Anthropogenic gadolinium in lakes and rivers near metrocities in Korea SCIE SCOPUS

Cited 2 time in WEB OF SCIENCE Cited 2 time in Scopus
Title
Anthropogenic gadolinium in lakes and rivers near metrocities in Korea
Author(s)
Kim, Intae; Kim, Suk Hyun; Kim, Guebuem
KIOST Author(s)
Kim, In Tae(김인태)Kim, Suk Hyun(김석현)
Publication Year
2020-01-01
Abstract
We measured dissolved rare earth elements (REEs) in the water samples from Shihwa Lake (SL), which was assumed to be highly polluted, and 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 x Gd-SN/(Sm-SN + 2 x Tb-SN)) was about 1.5 +/- 0.1 (n = 16) in SL and 1.6 +/- 0.3 in the HR (n = 26) water relative to other types of natural water such as groundwater, seawater, and river water in uncontaminated areas (Gd/Gd* similar to 1.2, n > 400). These significant Gd anomalies seem to be due to the inputs of anthropogenic Gd (Gd-anth), especially from 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 amount of Gd-anth was estimated to be 190 +/- 80 g and 680 +/- 360 kg Gd in SL and the HR (watersheds in our study area), respectively. The Gd-anth flux to the Yellow Sea from the HR is estimated to be 530 +/- 330 g Gd d(-1). These results suggest that quantitative evaluation of anthropogenic REEs in natural waters near big cities is needed, because considerable amounts of REEs are now used by modern high-tech industries.
ISSN
2050-7887
URI
https://sciwatch.kiost.ac.kr/handle/2020.kiost/410
DOI
10.1039/c9em00304e
Bibliographic Citation
ENVIRONMENTAL SCIENCE-PROCESSES & IMPACTS, v.22, no.1, pp.144 - 151, 2020
Publisher
ROYAL SOC CHEMISTRY
Subject
RARE-EARTH-ELEMENTS; SUBMARINE GROUNDWATER DISCHARGE; TRACE-ELEMENTS; WATER; MICROCONTAMINANT; PRECONCENTRATION; SEAWATER; FLUXES; MRI
Type
Article
Language
English
Document Type
Article
Publisher
ROYAL SOC CHEMISTRY
Related Researcher
Research Interests

marine pollution management,marine biogeochemistry,marine environmental radioactivity,해양오염관리,해양물질순환,해양환경방사능

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