대도시 주변 강과 하천에서 인위적기원 gadolinium의 유입

DC Field Value Language
dc.contributor.author 김인태 -
dc.date.accessioned 2020-07-01T03:18:27Z -
dc.date.available 2020-07-01T03:18:27Z -
dc.date.created 2020-02-11 -
dc.date.issued 2019-12-12 -
dc.identifier.uri https://sciwatch.kiost.ac.kr/handle/2020.kiost/21025 -
dc.description.abstract We measured dissolved rare earth elements (REEs) in the water samples from Shihwa Lake (SL), which was assumed to be highly polluted, as well as in the downstream portion of the Han River (HR), which runs through, Seoul, Korea. Among the investigated REEs, only Gadolinium (Gd) was found to be significantly enhanced after REE concentrations were shale-normalized (SN). The calculated Gd anomaly (Gd/Gd* = 3×GdSN/(SmSN + 2×TbSN)) was about 1.5±0.1 (n=16) in SL and 1.6±0.3 in HR (n=26) water relative to other types of natural water such as groundwater, seawater, and river water in uncontaminated areas (Gd/Gd*~1.2, n>400). These significant Gd anomalies seem to be due to the inputs of anthropogenic Gd (Gdanth),especially by the use of Gd-based contrast agents for magnetic resonance imaging (MRI) tests from a number of hospitals and medical institutes surrounding our study areas. The Gdanth inventory was estimated to be 190±80 g and 680±360 kg Gd in SL and the HR (watersheds in our study area), respectively. The Gdanth flux to the Yellow Sea from the HR is estimated to be 530±330 g Gd day-1. Overall, these results suggest that quantitative evaluation of man-made REEs for associated human risk assessments are needed, because considerable amounts of REEs are now used by modern high-tech industries. -
dc.description.uri 1 -
dc.language English -
dc.publisher American Geophysical Union -
dc.relation.isPartOf 2019 AGU Fall Meeting -
dc.title 대도시 주변 강과 하천에서 인위적기원 gadolinium의 유입 -
dc.title.alternative Substantial gadolinium enrichments in lake and river near metrocities in Korea -
dc.type Conference -
dc.citation.conferencePlace US -
dc.citation.endPage 1 -
dc.citation.startPage 1 -
dc.citation.title 2019 AGU Fall Meeting -
dc.identifier.bibliographicCitation 2019 AGU Fall Meeting, pp.1 -
dc.description.journalClass 1 -
Appears in Collections:
Marine Environmental & Climate Research Division > Marine Environmental Research Center > 2. Conference Papers
Files in This Item:
There are no files associated with this item.

qrcode

Items in ScienceWatch@KIOST are protected by copyright, with all rights reserved, unless otherwise indicated.

Browse