A comparative study of the effects of chloride, sulfate and nitrate ions on the rates of decomposition of H2O2 and organic compounds by Fe(II)/H2O2 and Fe(III)/H2O2

Laat, J. De; Le, Giang Truong; Légube, B.

doi:10.1016/j.chemosphere.2003.11.021

Cited by 404 publications

(170 citation statements)

References 27 publications

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“…At a high concentration of chloride ions, however, the oxidation of aniline ceased. Chloride ions slow down the oxidation reactions through the complexation of Fe 2+ /Fe 3+ with Cl − (Reactions (4)- (7)) and/or by acting as scavengers of hydroxyl radicals (Reactions (8)- (10)) (Bacardit et al, 2007;De Laat et al, 2004;Kiwi et al, 2000;Machulek et al, 2007). It can be seen from Reactions (8) and (10) that the scavenging effect of chloride ions was pH-dependent, which can be abated by maintaining the pH at an optimal level of 3 during the Fenton process (De Laat et al, 2004;Grebel et al, 2010).…”

Section: Resultsmentioning

confidence: 99%

Enhancement of Fenton oxidation for removing organic matter from hypersaline solution by accelerating ferric system with hydroxylamine hydrochloride and benzoquinone

Peng

Zhang

et al. 2016

Journal of Environmental Sciences

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Section: Resultsmentioning

confidence: 99%

Enhancement of Fenton oxidation for removing organic matter from hypersaline solution by accelerating ferric system with hydroxylamine hydrochloride and benzoquinone

Peng

Zhang

et al. 2016

Journal of Environmental Sciences

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“…Inorganic anions, such as Cl − , SO 4 2− , and H 2 PO 4 − /HPO 4 2− , may effect overall reaction rates by scavenging the hydroxyl radicals to form less reactive inorganic radicals (·Cl − , ·Cl 2 − , ·HOCl − , SO· 4 2− ) that further take part in oxidation reactions [37]. Differences in the anionic content of the natural water did not appear to affect the degradation rate of the PAHs.…”

Section: Natural Watermentioning

confidence: 92%

“…At higher concentrations >100 mM of chloride a significant decreases in degradation of the color was observed. The presence of chloride and sulfate led to a decrease of the rate of depletion of atrazine and hydrogen peroxide during H 2 O 2 /Fe 3+ reaction [37]. The low concentrations of nitrate ions in the natural water and the fact that during UV/H 2 O 2 process the production of hydroxyl radicals is much more effective than from the photolysis of nitrate [38], it can be concluded that nitrate did not affect the degradation rate of the PAHs.…”

Section: Natural Watermentioning

confidence: 93%

Photolysis, oxidation and subsequent toxicity of a mixture of polycyclic aromatic hydrocarbons in natural waters

Shemer

Linden

2007

Journal of Photochemistry and Photobiology A: Chemistry

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Photodegradation of a mixture of three polycyclic aromatic hydrocarbons fluorene (FLU), dibenzofuran (DBF), and dibenzothiophene (DBT) using UV and UV/H 2 O 2 processes was studied. Treating a mixture of the PAHs stimulated a more realistic contamination composition present in polluted water. Effects of pH, PAH concentration, and water matrix composition on removal rates and efficiencies of these compounds are discussed. Batch experiments were conducted using both monochromatic low pressure (LP, 253.7 nm) and polychromatic medium pressure (MP, 200-400 nm) UV sources, in a quasi-collimated beam setup. A synergistic effect was observed during direct photolysis and LP-UV/H 2 O 2 of the mixture as compared to photodegradation as a single component in an aqueous solution. Similar results were obtained for FLU using MP-UV/H 2 O 2 whereas, degradation of DBF and DBT was inhibited in a mixture. Natural water enhanced the direct photolysis compared to laboratory buffered water, whereas, degradation of the PAHs in the natural water was inhibited using UV/H 2 O 2 process. Toxicity testing using a luminescent inhibition bioassay was correlated to intermediates generated during UV-based oxidation reactions.

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“…It is also known that the Fenton system can be broadened to other lower valence transition metals which have one-electron redox couples [e.g., Co(I)/Co(II), Cu(I)/Cu(II), Mn(II)/Mn(III), Ti(III)/Ti(IV)] and organic hydroperoxides (e.g., alkyl hydroperoxides, ROOH) or hypohalous acids (e.g., HOCl). More information about Fenton and Fenton-like systems can be found in Haber and Weiss (1934), Barb et al (1951a,b), Walling (1975), Edwards and Curci (1992), Sychev and Isaak (1995), Goldstein andMeyerstein (1999) andDe Laat (2004) and references cited therein.…”

Section: Acid Hydrogen Peroxidementioning

confidence: 99%

Energy efficient refining of black spruce TMP by using acid hydrogen peroxide: Part 1. A pilot plant study

Walter

Paulsson

Wackerberg

2009

Nordic Pulp &Amp; Paper Research Journal

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SUMMARY:The potential of using acid hydrogen peroxide for lowering the electrical energy consumption during production of Black spruce (Picea mariana) thermomechanical pulp (TMP) was investigated. The chemical system, which consisted of ferrous sulphate, hydrogen peroxide and optionally an enhancer [ethylenediaminetetraacetic acid (sodium salt), 3,4-dimethoxybenzyl (veratryl) alcohol or oxalic acid/sodium oxalate], was evaluated as an inter-stage treatment where the primary refiner was used as a mixer. The approach has the advantage of minimising the capital investment needed for implementation, thus being directly applicable in a thermomechanical pulping process consisting of two or more refiners in series.The results obtained in a pilot plant trial revealed that is was possible to significantly reduce the specific energy consumption by approximately 20 and 35% to a freeness value of 100 ml CSF by using 1 and 2% hydrogen peroxide, respectively. The energy reduction could be obtained without any substantial change in fibre length, fractional composition of the pulp or tensile strength of the paper. The tear strength was slightly reduced however, as was the pulp yield. The major drawback with the acid hydrogen peroxide system was a reduction in brightness by at least 6 brightness units. The addition level of ferrous sulphate was too high and the possibility to reducing the discoloration should be considerable when the chemical system is optimized.

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A comparative study of the effects of chloride, sulfate and nitrate ions on the rates of decomposition of H2O2 and organic compounds by Fe(II)/H2O2 and Fe(III)/H2O2

Cited by 404 publications

References 27 publications

Enhancement of Fenton oxidation for removing organic matter from hypersaline solution by accelerating ferric system with hydroxylamine hydrochloride and benzoquinone

Enhancement of Fenton oxidation for removing organic matter from hypersaline solution by accelerating ferric system with hydroxylamine hydrochloride and benzoquinone

Photolysis, oxidation and subsequent toxicity of a mixture of polycyclic aromatic hydrocarbons in natural waters

Energy efficient refining of black spruce TMP by using acid hydrogen peroxide: Part 1. A pilot plant study

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