%0 Journal Article
%T 超细粉煤灰对含铬废水的吸附性能和机理研究        ()-
%A 何婵
%A 吕晓军
%J 洁净煤技术
%D 2008
%X 以西郊和灞桥电厂粉煤灰(XFA和BFA)为原料,通过球磨法制得超细粉煤灰(XU-FA和BUFA),研究其对含铬废水的吸附性能和机理。结果表明,在25℃,pH值为2~3之间,反应时间为90m in,投加量为1.0g时,吸附效果最好,BFA对Cr(VI)的去除率为29.5%,XFA对Cr(VI)的去除率为25.5%,BUFA对Cr(VI)的去除率为36.5%,XUFA对Cr(VI)的去除率为33.3%。随温度升高,吸附量降低,证明该吸附反应过程为放热过程。对实验数据运用相关数学模型拟合,显示等温吸附平衡符合Langmuir吸附等温式,吸附过程动力学更适合二级吸附动力学模型。 Ultra fine coal fly ash was prepared from coal fly ash by ball milling.The adsorptive capacity and mechanism of adsorbing Cr(VI)were studied.The result showed that under the conditions of pH 2-3,the adsorption temperature of 25℃,a dosage of 1.0g and a reaction time of 90 minutes,the Cr(VI)removal efficiency can reach 29.5% for BFA,25.5% for XFA,36.5% for BUFA and 33.3% for XUFA.The adsorption capacity decreased with increase of temperature indicated that the adsorption was a exothermic process.Fitting the experimental data utilizing the related mathematic models,showing the isotherm adsorption equilibrium conformed to Langmuir model,and the adsorption process kinetic more adopted to the second-order reaction
%K 超细粉煤灰
%K 吸附
%K 含铬废水 ultra fine coal fly ash
%K adsorption
%K Cr(VI)-Containing wastewater
%U http://www.jjmjs.com.cn/WKD/WebPublication/paperDigest.aspx?paperID=c33ed560-b4ca-4d90-9a03-18e5e2207aa3