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담수 물환경 중 미세플라스틱 분석방법 및 검출에 대한 고찰
유혜원 ( Hye-weon Yu ),김윤석 ( Yun S. Kim ),이선홍 ( Sunhong Lee ),유지수 ( Jisu Yoo ),최재원 ( Jaewon Choi ) 한국환경분석학회 2020 환경분석과 독성보건 Vol.23 No.4
Theresearchscopeofmicroplasticsinaqueousenvironmenthasbeenexpandingfrominvestigationoftheirpresenceinoceanicwatertotheanalysisoftheirdistributionandbehaviorinfreshwater.However,researchinaqueousenvironmentislimitedbecausethelackofstandardizedevaluationtechniqueshasresultedintheuseofvariousunrelatedanalysismethods,thusmakingitdifficulttocomparedataonmicroplasticcontaminationanddistribution.Giventheirknownoceanicdistribution,asurveyontheoccurrenceofmicroplasticcontaminationandbehaviorinthefreshwaterenvironmentneedstobeconductedusingapreciseandaccuratestandardanalyticalmethod.Suchamethodwouldfacilitateasystematicanduniformapproachtodomesticandinternationalsafetymanagementandtothedevelopmentofimprovementplansneededtomitigatemicroplasticcontamination.Inthisstudy,wehavesummarizedthetechnologiesrecentlyappliedformicroplasticanalysisandfortheinvestigationofmicroplasticoccurrenceinthefreshwaterenvironment.Wehavealsopresentedareviewontheanalysisandevaluationofmicroplasticcontaminationinthefuture.
Analysis of microplastics in freshwater using thermal degradation method
Hye-Weon Yu(유혜원),Yun S. Kim(김윤석),SunHong Lee(이선홍),JiSu Yoo(유지수),Jaewon Choi(최재원) 환경독성보건학회 2021 한국독성학회 심포지움 및 학술발표회 Vol.2021 No.5
Due to the high production and consumption of plastic worldwide, it has been drawn great attention on microplastics(MPs) entered the environment, especially the aquatic environment. The research scope of MPs in aqueous environment has been expanding from investigation of their presence in oceanic water to the analysis of their source, occurrence or fate in freshwater, as well as potential environmental or health risks. In recent years, questions concerning very small plastic particles, nanoplastics(NPs, 1~1000 nm), have emerged. Since the current spectroscopic analytical methods developed for microplastics have a particle size limitation and cannot reach the submicrometer range, mass spectrometry combined with thermal degradation appears to be a promising technique to meet these challenges. Thermal degradation allows the conversion of macromolecules into low molecular weight fragments, which are then separated by gas chromatography and identified by a mass detector(GC-MS). Due to the limited sample weight and the maximum operating temperature of the thin capillary of Pyrolysis-GC/MS, in this study we present an automated thermal extraction desorption(TED)-GC/MS with a separation of the thermal extraction process which is suited for the analysis of MPs and NPs in a freshwater samples.
질소와 산소 안정동위원소비를 이용한 북한강수계 오염원 분포 특성
유지수 ( Jisu Yoo ),김윤석 ( Yun S. Kim ) 한국환경분석학회 2021 환경분석과 독성보건 Vol.24 No.4
Toidentifytheoriginofmajorpollutants,wedeterminedthedistributionofstableisotopesofδ<sup>15</sup>Nandδ<sup>18</sup>Oinnitrateextractedfromwatersamplesandsedimentscollectedattwo-monthintervalsduring2019-2020fromtheNorthHangangRiver,Korea.Stableisotoperatiosweremeasuredtoinvestigatenitrogencontaminationsourcesinthewatersystem.ThisstudydeterminedthattheNorthHangangRiverwasaffectedbysoilorganicmatter,livestockmanure,anddomesticsewage,andthatthestreamsandriversflowingintothemainstreamoftheNorthHangangRiverwereaffectedbydomesticsewageorlivestockmanure,resultinginrelativelyheavynitrogenisotoperatios.Generally,theconcentrationofnitratenitrogenwashigherintheinflowingstreams(Geumsan,Hongcheon,Mukhyeon,andGyeongandistrict)thanatthemainstream.Nitrogenpollutionduetochemicalfertilizersandsoilorganicmatterweredifferentin2019and2020,andtheratioofstablenitrogenisotopesdecreasedowingtotheinfluenceofrainfall.SedimentintheNorthHangangRiverhasbeenaffectedbyagriculturalsoilorganicmatterandlivestockmanure,showingthenecessitytonitrogenpollutantmanagement,particularlywithpollutantssuchassoilorganicmatterandlivestockmanure.