渤海及邻近海域表层沉积物中多环芳烃的来源、生态风险和健康风险评估

《渤海及邻近海域表层沉积物中多环芳烃的来源、生态风险和健康风险评估》由会员上传分享，免费在线阅读，更多相关内容在学术论文-天天文库。

1、万方数据渤海及邻近海域表层沉积物中PAHs的来源、生态风险与健康风险评估ecologicalriskofPAHswasevaluatedusingorganiccarbon(OC)-normalizedanalysisandmeaneffectsrange-medianquotient(M—ERM—Q)analysis．Inaddition，carcinogenicrisk(CR)assessment，toxicandmutagenicequivalent(TEQandMEQ)analysisw

2、ereusedtoevaluatepotentialcarcinogenicity,toxicityandmutagenicityofPAHsinsedimentsfromBSandAA．Majorconclusionswereasfollowing：TwelvePAHsweredetectedinallsamples，excludingnaphthalene(NaP)，acenaphthylene(Acpy)，acenaphthene(Acp)andbenz(a)anthracene(BaP)

3、，whichwerenotdetectedinsomesamples．ThetotalconcentrationsofPAHsvariedfrom101．80to1211．81ng．g～，withameanvalueof388．85ng．g～．ThePAHslevelsinBSandAAweremoderatecomparedtootherareasinpublishedresearches．ThecorrelmionwaspoorbetweentheconcentrationsofPAHsan

4、dthetotalorganiccarbon(TOC)(R=0．31，n=42,P=0．045)，whichmayindicateanon—equilibriumadsorptionofPAHsonTOCinBSandAA．Theproportionof4~6ring—PAHsWasquitehigh．TheresultsofLMW／HMWanalysisindicatedthatPAHsweremainlyfrompyrogenicsources．Moleculardiagnosticindi

5、cesshowedthatPAHsweremainlyfrompetroleumsources，biomass，coalandpetroleumcombustion．Principalcomponentanalysis-multiplelinearregression(PCA—MLR)suggestedthatcoalcombustion，traffic(petroleumcombustion)，cokeproductionandpetroleumsourcescouldbetheprimary

6、PAHcontributors，accountingfor53．O％，32．6％，10．4％and4．0％ofthetotalconcentrations，respectively．AnalysiswithSQGs(ERM／ERLandTEL／PEL)indicatedthatacenaphthylene，fluorene，phenanthrene，fluoranthene，pyreneanddibenzo(a，h)anthracenemayoccasionallycauseadversebio

7、logicaleffectsinsomestations．TheOC-normalizedconcentrationsatallstations，exceptforstation35，wereblowTECvalues(thresholdeffectconcentration)inbothBSandAA，indicatingthatlowadverseecologicaleffectwaslikelytooccurwiththeexceptionofstation35whereoccasiona

8、lriskmayoccur．Themeaneffectsrange-medianquotient(M—ERM-Q)valuesatallstationsinBSandAAwerebelow0．1，suggestingarelativelylowprobabilityofcombinedbiologicaleffects．Inaddition，thecombinedbiologicaltoxicityofmultiplePAHsislowerthanV万方数据渤海及邻近海域表层沉积物中PAl-Is