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《热活化和酸活化给水处理厂废弃铁铝泥的吸磷效果.pdf》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、第32卷第3期环境科学学报Vol.32,No.32012年3月ActaScientiaeCircumstantiaeMar.,2012高思佳,王昌辉,裴元生.2012.热活化和酸活化给水处理厂废弃铁铝泥的吸磷效果[J].环境科学学报,32(3):606-611GaoSJ,WangCH,PeiYS.2012.Effectsofphosphateremovalbythermal-andacid-activatedferricandalumwatertreatmentresiduals[J].ActaScientiaeCircumstant
2、iae,32(3):606-611热活化和酸活化给水处理厂废弃铁铝泥的吸磷效果*高思佳,王昌辉,裴元生北京师范大学环境学院,教育部水沙科学重点实验室,北京100875收稿日期:2011-05-30修回日期:2011-07-04录用日期:2011-07-28摘要:探讨了酸活化和热活化方式对给水厂废弃铁铝泥(ferricandalumwatertreatmentresiduals,FARs)吸附磷能力的影响.结果表明,酸活化和-1热活化均能提高FARs的磷吸附能力,其中经2mol·LHCl酸活化的FARs(AH2.0-FARs)和300℃
3、热活化的FARs(H300-FARs)取得最好的磷吸附效果.结合SEM和XRD表征技术对活化机制分析得知,两种活化方式均会使FARs变得疏松、多孔,从而提高FARs对磷的吸附能力.-1Langmuir和Freundlich两种模型均可很好地反映活化前后FARs的等温吸附过程,FARs对磷的理论饱和吸附量由活化前的20.48mg·g分别-1-1增加到22.86mg·g(AH2.0-FARs)和29.66mg·g(H300-FARs).低pH值有利于FARs对磷的吸附.此外,解吸附实验结果表明活化后的FARs能够更好地固定磷.因此,活化后
4、的FARs是一种相对更好的磷的吸附材料.关键词:给水厂废弃污泥;活化;磷;吸附;机制文章编号:0253-2468(2012)03-606-06中图分类号:X703文献标识码:AEffectsofphosphateremovalbythermal-andacid-activatedferricandalumwatertreatmentresiduals*GAOSijia,WANGChanghui,PEIYuanshengTheKeyLaboratoryofWaterandSedimentSciences,MinistryofEducat
5、ion,SchoolofEnvironment,BeijingNormalUniversity,Beijing100875Received30May2011;receivedinrevisedform4July2011;accepted28July2011Abstract:Inthisstudy,themethodsofthermalandacidactivationwereusedtoimprovephosphate(P)adsorptioncapabilityonferricandalumwater-1treatmentresid
6、uals(FARs).Theoptimalconditionsweredeterminedasthermalactivationat300℃andhydrochloricacidactivationat2mol·L.AccordingtotheresultsofSEMandXRDanalysis,higherPadsorptioncapabilityoftheactivatedFARswascausedbytheincreasedporosity.BothLangmuirmodelandFreundlichmodelcoulddesc
7、ribetheprocessofPadsorptionwell.ThemaximumPadsorptioncapacitiesoftheAH2.0-FARsand-1-1-1H300-FARswere22.86mg·gand29.66mg·g,respectively,whereasonly20.48mg·gfortherawFARs.LowpHwasfavorableforPadsorptionbytherawandactivatedFARs.Resultsofdesorptionstudiesfurtherindicatedtha
8、ttheP-bindingabilityoftheFARswasenhancedafteractivation.Therefore,theactivatedFARsaremoresuitableforPadsorptio
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