环境工程学报2012，Vol.6Issue(4)：1245-1250,6.
改性粉煤灰对糖蜜废水的吸附效果及机理
Adsorption effect and mechanisms of modified coal fly ash to molasses wastewater
摘要
Abstract
This study investigates and analyzes the adsorption effect and mechanisms of molasses wastewater on modified coal fly ash（MCFA） for the removal of organic pollutants.The results showed that when the dose of MCFA was 30 g/L at pH of 5.0,88.6% of COD removal efficiency could be achieved with a sutured adsorption capacity of 89.7 mg COD/g MCFA.The kinetics of adsorption of molasses wastewater on MCFA was fit well to the pseudo-second order model.The intraparticle diffusion was identified not to be a sole rate limiting step.Freundlich gave a better fit to all adsorption isotherms with a favorable adsorption.The adsorption free energy by D-R model,Ea value,indicated that the adsorption process could be more likely to be a physical adsorption rather than a chemical one.The thermodynamic adsorption parameters,ΔH0（5.130 kJ/mol）,ΔS0（19.936 J/（mol·K）） and the negative values of change in ΔG0 demonstrate the feasibility and spontaneous nature of the adsorptive treatment.关键词
糖蜜废水/粉煤灰/吸附平衡/吸附动力学/颗粒内扩散Key words
molasses wastewater/fly ash/adsorption isotherms/adsorption kinetics/intraparticle diffusion分类
资源环境引用本文复制引用
唐海,刘桂中,颜酉斌..改性粉煤灰对糖蜜废水的吸附效果及机理[J].环境工程学报,2012,6(4):1245-1250,6.基金项目
基金项目：安徽省高校省级科学研究项目 （）
