SequestrationofPhosphorusfromWastewaterbyCementbasedorAlternativeCementitiousMaterials.pdf
Cement-basedandalternativecementitiousmaterialsweretestedinthelaboratoryfortheircapabilityofremovingphosphatefromwastewater.TheresultsdemonstratedthatbothLangmuirandFreundlichadsorptionisothermsweresuitablefordescribingtheadsorptioncharacteristicsofthesematerials.Amongthefourtypesoffiltermediatested,thecement-basedmortarAhasthehighestvalueofmaximumadsorption(30.96mgg-1).TheP-bondingenergy(KL)andadsorptioncapacity(K)exhibitedapositivecorrelationwiththetotalcontentofA1203andFe203ineachmortar.ThemaximumamountofPadsorbed(Qm)andadsorptionintensity(1/n)exhibitedapositivecorrelationwiththeCaOcontentineachmortar.Forthreeofthem,theP-removalrateswereinexcessof94percentforphosphorusconcentrationsrangingfrom20to1000mgL-1.Theunderlyingmechanismswereexaminedusingfieldemissionscanningmicroscopy(FESEM),coupledwithenergy-dispersiveX-rayspectroscopy(EDX)andX-raypowderdiffraction(XRD).Theresultsrevealthattheremovalofphosphatepredominantlyfollowedaprecipitationmechanisminadditiontoweakphysicalinteractionsbetweenthesurfaceofadsorbentfiltermediaandthemetallicsaltsofphosphate.Theuseofcement-basedoralternativecementitiousmaterialsintheformofgroundpowdershowsgreatpromisefordevelopingacost-effectiveandenvironmentallysustainabletechnologyforP-sequestrationandforwastewatertreatment.
作者：XinjunWang JidingChen YapingKong XianmingShi
作者单位：CorrosionandSustainableInfrastructureLaboratory,WesternTransportationInstituteandCivilEngineeringDepartment,POBox174250,CollegeofEngineering,MontanaStateUniversity,BozemanMT59717-4250,USA;LaboratoryofRoadEcologyandPollutionEmergencyResponse,ResearchCenterforEnvironmentalProtectionandTransportationSafety,ChinaAcademyofTransportationSciences,Beijing,Beijing100029ChinaLaboratoryofRoadEcologyandPollutionEmergencyResponse,ResearchCenterforEnvironmentalProtectionandTransportationSafety,ChinaAcademyofTransportationSciences,Beijing,Beijing100029ChinaCorrosionandSustainableInfrastructureLaboratory,WesternTransportationInstituteandCivilEngineeringDepartment,POBox174250,CollegeofEngineering,MontanaStateUniversity,BozemanMT59717-4250,USA
母体文献：第二届全国绿色公路发展技术交流会暨长白山区鹤大高速公路科技示范工程技术交流会论文集
会议名称：第二届全国绿色公路发展技术交流会暨长白山区鹤大高速公路科技示范工程技术交流会
会议时间：2016年8月1日
会议地点：吉林
主办单位：中国公路学会
语种：chi
分类号：
关键词：
在线出版日期：2019年4月17日
基金项目：
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