牡蛎壳改性蜂窝煤渣对Cr(Ⅵ)的吸附  

Adsorption Behavior of Cr(Ⅵ) in Aqueous Solutions on Modified Honeycomb-cinder Adsorbent

作　　者：余美琼[1] 杨金杯[1] 陈秀宇[1] 邓殳[1] 郑之炜 

机构地区：[1]福建师范大学福清分校生物与化学工程系,福建福州350300

出　　处：《吉林化工学院学报》2014年第7期12-17,共6页Journal of Jilin Institute of Chemical Technology

基　　金：福建省教育厅科研项目(JA12355;JB12262);福建师范大学福清分校科研创新基金项目(KY2012001)

摘　　要：以蜂窝煤渣为原料,利用牡蛎壳粉进行高温改性,制备改性煤渣吸附剂;对改性前后的煤渣进行扫描电镜(SEM)和粉末X射线衍射(XRD)表征.通过L9(34)正交试验考察了吸附剂用量、吸附温度、铬液初始浓度和pH等因素对改性煤渣吸附效果的影响.结果表明改性煤渣对Cr(Ⅵ)具有良好的吸附能力.吸附过程满足准二级动力学模型并可用Langmuir吸附等温线描述.Honeycomb-cinder modification by oyster shell in laboratory scale was explored in this work and the adsorption performance of modified honeycomb-cinder in simulated chromium-containing wastewater were also studied. The modified honeycomb-cinder was characterized with scanning electron microscopy（ SEM） and Xray diffraction（ XRD）. The order of the factors that affect the adsorption performance of Cr（ Ⅵ） such as the adsorbent dosage,temperature,initial concentration of Cr（ Ⅵ） and pH are compared by orthogonal experiment.The results showed that the modified cinder absorbent had a good adsorption capacity for Cr（ Ⅵ）. The adsorption reaction was consistent with the second order kinetic equation and the adsorption process followed the Langmuir adsorption isotherm.

关 键 词：煤渣 牡蛎壳 吸附 Cr(Ⅵ) 正交试验 

分 类 号：X703.1[环境科学与工程—环境工程] TQ536.4[化学工程—煤化学工程]