α-hch的多介质归趋行为及风险评价研究——以黄河头道拐冰封期为例

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1、MultimediaBehaviorandRiskAssessmentofGc—HCH—TakeTheIceboundSeasonatTheToudaoguaiSectionofTheYellowRiverasanexampleAbstractPersistentorganicpollutants(POPs)ontheecosystemandhumanhealthhazardshavecausedwidespreadconcern．theToudaoguaiSectionof刀圮YellowRiverseriouslypollutedbyPOPs，andbecauseofitslo

2、ngfrozenperiod，highsedimentconcentrationandotherspecialreason，maketheresearchonfrozenperiodinthesegmentPOPsbecomeparticularlyimportant．Inthispaper，theToudaoguaiasstudyarea，frozenperiodasstudyperiod，Q-HCHasatargetpollutant，theprincipleoftheestablishmentofthemultimediafugacitymodel，withair，ice，w

3、ater，suspendedsediment，isthemainphaseestablishedtheToudaoguaiSectionofTheYellowRiverfrozenperiodQ-HCHIIImultimediafugacitymodel．simulationthetransferoftheToudaoguaiSectionofTheYellowRivera—HCHintheenvironmentofeachmediumfatebehavior；atthesametime．theToudaogtmiSectionofnleYellowRiverfrozenwater

4、Ⅱ一HCHaStheresearchobject，fromthewater，fishandskincontactwaysrespectively，flowconvectionLing—Ling，Linglater，midstreamice，ice，iceearlymiddlelate，meltingglacialhealthriskassessment．Conclusionsareasfollows：The值一HCHconcentrationofAtmosphericiSthesmallest；the旺．HCHconcentrationofSedimentisthemaximum．

5、a-HCHfromgastoicemigrationfluxisthelargest，followediswatertoice；thedegradationofd-HCHinthesedimentisminimum，sedimentisthemainrepositoryofQ—HCH；thedegradationof伐一HCHiniceismaxinmm，withicephasephotocatalyticdegradationisthemainwaytodisappearfromtheToudaoguaiSectionofTheYellowRiver．TheToudaoguaiS

6、ectionofTheYellowRiverfrozenwatera．HCHtotalcancerriskis2．75×10-5；thetotalriskindexvalueof1％，thetotalnoncarcinogenicriskis2．96x10一．thetotalriskindexvalueof99％．iSmainlvresponsibleforthetotalrisk．Fishapproachisthemaximumriskinthreeways，themainwaysofrisk，respectivelyofthetotalcancerrisk，totalnonca

7、ncerrisk84％，97％．TheIotalriskoffrozenwaterⅡ．HCHindexinflowLinglaterismaximum，iceperiodisminimum．TheToudaoguaiSectionofTheYellowRiverfrozenwater旺．HCHcancerandnoncancerriskarewithintherangerecommendedbytheUSEPA，almostnohamatohumanbody．Keyw