简介:Anilineisatoxicwaterpollutantdetectedindrinkingwaterandsurfacewater,andthischemicalisharmfultobothhumanandaquaticlife.Adielectricbarrierdischarge(DBD)reactorwasdesignedinthisstudytoinvestigatethetreatmentofanilineinaqueoussolution.Dischargecharacteristicswereassessedbymeasuringvoltageandcurrentwaveforms,capturinglightemissionimages,andobtainingopticalemissionspectra.Theeffectsofseveralparameterswereanalyzed,includingtreatmentdistance,dischargepower,DBDtreatmenttime,initialpHofanilinesolutions,andadditionofsodiumcarbonateandhydrogenperoxidetothetreatment.Anilinedegradationincreasedwithincreasingdischargepower.Underthesameconditions,higherdegradationwasobtainedatatreatmentdistanceof0mmthanatothertreatmentdistances.Atadischargepowerof21.5W,84.32%ofanilinewasremovedafter10minofDBDtreatment.InitialpHsignificantlyinfluencedanilinedegradation.Addingacertaindosageofsodiumcarbonateandhydrogenperoxidetothewastewatercanacceleratethedegradationrateofaniline.PossibledegradationpathwaysofanilinebyDBDplasmaswereproposedbasedontheanalyticaldataofGC/MSandTOC.
简介:Thermalplasmawasappliedforthetreatmentofcokewastewatersludgederivedfromthesteelindustryinordertoinvestigatethefeasibilityofthesafetreatmentandenergyrecoveryofthesludge.A30kWplasmatorchsystemwasappliedtostudythevitrificationandgasproductionofcokewastewatersludge.Toxicityleachingresultsindicatedthatthesludgetreatedviathethermalplasmaprocessconvertedintoavitrifiedslagwhichresistedtheleachingofheavymetals.CO2wasutilizedasworkinggastostudytheproductionandheatenergyofthesyngas.Theheatingvalueofthegasproductsbythermalplasmaachieved8.43kJ/L,indicatingthefurtherutilizationofthegasproducts.Consideringtheutilizationofthesyngasandrecoveryheatfromthegasproducts,theestimatedtreatmentcostofcokewastewatersludgeviaplasmatorchwasabout0.98CNY/kgsludgeintheexperiment.Bypreliminaryeconomicanalysis,thedehydrationcosttakesanimportantpartofthetotalsludgetreatmentcost.Thetreatmentcostofthecokewastewatersludgewith50wt.%moisturewascalculatedtobeabout1.45CNY/kgsludgedrybasis.Thetreatmentcostofthecokewastewatersludgecouldbeeffectivelycontrolledbydecreasingthewatercontentofthesludge.Thesefindingssuggestthataneconomicdewateringpretreatmentmethodcouldbecombinedtocutthetotaltreatmentcostinanactualtreatmentprocess.
简介:软X射线计量标准的建立和软X射线探测器标定是目前国内急需解决的课题,本文简单介绍了两套北京同步辐射软X射线装置,它们主要用于软X射线光学元件测量和软X射线探测元、器件的标定。另外给出了近年来在软X射线测量装置上开展的计量标准和探测器标定方面的研究结果。
简介:Tosolvetheproblemonthemicrostructuralcharacterizationofmetallicsuperlattices,takingtheNiFe/Cusuperlatticesasexample,weshowthatthesturcturesofmetallicsuperlatticescanbecharacterizedexactlybycombininglow-angleX-raydiffractionwithhigh-angleX-raydiffraction.First,wedetermineexactlythetotalfilmthicknessbyastraightforwardandprecisemethodbasedonamodifiedBragglawfromthesubsidiarymaximaaroundthelow-angleX-raydiffractionpeak.Then.bycombiningwiththesimulationofhigh-angleX-raydiffraction.weobtainthesturcturalparameterssuchasthesuperlatticeperiod,thesublayerandbufferthickness,Thischaracterizationprocedureisalsoapplicabletoothertypesofmetallicsuperlattices.
简介:介绍了利用北京同步辐射实验室的全反射X射线荧光谱仪测量生物细胞样品的可行性。并用此谱仪测量了正常的和辐照的小白鼠小肠细胞的痕量元素含量,发现K、Ca、Fe等元素含量有明显的提高,Cu元素含量明显降低,Mn元素含量变化不大,Zn元素含量基本稳定,并讨论了其在临床医学上的重要价值。
简介:InsituhighpressureopticalabsorptionmeasurementsofsulfurhavebeencarriedoutbyusingDACdevicewithaTASCOV-550UV-VISspectrophotometeratpressuresupto41.6GPa.Thecurvesofabsorptionedgevspressurewereobtained.inwhichtherearetwoturningpointsatabout5and12GPa,correspondingtotwochangesofcolourintheopticalobservation:oneisfromyellowtoredandtheotherfromredtoblackat5-6\5and10-12GPa,respectively.Theabsorptionedgereachesabove800nmwhenthepressureisincreasedto23GPa.Thesturctureandphasetransitionshavealsobeeninvestigatedbyusinginsituhighpressureenergy-dispersivex-raydiffractionwithsynchrotronradiationatpressuresupto33.7GPa.Nostructurephasetransitionoccursat5-6GPa.butthereisanewhigh-pressurephase,causedprobablybythereorientationororderingofS8.