高铁酸钾抑制底泥磷释放效能及机制

高铁酸钾抑制底泥磷释放效能及机制摘要：本研究旨在探究高铁酸钾对底泥磷释放的抑制效果及其机制。通过调节不同高铁酸钾浓度下的底泥pH值、温度和盐度等因素，运用离子色谱法、紫外光谱法等实验手段，对磷释放过程中的离子交换、配位络合、物理吸附等环节进行探究，并对底泥有机质对磷释放的影响进行分析。结果表明，高铁酸钾显著抑制了底泥磷的释放，其抑制率随着高铁酸钾浓度升高而升高。通过分析底泥磷释放的影响因素，发现高铁酸钾主要通过改变底泥的pH值，限制磷的游离度和阻止磷的络合吸附，从而抑制了底泥磷的释放。另外，底泥中有机质含量对底泥磷释放有一定的促进作用。本研究对于底泥污染控制及高铁酸钾的应用提供了参考。

关键词：高铁酸钾；底泥磷释放；pH值；离子交换；配位络合；物理吸附；有机质

Abstract:Theaimofthisstudyistoexploretheinhibitioneffectandmechanismofpotassiumferrateonthereleaseofphosphorusfromsediment.ByadjustingthepHvalue,temperature,andsalinityofsedimentatdifferentconcentrationsofpotassiumferrate,andusingexperimentalmethodssuchasionchromatographyandultravioletspectroscopy,theionexchange,coordinationcomplexation,physicaladsorptionandotherlinksinthephosphorusreleaseprocesswereexplored,andtheinfluenceoforganicmatterinsedimentonphosphorusreleasewasanalyzed.Theresultsshowedthatpotassiumferratesignificantlyinhibitedthereleaseofphosphorusfromsediment,anditsinhibitionrateincreasedwiththeincreaseofpotassiumferrateconcentration.Byanalyzingtheinfluencingfactorsofphosphorusrelease,itwasfoundthatpotassiumferratemainlyinhibitedthereleaseofphosphorusfromsedimentbychangingthepHvalueofsediment,limitingthefreedegreeofphosphorusandpreventingthecomplexationandadsorptionofphosphorus.Inaddition,thecontentoforganicmatterinsedimenthasacertainpromotingeffectonthereleaseofphosphorusinsediment.Thisstudyprovidesreferenceforsedimentpollutioncontrolandtheapplicationofpotassiumferrate.

Keywords:potassiumferrate;phosphorusreleaseinsediment;pHvalue;ionexchange;coordinationcomplexation;physicaladsorption;organicmatterPotassiumferrateshowedasignificanteffectonthereleaseofphosphorusinsediment.Astheconcentrationofpotassiumferrateincreased,thepHvalueofthesedimentalsoincreased,whichaffectedtheionexchangeandreleaseofphosphorus.Theadditionofpotassiumferratereducedtheadsorptionofphosphorusinthesedimentandpreventedtheformationofcoordinationcomplexesbetweenphosphorusandmetalions.

However,theeffectofpotassiumferrateonphosphorusreleaseinsedimentwaslimitedbythefreedegreeofphosphoruspresentinthesediment.Thehigherthecontentofadsorbedphosphorus,thelowertheeffectofpotassiumferrateonphosphorusrelease.Moreover,thecontentoforganicmatterinsedimenthadacertainpromotioneffectonphosphorusrelease,whichneedsfurtherstudy.

Insummary,theapplicationofpotassiumferratecouldeffectivelycontrolphosphoruspollutioninsediment.ThemechanisminvolvedpHregulation,ionexchange,andpreventionofcomplexationandadsorption.ThestudyprovidesatheoreticalbasisfortheapplicationofpotassiumferrateinsedimentpollutioncontrolFurthermore,thestudyalsohighlightstheimportanceofunderstandingthechemicalandphysicalpropertiesofsedimentincontrollingphosphoruspollution.Thecomplexnatureofsediment,includingitsheterogeneouscompositionanddiversephysicalandchemicalproperties,significantlyaffectstheinteractionsbetweenpotassiumferrateandsediment.Assuch,futurestudiesshouldinvestigatetheoptimizedconditionsforapplyingpotassiumferrateindifferenttypesofsediment.

Anotheraspectrequiringfurtherinvestigationisthepotentiallong-termeffectsofpotassiumferrateonsedimentquality.Thestudyonlyinvestigatedtheshort-termeffectsofpotassiumferrateonphosphorusrelease,anditremainsunclearwhethertheapplicationofpotassiumferratecouldleadtosecondarypollutionorotherenvironmentalimpactsovertime.Thus,futureresearchshouldfocusonthelong-termeffectsofpotassiumferratetreatmenttodetermineitssustainabilityandviabilityasasedimentpollutioncontrolmeasure.

Overall,thestudyprovidesapromisingsolutionforthecontrolofphosphoruspollutioninsedimentbydemonstratingtheeffectivenessandunderlyingmechanismsofpotassiumferrate.Theresultssuggestthatpotassiumferratehaspotentialasaninnovativeandsustainablesedimentremediationmethod,whichcouldcontributetotheprotectionandrestorationofaquaticecosystems.However,morestudiesareneededtoevaluateitslong-termeffects,optimizationconditions,andeconomicfeasibilityforlarge-scaleapplicationPotassiumferratehasbeenshowntohavepromisingresultsintheremediationofphosphoruspollutioninsediment.Themechanismbehindthiseffectivenessliesintheabilityofpotassiumferratetooxidizeandprecipitatephosphorustoforminsolubleironphosphatecompounds.Thesecompoundsarethenimmobilizedinthesediment,reducingtheiravailabilityforuptakebyplantsandalgae.

Oneofthemainadvantagesofpotassiumferrateisitssustainabilityasitdoesnotproduceanyharmfulbyproductsthatcouldcontributetosecondarypollution.Moreover,itisefficientatlowconcentrationsandcanbeeasilydosedintowaterbodies.

However,somechallengesneedtobeaddressedforsuccessfulapplicationofpotassiumferrateatalargescale.Forinstance,theoptimaldosageandadministrationfrequencyneedtobedeterminedfordifferentsedimenttypesandphosphorusconcentrations.Additionally,thelong-termeffectsofpotassiumferrateonsedimentandaquaticecosystemsneedtobeevaluatedovertime.

Cost-effectivenessisanotherfactortoconsiderforlarge-scaleapplicationofpotassiumferrate.Furtherstudiesarerequiredtodeterminethecost-benefitratioofutilizingpotassiumferratetoremediatephosphoruspollutioninsediment,particularlyincomparisontootherconventionalmethods.

Inconclusion,potassiumferratepresentsapromisingsolutionforthecontrolofphosphoruspollutioninsediment.Itssustainability,effectiveness,andeasyapplicationmak