氧化铁/活性炭复合吸附材料去除水中砷的研究  

Studies on Removal of Arsenic from Aqueous Solutions with Iron Oxide/Activated Carbon Composite Materials

作　　者：张巧丽[1] 高乃云[1] 乐林生 陈洪斌[1] 

机构地区：[1]同济大学污染控制与资源化研究国家重点实验室,上海200092 [2]上海市自来水市北有限公司,上海200086

出　　处：《同济大学学报（自然科学版）》2006年第12期1647-1650,1661,共5页Journal of Tongji University:Natural Science

基　　金：国家"八六三"高技术研究发展计划资助项目(2002AA601130);国家科技攻关计划重大资助项目(2003BA808A17)

摘　　要：以实验室制备的氧化铁、经硝酸和草酸铁改性的活性炭12×40(AC 1)为原料,分别制成两种氧化铁/活性炭复合吸附材料(FeO/AC-H和AC/Fe2(C2O4)).通过X射线衍射仪、氮气吸附仪、扫描电子显微镜和X射线光谱仪进行吸附的表观特性和物化性能分析,结果表明,活性炭的表面物质有磁铁矿(Fe3O4)、磁赤铁矿(γ-Fe2O3)、赤铁矿(α-Fe2O3)和针铁矿(α-FeO(OH)),而且这些物质的存在对活性炭的比表面积影响不大.采用静态吸附实验方法,用AC 1,FeO/AC-H和AC/Fe2(C2O4)三种吸附剂吸附去除水中砷,获得了吸附等温平衡数据,用Langmuir模型和Fre-undlich模型进行回归分析.结果表明,FeO/AC-H和AC 1对As(Ⅴ)的吸附更符合Langmuir吸附模型,而复合吸附剂AC/Fe2(C2O4)对As(Ⅴ)的吸附比较符合Freundlich吸附模型.Iron oxide/activated carbon composite adsorbent materials （FeO/AC-H and AC/Fe2（C2O4））were prepared with special into oxide and HNO3 and Fe2（C2O4）·5H2O modified coal-based activated carbon 12 × 40 （AC1）. Apparemnt characters and physical chemistry performances of adsorbent were studied by the means of X-ray diffraction, nitrogen adsorption, scan electronic microscope, and X-ray photoelectron spectrosopy. The results suggest that the main phases of the surface area are magnetite （Fe3O4）, maghemite （γ-Fe2O3）, hematite （α-Fe2O3） and goethite （α-FeO（OH））. N2 adsorption measurements show that the presence of iron oxides does not significantly affect the surface area. The removal of arsenic （V） flora aqueous solutions was evaluated with three different sorption materials： AC1, FeO/AGH and AC/Fe2 （C204）. Batch experiments for adsorption were perfortrmed and the data of adsorption equilibrium were obtained. The pattern of adsorption of As（V） with the three different adsorbents indicates that the FeO/AC-H composites and AC1 better match the Langmuir adsorption model, and the AC/Fe2（G204） matches Freundlich model.

关 键 词：改性活性炭 内分泌干扰物 氧化铁 砷 净水工程 

分 类 号：TU991.2[建筑科学—市政工程]