Journal of Korean Society of Water and Wastewater (상하수도학회지)

The Korean Society of Water and Wastewater (대한상하수도학회)
권호 표지

Study on precipitate formation and the change of cations and anions in domestic bottled water

국내 시판 먹는샘물의 물성에 따른 이온성분의 변화 및 침전물 생성

  • 이은경 (대구광역시 보건환경연구원) ;
  • 장성일 (대구광역시 보건환경연구원) ;
  • 정연욱 (대구광역시 보건환경연구원) ;
  • 전성숙 (대구광역시 보건환경연구원) ;
  • 주명희 (대구광역시 보건환경연구원) ;
  • 이순애 (대구광역시 보건환경연구원) ;
  • 박종숙 (대구광역시 보건환경연구원)
  • Received : 2008.08.04
  • Accepted : 2008.10.10
  • Published : 2008.10.15
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Abstract

We analyzed contents of cations and anions for the domestic bottled drinking water. Results showed that total cation content was 45.81 mg/L and contained 40% of Ca. The content of cations were decreased in the order of Ca>Si>Na>Mg>K. Total anion content was 12.20 mg/L and contained 90% of ${SO_4}^{2-}$ and $Cl^-$. $F^-$ and $NO_{3-}N$ were a little contained. While Si content was reduced 2.3~75.7%(mean value:38.5%) after freezing, Ca content was reduced 45.2% after boiling. It showed that water containing higher Ca content was significantly decreased after boiling. Precipitates formed by freezing and boiling is composed of minerals such as Si and Ca. Compared to minerals from food intake, concentrations of minerals from water intake are expected to be less influenced. It is recommended Bottled Water that contains more than 20 mg/L of Ca(exceeding water-quality standard for turbidity) is safe to drink without thawing and boiling.

Keywords

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