| Title |
Water Quality Variation and Corrosion Index Characteristics of Underground Reservoir in Apartment |
| Authors |
장준영 ( JunYoung Jang ) ; 김주원 ( JooWon Kim ) ; 황유훈 ( YuHoon Hwang ) ; 김기팔 ( KiPal Kim ) ; 신현상 ( HyunSang Shin ) ; 임병란 ( ByungRan Lim ) |
| DOI |
https://doi.org/10.15681/KSWE.2022.38.6.275 |
| Keywords |
Corrosion index; Drinking water; Turbidity; Underground reservoir; Water quality |
| 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. |