ORIGINALARTICLEFeaturesof90SrbehaviorinCrimeanlakeswithdifferentsalinityoftheirwaterenvironmentN.Yu.Mirzoeva1•S.I.Arkhipova1•V.Yu.Proskurnin1•O.N.Miroshnichenko1•I.N.Moseichenko1Received:21June2022/Revised:23August2022/Accepted:12September2022/Publishedonline:8November2022©TheAuthor(s),underexclusivelicencetoSciencePressandInstituteofGeochemistry,CASandSpringer-VerlagGmbHGermany,partofSpringerNature2022AbstractThecomparativestudyoftechnogenic90SrbehaviorfeaturesinCrimealakes’ecosystemswithdif-ferentlevelsofsalinitywascarriedoutin2016–2021.Twosourcesof90Srinputwereidentifiedforallthestudiedlakes:theprimarysourceconcernedwithatmosphericfalloutimmediatelyaftertheChernobylNPPaccidentandthesecondarylong-terminputofthisradionuclidebywaterway.Thehalf-lifeofthe90SrconcentrationinthewaterofthehypersalineLakeSasyk-Sivashwasestimatedtovaryfrom0.8to1.1yearsaftertheclosureoftheNorthCrimeanCanal(NCC).Biogeochemicalprocessesinthelakeundertheabsenceofthesecondarysourceoftheradionuclideinputwereshowntodecreaseinthe90Srresidencetimeinthewatercolumnby131times.Forbrackishwaterbodies,asignificantfactorinfluencingtheradionuclideconcentrationinecosystemsoflakeswasthepHoftheirwater,whileforhypersalinelakesthelevelofwatersalinitywasthemainfactordetermining90Srbehavior.Theconcentrationof90Srinbottomsedimentsofstudiedlakesdependedmainlyonthisradionuclidecon-centrationinawaterenvironment.Calculated90Srdistri-butionfactors(Kd)forstudiedlakes’bottomsedimentsvariedinarangeofn·100÷n·102forhypersalinelakesandofn·101÷n·102forlakeswithbrackishwaters.DuetotheclosureoftheNCC,the90Srredistributiontookplaceinlakeecosystemsonlyunderthegeochemicalprocesseswithinthewaterbodiesthemselves.TheresultsobtainedinthisworkareofparticularimportanceasastartingpointorabasisforfurtherradioecologicalstudiesoftheCrimeaninlandwatersafterthereopeningoftheNCCandtheDnieperwatersre-enteringtheterritoryofCrimeain2022afterthe8yearsoftheirabsence.Keywords90Sr·Saltlakes·Water·Bottomsediments·ChernobylNPPaccid...
