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Title: The effect of preozonation on the control of trihalomethane formation

Abstract

A study was made to obtain a better understanding of the manner in which preozonation affects trihalomethane (THM) formation with respect to humic acid, citric acid, and 11 aromatic compounds which were components of humic acid, all in dilute aqueous medium. Ozonation before chlorination is able to not only decrease, but also increase the concentrations of THM precursors. The compounds which are inherently high THM precursors, such as resorcinol, aniline, salicylaldehyde, phenol, and p-hydroxybenzoic acid, are controlled with respect to the increase in the amount of ozone consumed, but the compounds which have essentially no or a low potential for chloroform formation, such as hydroquinone, salicylic acid, methoxybenzene, benzaldehyde, and benzoic acid, produce their maximum THM levels at a certain value of ozone consumed. When 1 mg of organic carbon consumes more than 8 mg of ozone, THM formation from the tested aromatic compounds is depressed by ozone. Aliphatic carbonyl compounds which are the products resulting from the ozonation of aromatic compounds are not significant THM precursors. The preozonation of humic acid is not as effective in reducing its THM formation potential (THMFP) as when simple aromatic compounds are treated. However, the organic materials in the effluent from a biologicalmore » treatment process usually have a high THMFP, in comparison with organic compounds which are contained in raw wastes. Therefore, there is a limitation in the effectiveness of utilizing biological treatment to remove the precursors of THM.« less

Authors:
; ;  [1]
  1. Kyoto Univ. (Japan)
OSTI Identifier:
5646832
Resource Type:
Journal Article
Journal Name:
Ozone: Science and Engineering (The Journal of the International Ozone Association); (United States)
Additional Journal Information:
Journal Volume: 8:2; Journal ID: ISSN 0191-9512
Country of Publication:
United States
Language:
English
Subject:
32 ENERGY CONSERVATION, CONSUMPTION, AND UTILIZATION; CITRIC ACID; OZONIZATION; HUMIC ACIDS; AQUEOUS SOLUTIONS; CHLORINATION; METHANE; ORGANIC HALOGEN COMPOUNDS; OZONE; ALKANES; CARBOXYLIC ACIDS; CHEMICAL REACTIONS; DISPERSIONS; HALOGENATION; HYDROCARBONS; HYDROXY ACIDS; MIXTURES; ORGANIC ACIDS; ORGANIC COMPOUNDS; SOLUTIONS; 320603* - Energy Conservation, Consumption, & Utilization- Municipalities & Community Systems- Public Utilities- (1980-)

Citation Formats

Yamada, Harumi, Somiya, Isao, and Inanami, Fumio. The effect of preozonation on the control of trihalomethane formation. United States: N. p., Web.
Yamada, Harumi, Somiya, Isao, & Inanami, Fumio. The effect of preozonation on the control of trihalomethane formation. United States.
Yamada, Harumi, Somiya, Isao, and Inanami, Fumio. . "The effect of preozonation on the control of trihalomethane formation". United States.
@article{osti_5646832,
title = {The effect of preozonation on the control of trihalomethane formation},
author = {Yamada, Harumi and Somiya, Isao and Inanami, Fumio},
abstractNote = {A study was made to obtain a better understanding of the manner in which preozonation affects trihalomethane (THM) formation with respect to humic acid, citric acid, and 11 aromatic compounds which were components of humic acid, all in dilute aqueous medium. Ozonation before chlorination is able to not only decrease, but also increase the concentrations of THM precursors. The compounds which are inherently high THM precursors, such as resorcinol, aniline, salicylaldehyde, phenol, and p-hydroxybenzoic acid, are controlled with respect to the increase in the amount of ozone consumed, but the compounds which have essentially no or a low potential for chloroform formation, such as hydroquinone, salicylic acid, methoxybenzene, benzaldehyde, and benzoic acid, produce their maximum THM levels at a certain value of ozone consumed. When 1 mg of organic carbon consumes more than 8 mg of ozone, THM formation from the tested aromatic compounds is depressed by ozone. Aliphatic carbonyl compounds which are the products resulting from the ozonation of aromatic compounds are not significant THM precursors. The preozonation of humic acid is not as effective in reducing its THM formation potential (THMFP) as when simple aromatic compounds are treated. However, the organic materials in the effluent from a biological treatment process usually have a high THMFP, in comparison with organic compounds which are contained in raw wastes. Therefore, there is a limitation in the effectiveness of utilizing biological treatment to remove the precursors of THM.},
doi = {},
url = {https://www.osti.gov/biblio/5646832}, journal = {Ozone: Science and Engineering (The Journal of the International Ozone Association); (United States)},
issn = {0191-9512},
number = ,
volume = 8:2,
place = {United States},
year = {},
month = {}
}