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The Effect of Physical Chemistry Factors on Formation of Disinfection by-products

소독부산물 생성에 미치는 물리화학적인 인자 영향

  • Chung Yong (Department of preventive medicine, Yonsei University) ;
  • Kim Jun-Sung (Department of Civil and Environmental Engineering, University of Massachusetts in Amherst)
  • 정용 (연세대학교 의과대학 예방의학교실) ;
  • 김준성 (메사추세츠 주립대학 환경공학과)
  • Published : 2005.10.01

Abstract

This research studied the effect of factors that are able to form disinfection by-products (DBPs) of chlorination, including natural organic matter (NOM) with sewage, bromide ions, pH and contact time. Trihalomethane (THMs) yield of $0.95{\mu}mol/mg$ was higher than other DBPs yield for the chlorinated humic acid samples. THMs yield of sewage sample was $0.14{\mu}mol/mg$ and haloacetonitriles (HANs) yield in the sewage samples were $0.13{\mu}mol/mg$ but only $0.02{\mu}mol/mg$ for the humic acid samples. As the concentration of bromide ions increased, brominated DBPs increased while chlorinated DBPs decreased, because bromide ions produce brominated DBPs. THMs were highest $(55.55{\mu}g/L)$ at a pH of 7.9 and haloacetic acids (HAAs) were highest $(34.98{\mu}g/L)$ at a pH of 5. Also THMs increased with increasing pH while HAAs decreased with increasing pH. After chlorination, the rate of THMs and HAA formation are faster at initial contact time and then reaches a nearly constant value after 24 hours. This study considers ways to reduce DBP formation by chlorination.

Keywords

References

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