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Microbial Community Structures Related to Arsenic Concentrations in Groundwater Occurring in Haman Area, South Korea
함안지역 지하수의 비소(As) 함량과 미생물 군집 특성과의 연관성 검토
Econ. Environ. Geol. 2020 Dec;53(6):655-66
Published online December 31, 2020;  https://doi.org/10.9719/EEG.2020.53.6.655
Copyright © 2020 the Korean society of economic and environmental gelology.

Dong-Hun Kim1, Sang-Ho Moon1*, Kyung-Seok Ko1 and Sunghyun Kim2
김동훈1 · 문상호1* · 고경석1 · 김성현2

1Geologic Environment Division, Korea Institute of Geoscience and Mineral Resources (KIGAM), Daejeon 34132, Korea
2Geogreen21, 901 E&C Venture Dream Tower, Seoul 08376, Korea
1한국지질자원연구원 지질환경연구본부 지하수연구센터, 2(주)지오그린21
Received October 28, 2020; Revised December 14, 2020; Accepted December 16, 2020.
This is an Open Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/by-nc/3.0) which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited.
 Abstract
This study evaluated the characteristics of arsenic production in groundwater through microbial community analysis of groundwater contaminated with high arsenic in Haman area. Groundwater in Haman area is contaminated with arsenic in the range of 0-757.2 µg/L, which represents the highest arsenic contamination concentration reported in Korea as natural groundwater pollution source. Of the total 200 samples, 29 samples (14.5%) showed higher arsenic concentration than that of 10 µg/L, which is the standard for drinking water quality, and 8 samples (4%) found in wells with 80-100 m depth were above 50 µg/L. In addition, seven wells with arsenic concentration more than 100 µg/L located in the northern part of Haman. As a result of microbial community analysis for high arseniccontaminated groundwater, the microbial community compositions were significantly different between each sample, and Proteobacteria was the most dominant phyla with an average of 61.5%. At the genus level, the Gallinonella genus was predominant with about 12.8% proportion, followed by the Acinetobacter and Methermicoccus genus with about 7.8 and 7.3%, respectively. It is expected that high arsenic groundwater in the study area was caused by a complex reaction of geochemical characteristics and biogeochemical processes. Therefore, it is expected that the constructed information on geochemical characteristics and microbial communities through this study could be used to identify the origin of high arsenic groundwater and the development of its controlling technology.
Keywords : Haman area, groundwater, arsenic, microbial community, biogeochemical

 

December 2020, 53 (6)