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ID:31977854
大小:1.65 MB
页数:62页
时间:2019-01-30
《丙酮—苯酚水溶液在活性炭上吸附平衡的研究》由会员上传分享,免费在线阅读,更多相关内容在学术论文-天天文库。
1、摘要活性炭吸附法广泛用于有机性废水的处理。本文研究了水溶液中丙酮、苯酚单组分在活性炭上的吸附平衡以及双组分的竞争吸附,为吸附法处理该类废水提供参考数据。实验测定了30℃、40℃、50"(2下水溶液中丙酮、苯酚在活性炭1#上的单组分吸附平衡数据与30℃在活性炭错上的数据,数据用Freundlich方程拟合效果都较好。相同实验条件下活性炭对苯酚的吸附效果优于丙酮。其中,30℃在活性炭1撑上的单组分吸附,当初始浓度小于59/L,同初始浓度的两组分平衡吸附量较接近,但随着初始浓度的增加,两者的差异明显增大。在相同实验条件下,具有更丰富微孔结构的活
2、性炭1群的吸附效果优于旃,表明该两种活性炭吸附丙酮、苯酚时,微孔起主要作用。此外,本文还测定了一系列30"C下以活性炭嚣为吸附剂的双组分平衡数据。该体系中丙酮、苯酚存在竞争吸附作用,固定一种组分初始浓度,比较一系列另一组分的吸附等温曲线。结果表明,该体系中丙酮的存在对苯酚吸附的影响相对苯酚对于丙酮体系的影响要小,说明竞争吸附对不同组分的影响不同,对于具有较强吸附能力的组分,弱吸附组分的存在对其吸附影响相对较小。用多组分Freundlich方程拟合双组分平衡数据,拟合效果较好,得到适用于实验浓度范围内的竞争吸附方程。关键词:丙酮,苯酚,吸附
3、平衡,竞争吸附AbstractABSTRACTAdsorptiononactivatedcarboniswidelyusedinorganicwastewatertreatment.Inthispaper,adsorptionofsinglecomponentandcompetitiveadsorptionoftwosolutes,acetoneandphenol,onactivatedcarbonarestudiedtoprovidesomefundamentalinformationforfurtherapplications.For
4、singlecomponentadsorption,theadsorptionisothermsofacetoneandphenolweremeasuredat30℃,40℃,50℃onactivatedcarbon1,andat30℃onactivatedcarbon2.ThedatawerecorrelatedintermsofFreundlichequationsatisfactorily.Underthesameexperimentalcondition,theadsorptionamountofphenolisalwayshig
5、herthanthatofacetone.Thedifferenceinadsorptionquantitybetweenthetwocomponentsonactivatedcairn2at30℃issmallatlowconcentrations,suchasinitialconcentrationslowerthan59/L,andincreasessharplyastheconcentrationsincrease.Furthermore,activatedcarbon1withrichmicroporesadsorbsmores
6、olutethanactivatedcarbon2underthesamecondition,whichindicatesthedominantroleofmicroporesintheadsorptionofacetoneandphen01.Moreover,theadsorptionofhi-solutesolutionincludingacetoneandphenolonactivatedcarbon2at30"Cwasalsoinvestigated.Theeffectofcompetitiveadsorptiononeachso
7、lutewasstudiedbycomparingaseriesofisothermsofonesolutewiththesameinitialconcentrationoftheothef,andtheresultsshowedthatacetonehasleasinfluenceontheadsorptionofphenolthanphenoldoes,whichmeansthesolutewithlowadsorptioncapacitycontributesrelativelylesstothebi-soluteadsorptio
8、n.ThemulticomponentFreundlichequationmaydescribethebi—soluteexperimentalresultsreasonablywell.Ke
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