Ozonization of Humic Acids. Medium Term Toxicity Towards Daphnia Magna

Imbenotte, M.; Pommery, Jean; Pommery, Nicole; Erb, F.

doi:10.1080/01919518608552302

Cited by 2 publications

(2 citation statements)

References 5 publications

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“…There was some indication that aeration of the UV-treated water for 24 h prior to adding the daphnids would remove the toxicity. The formation of products toxic to Daphnia magna has also been observed for ozonation of humic acids (26). A promising approach for the control water is to use well water that is naturally low in DOM, or perhaps reconstituted water.…”

mentioning

confidence: 98%

Sorption of Chlorinated Hydrocarbons in the Water Column by Dissolved and Particulate Organic Material

Henry¹,

Suffet²,

Friant³

1988

Advances in Chemistry

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Partition coefficients for dissolved and particulate organic material (K dom and Κ pom , respectively) and five organic chemicals were meas ured in surface waters and leachates from soils and sediments. Kdom was measured by using changes in Daphnia magna dry-weight bioconcentration factors, and Kpom was measured by centrifugation. The results showed that sorption by dissolved organic matter can dominate the distribution of organic chemicals in the water column and affects calculation of Kpom. The linear relationship of log Kdom and log Kpom values to log Kow (octanol-water partition coefficient) was similar to the relationship found by Kenaga and Goring for soils and sediments. This resemblance indicates that organic materials in the water column, soils, and sedimentary material sorb chemicals by a similar mechanism. SORPTION OF HYDROPHOBIC ORGANIC CHEMICALS by naturally occurring organic matter in soils and aquatic systems is an important factor in determining their distribution in the environment. Incorporation of sorption by the organic matter in soils and sedimentary material into fate and transport1Current address: BCM Engineers

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mentioning

confidence: 98%

Sorption of Chlorinated Hydrocarbons in the Water Column by Dissolved and Particulate Organic Material

Henry¹,

Suffet²,

Friant³

1988

Advances in Chemistry

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“…In addition, the ozonized solutions now contain higher concentrations of phenolic constituents than are present before ozonation. These phenolic compounds might be liberated by decomposition of iron and manganese complexes (68).…”

Section: Reactions Of Oxidants/disinfectants With Humic and Other Natmentioning

confidence: 99%

Occurrence of by-products of strong oxidants reacting with drinking water contaminants--scope of the problem.

Rice¹,

Gomez-Taylor²

1986

Environ Health Perspect

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This paper describes results of a detailed literature review of the organic and inorganic by-products that have been identified as being formed in aqueous solution with four of the strong oxidizing/disinfecting agents commonly employed in drinking water treatment. These agents are: chlorine, chlorine dioxide, chloramine, and ozone. Significant findings include the production of similar nonchlorinated organic oxidation products from chlorine, chlorine dioxide, and ozone. In addition, all three chlorinous oxidants/disinfectants can produce chlorinated by-products under certain conditions. The presence of chloronitrile compounds in drinking waters is indicated to arise from reactions of chlorine or chloramine to amine/amide functions in amino acids or proteinaceous materials, followed by dehydrohalogenation. These nitriles could hydrolyze to produce the corresponding chloroacetic acids. It is concluded that to minimize the presence of oxidation by-products in drinking waters, the concentrations of oxidizable organic/inorganic impurities should be lowered before any oxidizing agent is added.

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Ozonization of Humic Acids. Medium Term Toxicity Towards Daphnia Magna

Cited by 2 publications

References 5 publications

Sorption of Chlorinated Hydrocarbons in the Water Column by Dissolved and Particulate Organic Material

Sorption of Chlorinated Hydrocarbons in the Water Column by Dissolved and Particulate Organic Material

Occurrence of by-products of strong oxidants reacting with drinking water contaminants--scope of the problem.

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