Transformation of trace organic compounds in drinking water by enzymic oxidative coupling

Maloney, Stephen W.; Manem, J.; Mallevialle, J.; Fiessinge, Francois.

doi:10.1021/es00145a004

Cited by 104 publications

(38 citation statements)

References 10 publications

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“…3). As in other studies, (Klibanov et al, 1983, Maloney et al, 1986, Nicell et al, 1993, and Wu et al, 1993 2,4-DCP transformation was extremely fast; a maximum removal could be achieved within less than 15 min. According to Nicell et al, 1993, if peroxidase is used in excess, the number of catalytic turnovers is limited by the availability of substrate; whereas, excessive amount of H 2 O 2 may cause partial inactivation of the enzyme.…”

Section: Resultssupporting

confidence: 82%

Peroxidase Catalyzed Decontamination of Water Polluted with 2,4-Dichlorophenols in Presence of Algae and Plant Materials

عبدالله¹

1999

mar

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ABSTRACT. Plants and algae were found useful in the decontamination of water polluted with chlorinated phenolic compounds. An artificial wastewater contaminated with up to 350 ppm herbicide 2,4-dichlorophenol (2,4-DCP), was successfully treated using horseradish, potato and Ulva sp. (sea lettuce), amended with H 2 O 2 . Horseradish -mediated provided up to 99% removal of 2,4-DCP from model solution, while, purified horseradish peroxidase provided up to 95%. Due to the apparent ease of application, the use of plant material may present a breakthrough in the enzyme treatment of contaminated water.

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Section: Resultssupporting

confidence: 82%

Peroxidase Catalyzed Decontamination of Water Polluted with 2,4-Dichlorophenols in Presence of Algae and Plant Materials

عبدالله¹

1999

mar

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“…There is additional interest because peroxidases are extensively used in environmental biotechnology to remove toxic organics from industrial waste (13)(14)(15)(16) and it would be useful to understand the protective role played by the reductant substrates in the presence of powerful inactivators.…”

Section: Biochemistry and Molecular Biology Internationalmentioning

confidence: 99%

“…In addition, peroxidase is widely used in a variety of applications ranging from enzyme markers in histochemical and immunochemical techniques (32,33) to the breakdown of toxic organics from industrial waste effluents and soils (13)(14)(15)(16)34). In this last case, powerful inactivators of peroxidases can appear, which behave in a similar way to m-CPBA.…”

Section: Biochemistry and Molecular Biology Internationalmentioning

confidence: 99%

Role of the reductant substrates on the inactivation of horseradish peroxidase by m‐Chloroperoxybenzoic acid

1996

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SUMMARYHorseradish peroxidase reacts with H202 and other hydroperoxides to form Compound I, the first active enzymatic form. m-Chloroperoxybenzoic acid, a xenobiotic hydroperoxide, acts as an oxidant substrate of horseradish peroxidase. However, this hydroperoxide is also a powerful inactivator of the enzyme and in this sense is more effective than H202. The coupled reductant substrates used in the peroxidatic reaction protect the enzyme from the inactivating process.A reaction mechanism is proposed with two competitive routes: one catalytic and one inactivating. Using a kinetic approach, the ratio between the hydroperoxide and the reductant substrate appears to be a decisive factor in the catalytic turnover of the enzyme.The role of the reductant substrates in protecting the enzyme, and the physiological and biotechnological implications of this process are discussed.

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“…18,19) Our previous papers [4][5][6][7][8] have also demonstrated that these PCPPs are formed in the reactions of phenolic compounds with chlorine in aqueous solutions. In addition, several researchers have demonstrated that chlorination or ozonation of surface and ground water containing bromide ion produces high concentrations of brominated trihalomethanes (THMs), 12,13) according to the following reactions:…”

Section: Fractionation Of Diethyl Ether Extracts By Tlcmentioning

confidence: 99%

Characterization of Polyhalogenated 4-Methylphenol Dimers (Br/Cl-Predioxins) Formed during Aqueous Chlorination of 4-Methylphenol Solution in the Presence of Bromide Ion

Onodera

Takahashi

Takemoto

et al. 2008

JOURNAL OF HEALTH SCIENCE

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Aqueous 4-methylphenol solution with bromide ion was treated with hypochlorite at 20• C under various experimental conditions. Changes in the composition of the halogenated products in water were determined by gas chromatographic (GC) and GC-mass spectrometric (GC/MS) analyses of diethyl ether extracts. 4-Methylphenol was shown to produce a variety of halogenated compounds, including polybrominated/chlorinated phenoxyphenols (Br/Cl-predioxins), having one to four halogen atoms, as by-products in the chlorine-treated water. Production of these predioxins is dependent on the number of equivalent of chlorine atoms per mole of compound and on the reaction pH. These results suggest that the chlorine treatment of water contaminated with 4-methylphenol and bromide ion leads to the formation of Br/Cl-predioxins, which are precursor of the highly toxic halogenated dibenzo-pdioxins.

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Transformation of trace organic compounds in drinking water by enzymic oxidative coupling

Cited by 104 publications

References 10 publications

Peroxidase Catalyzed Decontamination of Water Polluted with 2,4-Dichlorophenols in Presence of Algae and Plant Materials

Peroxidase Catalyzed Decontamination of Water Polluted with 2,4-Dichlorophenols in Presence of Algae and Plant Materials

Role of the reductant substrates on the inactivation of horseradish peroxidase by m‐Chloroperoxybenzoic acid

Characterization of Polyhalogenated 4-Methylphenol Dimers (Br/Cl-Predioxins) Formed during Aqueous Chlorination of 4-Methylphenol Solution in the Presence of Bromide Ion

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