简介：Amovingboundarymodelunderconsideringthevolumechangeofsphericalresinbeadsduringionexchangeprocesseswasemployedtorecognizethemechanismsofreecoveringuraniumfromcarbonatesolutionsusingstronglybasicanionexchanger.Twoimportantfactors,swellingandionexchange,whichdirectlyaffecttheviolumeofionexchangersweretakenintoaccount.AnionexchangemechanismhasbeenfoundfortheforwardreactionPCl/[UO2(CO3)3]^4-,andisparticaldiffusiongoverningathighconcentrationofthecomplexanion.ThemechanismofRCl/U(VI)atpH5.5-7.5isachemicalreactiontakingplaceatthemovingboundaryoftheunreactednucleus.ForthereversereactionRnU/NaCl,theuranyltricarbonatecomplexanionintheresinphaseisreplacedbyCl^-ionswithanionexchangemechanismalwaydeterminedbyparticlediffusion.TheotherformsofuraniuminthesolidphaseloadedontheresinatpH5.5-7.5shouldbelongtonon-exchangeableuranium.ThemechanismofthereversereactionRnU/HClisalwayschemicalreactionwhichisnotrestrictedtothemovingboundaryoftheunreactedcore.

简介：Apracticalandeconmicalprocessforeffectivelyrecoveringuraniumfromcarbonatesolutionsispresented.TheuraniumcomplexesaremadeunstablebyadjustingthepHofmixedsolutionsofNa2CO3andNaHCO3toabout7-8byHCland/orNaOH.WithinthisrangeofpHvalue,thesuper-equivalentuptakeofuraniumcomparedwithexchangeofCl^-andUO2(CO3)3^4-canbeworkedout,thetotalfreeeenergychangetakesontheminimumvalue,thepredominantspeciesofuraniuminresinphasemaybeU2O7^2-exceptforalittleamountofUO2^2+.

简介：Thispaperintroducesanimprovednewmethodwhichisusedtorecoversilverassilvernitratebyionexchangefromthewasters.Inthismethod,wecanrecoversilvernitrate,onlybyusingakindofionexchangeresinandtwoionexchangeprocesses.Itcanreplacetheoriginalrecoverymethodinwhichtwokindsofionexchangeresinsandthreeionexchangeprocessesareneeded.Theresultissatisfied

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简介：有磅(50%)的polythiophene/polyoxymethylene-blend的Electrorheological性质和爬恢复行为/POM(50%)作文被调查。粒子尺寸，电导率和绝缘的价值被测量是24.77m，3.85獩爠慥瑣潩?湩琠敨物映敩摬

简介：TherecoveryofAubyactivatedcarbonfibers(ACFs)wascarriedoutina40mmdiameter,1200mmheightfluidizedbedTheratesofreactionofthefunctionalfiberswithAu3+inthepureaurumsolutionandintheaurum-containingwastewaterweremeasuredrespectivelyatthedifferentsolutionfiowrates,andcomparedwiththeresultsunderthestaticsolutionconditions.Experimentalresultsindicatedthatthereactionratesinfluidizationarenotablyhigherthanthoseinthestaticstateandincreasewiththeincreaseofsolutionflowrate.Itdemonstratesthatthethicknessoftheconcentrationboundarylayerisdecreasedandauniformtemperaturefieldisestablishedinthebedduetoincreasingoftheturbulentextentwiththerelativefiber/solutionvelocity.

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简介：新印离子的聚合物(IIP)被4-vinylpyridine(单体)的copolymerization综合，ethyleneglycoldimethacrylate(cross-linker)和2,2-azobis-isobutyronitrile(开始者)面对Cd2+和quinaldic酸(complexing代理人)。IIP和空白的聚合物的吸附能力分别地是45.0和6.2mgg1，这被发现。为不同二进制混合的印的聚合物的相对选择系数也是计算的。比作非印的聚合物(捏)，IIP为Cd(II)有更高的选择。IIP被使用一个简单的批抽取过程从水样品为镉抽取用作吸着剂。从IIP的Cd2+抽取和它的恢复上的不同参数的效果被使用试验性的设计方法论评估并且优化。优化吸附/解吸附作用过程被申请从真实的水样品的镉移动。获得的恢复证明这IIP能从水样品被用于踪迹镉离子的移动。

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