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1、第34卷第12期同济大学学报(自然科学版)Vol.34No.122006年12月JOURNALOFTONGJIUNIVERSITY(NATURALSCIENCE)Dec.2006氧化铁/活性炭复合吸附材料去除水中砷的研究1121张巧丽,高乃云,乐林生,陈洪斌(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)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(AC1)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
2、、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AC1,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Fre2undlich模型进行回归分析.结果表明,FeO/AC-H和AC1对As(Ⅴ)的吸附更符合Langmuir吸附模型,而复合吸附剂AC/Fe2(C2
3、O4)对As(Ⅴ)的吸附比较符合Freundlich吸附模型.关键词:改性活性炭;内分泌干扰物;氧化铁;砷中图分类号:X506文献标识码:A文章编号:0253-374X(2006)12-1647-04StudiesonRemovalofArsenicfromAqueousSolutionswithIronOxide/ActivatedCarbonCompositeMaterials1121ZHANGQiaoli,GAONaiyun,LELinsheng,CHENHongbin(1.StateKeyLaboratoryofPollutionControl
4、andResourcesReuse,TongjiUniversity,Shanghai200092,China;2.ShanghaiWaterworksShibeiCo.Ltd.,Shanghai200086,China)Abstract:Ironoxide/activatedcarboncompositeadsorbentmaterials(FeO/AC2HandAC/Fe2(C2O4))werepreparedwithspecialironoxideandHNO3andFe2(C2O4)·5H2Omodifiedcoal2basedactivate
5、dcarbon12×40(AC1).ApparentcharactersandphysicalchemistryperformancesofadsorbentwerestudiedbythemeansofX2raydiffraction,nitrogenadsorption,scanelectronicmicroscope,andX2rayphotoelectronspectroscopy.Theresultssuggestthatthemainphasesofthesurfaceareaaremagnetite(Fe3O4),maghemite(γ2
6、Fe2O3),hematite(α2Fe2O3)andgoethite(α2FeO(OH)).N2adsorptionmeasurementsshowthatthepresenceofironoxidesdoesnotsignificantlyaffectthesurfacearea.Theremovalofarsenic(V)fromaqueoussolutionswasevaluatedwiththreedifferentsorptionmaterials:AC1,FeO/AC2HandAC/Fe2(C2O4).Batchexperimentsfo
7、radsorptionwereperformedandthedataofadsorptionequilibriumwereobtained.ThepatternofadsorptionofAs(V)withthethreedifferentadsorbentsindicatesthattheFeO/AC2HcompositesandAC1bettermatchtheLangmuiradsorptionmodel,andtheAC/Fe2(C2O4)matchesFreundlichmodel.Keywords:modifyactivatedcarbon
8、;endocrinedisruptors;ironoxide;arsenic收稿日期:2005
