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정수장 현장제조염소의 브로메이트와 클로레이트의 생성 특성연구

민병대,정현미,김태욱,박주현,Min, Byungdae,Chung, Hyenmi,Kim, Taewook,Park, Juhyun 대한상하수도학회 2015 상하수도학회지 Vol.29 No.5
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  ScienceON
  
  코리아스칼라
Although disinfection in drinking water treatment plants provides a safer water supply by inactivating pathogenic microorganisms, harmful disinfection by-products may be formed. In this study, the disinfectant, chlorine, was produced on-site from the electrolysis of salt (NaCl), and the by-products of the disinfection process, bromate and chlorate, were analyzed. The provisional guideline levels for bromate and chlorate in drinking water are $10{\mu}g/L$ and $700{\mu}g/L$, in Korea, respectively. Bromide salt was detected at concentrations ranging from 6.0 ~ 622 mg/kg. Bromate and chlorate were detected at concentrations ranging from non-detect (ND) ~ 45.3mg/L and 40.5 ~ 1,202 mg/L, respectively. When comparing the bromide concentration in the salt to the bromate concentration in the chlorine produced by salt electrolysis, the correlation of bromide to bromate concentration was 0.870 (active chlorine concentration from on-site production: 0.6-0.8%, n=40). The correlation of bromate concentration in the chlorine produced to that in the treated water was 0.866.
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국내 유통 중인 먹는샘물 원수의 이온류 수질 특성에 관한 연구

이이내 ( Leenae Lee ),안경희 ( Kyunghee Ahn ),민병대 ( Byungdae Min ),양미희 ( Mihee Yang ),최인철 ( Incheol Choi ),정현미 ( Hyenmi Chung ),박주현 ( Juhyun Park ) 한국물환경학회 2016 한국물환경학회지 Vol.32 No.5
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 ScienceON
 
 KISS
The goal of this study is to provide basic data to establish a foundation for the provision of safe drinkable water. The raw water of natural mineral water was analyzed to determine the quantities of anions (F-, Cl-, NO3-N-, and SO42-) and cations (Ca2+, K+, Mg2+, and Na+) during the former and latter half of 2016. Analysis of the current quality of the raw water of natural mineral water among domestic manufacturers showed average anions contents of 0.46㎎/L of fluorine, 8㎎/L of chlorine ion, 1.5㎎/L of nitrate nitrogen, and 12㎎/L of sulfate ion. While the fluorine content was greater than the water quality criterion of 2.0㎎/L at four points, the fluorine level was overall stable. The average cations contents included 21.3㎎/L of calcium, 1.0㎎/L of potassium, 3.4㎎/L of magnesium, and 9.6㎎/L of sodium. The chemical characteristics were compared among the major ions, and the results are presented in a piper diagram. The content ratio of cations was in the order of Ca2+>Na+>Mg2+>K+, whereas that of anions was in the order of SO42-〉Cl->NO3-N>F-. While the cations were slightly scattered, the anions were generally concentrated except for at a few points. The Ca-Na-HCO3 type was dominant overall in water sources from diorite, gneiss, and granite, while the Na-Mg-Ca-HCO3-Cl type was dominant in basalt sources. Mineral water manufacturers source their water under various conditions, including in-hole casing, excavation depth, and contact state of bedrock; even within the same rocky area, some differences in the water quality type can occur. When the depth of the water source was taken into account, the mean anions contents of F-, Cl-, NO3-N-, and SO42- were similar, with no significant differences according to depth. Of the cations, K+ and Na+ showed no significant differences across all the tubular wells, whereas Ca2+ and Mg2+ decreased in content with depth.

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