Journal of Korean Society on Water Environment (한국물환경학회지)

Korean Society on Water Environment (한국물환경학회)
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Water Quality Variation and Corrosion Index Characteristics of Underground Reservoir in Apartment

공동주택 지하저수조의 수질변화 및 부식성 특성

  • JunYoung, Jang (Department of Environment Engineering, Seoul National University of Science and Technology) ;
  • JooWon, Kim (Department of Environment Engineering, Seoul National University of Science and Technology) ;
  • YuHoon, Hwang (Department of Environment Engineering, Seoul National University of Science and Technology) ;
  • KiPal, Kim (K-1ecotech Co,, Ltd) ;
  • HyunSang, Shin (Department of Environment Engineering, Seoul National University of Science and Technology) ;
  • ByungRan, Lim (Department of Environment Engineering, Seoul National University of Science and Technology)
  • 장준영 (서울과학기술대학교 환경공학과) ;
  • 김주원 (서울과학기술대학교 환경공학과) ;
  • 황유훈 (서울과학기술대학교 환경공학과) ;
  • 김기팔 ((주)케이원에코텍) ;
  • 신현상 (서울과학기술대학교 환경공학과) ;
  • 임병란 (서울과학기술대학교 환경공학과)
  • Received : 2022.08.18
  • Accepted : 2022.10.25
  • Published : 2022.11.30
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Abstract

To maintain water quality after water treatment, monitoring whether the quality of treated tap water quality changes is essential. However, current investigations are insufficient to prevent secondary contamination in drinking water supply systems. This study investigated Gyeonggi's e apartment where a red water problem occurred and monitored the water quality and corrosiveness of the overall water supply system to the apartment from June 2021 to April 2022. In a comparison of drinking water quality after water treatment and the influent of the reservoir, turbidity and heavy metal concentrations were increased and residual chlorine was decreased due to increases in temperature. Correlation analysis and principal component analysis (PCA) indicated that a low level of residual chlorine may cause the abscission of Mn2+ and Fe2+ through microorganism activation, which also causes a high level of turbidity. The corrosion index (LI) in the influent of the reservoir tank was increased due to Ca2+ and temperature. These results indicate that the corrosiveness of drinking water and the deterioration of drinking water quality were mainly increased between the drinking water treatment plant and the reservoir tank's influent. The findings provide clear evidence that it is essential to manage water supply systems and reservoir tanks to prevent the secondary contamination of drinking water.

Keywords

Acknowledgement

This study was carried out with the support of the Korea Research Foundation's original technology development project (2020M3E9A1113438) and the fundamental research project (NRF-2020R1A6A1A03042742).

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