涂铁石英砂吸附Cr(Ⅵ)的研究  

Adsorption of Cr(Ⅵ) on Iron Oxide Coated Sand

作　　者：黄自力[1] 胡岳华[2] 郑春华[1] 

机构地区：[1]武汉科技大学资源与环境工程学院,湖北武汉430081 [2]中南大学资源加工与生物工程学院,湖南长沙410083

出　　处：《武汉科技大学学报》2006年第5期465-468,共4页Journal of Wuhan University of Science and Technology

基　　金：国家杰出青年科学基金(59925412);湖北省教育厅资助项目(B200511004)

摘　　要：采用加热蒸发法制备涂铁石英砂,对滤料改性前后的含铁量、氧化铁膜的附着能力、比表面积、表面形态以及氧化铁膜的物相组成进行了测定和分析。研究结果表明,随着溶液的离子强度增大或pH值升高,Cr(Ⅵ)的吸附率减小;在Cr(Ⅵ)离子浓度较低条件下,其吸附属Langmu ir单层吸附;涂铁石英砂不仅是一种过滤介质,也是一种吸附剂。Heating vaporization was employed to prepare iron oxide coated sand （IOCS）, and the properties of filter media （sand and IOCS） including iron content, adherence of iron oxide film on sand surface, specific area, morphologies of surface, and matter species of iron oxide were made known by chemical analysis, BET measurement, SEM and XRD. It was found by the experiments of adsorption and filtration that, less Cr（Ⅵ） was adsorbed on IOCS under higher ion strength or higher pH value, the sorption pattern was Langmuir singlelayer adsorption when the concentration of Cr（ Ⅵ ） was low, and IOCS was not only filtration medium but also adsorbent.

关 键 词：涂铁石英砂 Cr(Ⅵ) 吸附 过滤 

分 类 号：X703.1[环境科学与工程—环境工程]