Journal of Life Science (생명과학회지)

Korean Society of Life Science (한국생명과학회)
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Bromate Formation by Ozonation Process and It′s Effect on Renal Toxicity in rat

오존처리에 의한 Bromate의 생성 및 흰쥐의 신장독성에 미치는 영향

  • 정운용 (경성대학교 환경문제연구소) ;
  • 이무강 (경성대학교 환경문제연구소) ;
  • 최종원 (경성대학교 환경문제연구소)
  • Published : 2002.08.01
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Abstract

In oder to investigate the effects of pH and temperature on the formation of bromate ion, which is ozonation by-products of bromine containing natural water. At the same intial pH condition, the increase of pH shown similar trends even if the reaction variables such as temperature and reaction time of ozonation were changed. As pH and temperature were increasing, the bromate concentration was increased but bromine components (HOBr/OBr-) were decreased with increasing pH from 3 to 10. Lipid peroxide content in the kidney was increased by bromate which was ingestion with 0.4g/L for 24 weeks in drinking water. Renal cytosolic enzyme system (XO, AO) of bromate group were significantly increased in comparison with those of normal group. But microsomal enzyme system were not affected. BUN level and urinary ${\gamma}$-glutamyltransferase activity were significantly increased in comparison with those of the normal. But, urinary lactate dehydrogenase activity was not affected. Renal glutathione content of rat was significantly decreased in comparison with those of normal rat given bromate. Renal glutathione S-transferase and ${\gamma}$-glutamylcysteine synthetase activities were significantly decreased in bromate-treated group, but change in renal glutathione reductase activity was not significantly different from any other experimental group.

브롬(Br-)이온을 포함하는 지표수 또는 해수를 상수원 또는 어류양식용 물로 사용할 경우 소독, 살균을 위하여 오존(O$_3$)을 많이 사용한다. 이때 물속에 포함되어 있는 브름(Br-) 이온과 오존과의 반응에 의하여 독성물질인 Bromate(BrO$_3$-)가 산화 부산물로서 생성된다. 이 bromate의 생성반응에 대한 용액의 pH와 반응온도의 영향 및 bromate를 음용수중에 함유시키고 실험동물에 섭취시켰을 때의 생체독성에 미치는 기전을 관찰하였다. Bromate의 생성은 반응온도가 증가할수록 증가되지만, 낮은온도(15$^{\circ}C$)에서는 용액의 초기 pH가 3 인 경우는 초기 pH가 7, 10 인 용액의 경우보다 훨씬 적은 생성량을 나타내었다. Bromate를 음료수중에 0, 0.1, 0.2, 0.4g/L로하여 4, 12, 16, 20, 24주 투여하고서 신조직중의 지질과산화의 함량이 증가되었으며, 혈중 뇨소질소의 활성 및 뇨중 ${\gamma}$-glutamy-ltransferase의 활성은 대조군에 비하여 bromate의 투여로 현저히 증가되었으며, 뇨중 lactate dehydrogenase의 활성에는 별다른 영향이 없었다. Bromate의 투여로 xanthine oxidase 및 aldehyde oxidase의 활성은 bromate의 투여로 현저히 증가되었으며 glutathione의 농도 및 glutathione S-transferase의 활성도 대조군 보다 현저히 억제되었다. Glutathione의 생성계에 미치는 ${\gamma}$-giutarnylcystein synthetase의 활성은 대조군에 비해 bromate의 투여로 억제되었으며 glutathione redurtase의 활성은 별다른 영향이 없었다.

Keywords

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