化工进展2017，Vol.36Issue(6)：2331-2336,6.DOI:10.16085/j.issn.1000-6613.2017.06.052
HCl/H2SO4改性粉煤灰的制备及其吸附性能
Fly ash modified by HCl/H2SO4 and their adsorption capacity
摘要
Abstract
As an industrial waste,fly ash was used in wastewater treatment because of abundance,high porosity structure and large specific surface area. In this study,fly ash was modified using 1mol/L of mixed acid. The morphology and composition were characterized by Scanning Electron Microscope (SEM),X-ray Diffraction(XRD)and Fourier Transform Infrared Spectroscopy(FTIR)before and after the fly ash was modified. Furthermore,simulated dye wastewater was treated by the modified fly ash to study the adsorption capacity of modified fly ash. The results showed that the surface of modified fly ash formed a large number of grooves and holes so the roughness and adsorption void were increased. The removal efficiency of contaminants in the dye wastewater was the highest under the conditions of modified fly ash 15g/L,reaction time 45min,pH 6-8,and temperature 30℃. The removal efficiencies of COD and NH4+-N were 64% and 38%,respectively. And decolorization efficiency was 84%. In addition,the adsorption isotherms of simulated dye wastewater were compatible with the mechanism of monolayer adsorption and fit with Langmuir adsorption isotherms model. The adsorption process was a spontaneous and exothermic reaction,and the degree of disorder of the simulated wastewater treated by modified fly ash was reduced.关键词
改性粉煤灰/废水处理/吸附作用/热力学性质Key words
modified fly ash/wastewater treatment/adsorption/thermodynamic properties分类
资源环境引用本文复制引用
贾艳萍,姜修平,张兰河,张海丰,王嵬,陈子成..HCl/H2SO4改性粉煤灰的制备及其吸附性能[J].化工进展,2017,36(6):2331-2336,6.基金项目
国家自然科学基金(51678119)及吉林省科技发展计划(20150204052SF,20160101268JC,20150519020JH,20160101295JC)项目. （51678119）
