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초록
To investigate corrosivity characteristics of tap water in Korea, Langelier index (LI) of 30 multi-regional water treatment plants (WTPs) were evaluated. Weekly LI values of 30 WTPs were all negative, which means tap water in Korea might be very corrosive. Maximum LI decrease through water treatment processes was 0.95 under no additional corrosion control process. Based on the correlation results between LI and tap water qualities, pH and calcium concentration were confirmed as major parameters for LI control. Addition of calcium hydroxide with CO_2 or calcium hydroxide or sodium hydroxide can be chosen based on water quality. Continuous monitoring of LI and related parameters is recommended in water distribution system.
키워드
Langelier index; internal corrosion; corrosion control; tap water; water treatment; water quality monitoring; 랑게리아 지수; 내부부식; 부식제어; 수돗물; 정수처리; 수질모니터링
- 제목
- 국내 수돗물의 부식성 특성 및 개선방안
- 제목 (타언어)
- Characteristics and Improvement of Tap Water Corrosivity in Korea
- 저자
- 김진근; 김영관
- 발행일
- 2011-10
- 유형
- Y
- 저널명
- 상하수도학회지
- 권
- 25
- 호
- 5
- 페이지
- 731 ~ 739