Zn/Fe类水滑石对水中腐殖酸吸附性能的研究  

Adsorption of Zn/Fe Hydrotalcite-like Compounds on Humic Acid in Water

作　　者：程琛杰[1] 鲍治宇[1] 董延茂[1] 

机构地区：[1]苏州科技学院环境科学与工程学院,江苏苏州215011

出　　处：《苏州科技学院学报（工程技术版）》2010年第3期14-18,共5页Journal of Suzhou University of Science and Technology （Engineering and Technology）

基　　金：住房与城乡建设部科技项目(2008-K4-19);江苏省教育厅高校科研成果产业化推进项目(JHZD08-31);苏州市科技发展计划项目(SG0847)

摘　　要：采用共沉淀法合成了Zn/Fe型类水滑石(Zn/Fe-HTlc),并用SEM-EDAX元素分析、XRD与IR表征其结构和元素组成。研究了腐殖酸(HA)初始浓度、pH值、温度、电解质浓度等对Zn/Fe-HTlc吸附水中HA性能的影响。研究表明,Zn/Fe-HTlc吸附水中HA的吸附等温线符合Freundich吸附等温线模型。随着初始pH增大,HA吸附量降低。无机电解质能明显抑制HA在Zn/Fe-HTlc上的吸附。当温度为25℃,初始浓度为25 mg/L,pH=5.00,吸附时间为40 min时,Zn/Fe-HTlc对HA的饱和吸附量达12 mg/g。The Zn-Fe hydrotalcite-like compounds（Zn/Fe-HTlc） have been prepared by the coprecipitation,and the structure and elements are characterized by Scanning Electron Microscopy and Energy Dispersive Spec-troscopy（SEM/EDAX）,X-ray diffraction（XRD） and Fourier Transform Infrared Spectroscopy（FTIR）.The effects of the initial concentration of HA,the initial pH solution,temperature and additives of inorganic electrolytes on the property of the humic acid（HA） in the Zn/Fe-HTlc adsorption were investigated.Results show that the adsorption kinetics and the adsorption isotherms of HA on the Zn/Fe-HTlc can be described by the Freundich isotherm re-spectively.With the increase of pH,the adsorption amount decreases.The adsorption of HA on the Zn/Fe-HTlc can be restrained by the additives of inorganic electrolytes.The adsorption capacity of HA onto Zn/Fe-HTlc reaches 12 mg/g at 25 ℃,pH value 5,the initial HA concentration 25 mg/L and adsorption time 40 min.

关 键 词：类水滑石 吸附 腐殖酸 

分 类 号：X505[环境科学与工程—环境工程]