The objective of this study was to investigate the effects of pH and temperature on the formation of bromate, which is ozonation by-products, during ozonation.
In this experiment, the operating parameters including pH 3～10 and temperature 15～30℃ were studied. Through the study for the bromate formation, reaction rate constant, and ozonation effect index on pH and temperature, the results obtained are as follows. At the same initial pH condition, the increase of pH shown similar trends even if the reaction variables such as temperature and reaction time of ozonation were exchanged. As pH and temperature were increasing, the bromate concentration was increased but bromine(HOBr+OBr-) was decreased with increasing pH from 3 to 10. The activation energy(J/mol) for bromate formation decreased with increasing pH. The rate constants of bromate formation for the reaction of ozone and bromide, and ozone dosage coefficient(Ko) increased with temperature and pH. Ozonation effect index(OI) decreased with increasing temperature and pH.

• 최종원(경성대학교 약학과) | Jong-Won Choi
• 김영철(경성대학교 환경공학과) | Young-Chur Kim
• 이무강(경성대학교 환경공학과) | Mu-Kang Lee Corresponding Author