计划项目(2009AE01601)

摘　　要：首次采用使用后贴式取暖物(商业名:热力贴)为原料制备吸附剂,元素分析、XRD、红外图谱综合鉴定为磁铁矿-针铁矿混合相(magnetite-goethite mix phase,MGM),其比表面积为98.3 m2/g,平均粒径为510 nm,零电荷点在pH=5.7附近;磷在MGM上的吸附等温线符合Langmuir方程,其吸附历时曲线遵循准二级动力学模型,升温能促进磷的吸附;在实际废水磷浓度为51.8 mg/L、初始溶液pH=2的条件下,当MGM投加量为10 g/L时,磷的去除率为94.16%。In this study,an adsorbent was first prepared from used hot pack.The adsorbent was confirmed to be magnetite-goethite mix phase（MGM） by XRD,FTIR and elemental analysis.BET surface area,average diameter and point of zero charge were 98.3 m2/ g,510 nm,and pH 5.7,respectively.The adsorption isotherms of phosphorus fit Langmuir equation well,and the time-resolved curves of phosphorus adsorption on MGM follows pseudo-second-order kinetic model.With the increase of temperature,the adsorption of phosphorus was promoted.A removal rate of 94.16% was observed at the dosage of 10 g / L when the initial phosphate concentration in sewage（pH 2.0） was 51.8 mg / L.

关 键 词：磁铁矿 针铁矿 磷 吸附 

分 类 号：X52[环境科学与工程—环境工程]