Influence of some groundwater and surface waters constituents on the degradation of 4-chlorophenol by the Fenton reaction

Lipczyńska-Kochany, Ewa; Sprah, Gregor; Harms, Susan M.

doi:10.1016/0045-6535(94)00371-z

Cited by 195 publications

(72 citation statements)

References 27 publications

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“…However, the reaction rate constant of phosphate with UOH was reported to be less than 2 × 10 4 (mol/L) −1 sec −1 (Lipczynskakochany et al, 1995;Watts and Dilly, 1996), much lower than the rate constants for the reaction of UOH with organic molecules, which usually are in the range of 10 9 and 10 10 (mol/L)…”

Section: Effect Of Phosphate On Catechol Removal and H 2 O 2 Decomposmentioning

confidence: 99%

Effect of phosphate on heterogeneous Fenton oxidation of catechol by nano-Fe 3 O 4 : Inhibitor or stabilizer?

Yang

Sun

et al. 2016

Journal of Environmental Sciences

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The effect of phosphate on adsorption and oxidation of catechol, 1,2-dihydroxybenzene, in a heterogeneous Fenton system was investigated. In situ attenuated total reflectance infrared spectroscopy (ATR-FTIR) was used to monitor the surface speciation at the nano-Fe 3 O 4 catalyst surface. The presence of phosphate decreased the removal rate of catechol and the abatement of dissolved organic compounds, as well as the decomposition of H 2 O 2 . This effect of phosphate was mainly due to its strong reaction with surface sites on the iron oxide catalyst. At neutral and acid pH, phosphate could displace the adsorbed catechol from the surface of catalyst and also could compete for surface sites with H 2 O 2 . In situ IR spectra indicated the formation of iron phosphate precipitation at the catalyst surface. The iron phosphate surface species may affect the amount of iron atoms taking part in the catalytic decomposition of H 2 O 2 and formation of hydroxyl radicals, and inhibit the catalytic ability of Fe 3 O 4 catalyst. Therefore, phosphate ions worked as stabilizer and inhibitor in a heterogeneous Fenton reaction at the same time, in effect leading to an increase in oxidation efficiency in this study. However, before use of phosphate as pH buffer or H 2 O 2 stabilizer in a heterogeneous Fenton system, the possible inhibitory effect of phosphate on the actual removal of organic pollutants should be fully considered.

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Section: Effect Of Phosphate On Catechol Removal and H 2 O 2 Decomposmentioning

confidence: 99%

Effect of phosphate on heterogeneous Fenton oxidation of catechol by nano-Fe 3 O 4 : Inhibitor or stabilizer?

Yang

Sun

et al. 2016

Journal of Environmental Sciences

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“…If the reaction proceeds in acidic media, the hydroxyl radicals formed can destroy even unsaturated alkenes, aromatic or heterocyclic rings [2].…”

Section: Introductionmentioning

confidence: 99%

Decomposition of methomyl over supported iron catalysts

Tomašević

Bošković

Mijin

et al. 2007

React Kinet Catal Lett

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“…Second, the UV degradation of organic compounds is the free radical reaction, which is influenced by the various anions in aqueous solutions. For example, the degradation rate of 4-chlorophenol (Lipczynska-Kochany et al, 1995) in aqueous solutions was found to decrease with the following sequence: ClO…”

Section: Degradation Kinetics At Different Phmentioning

confidence: 99%

Ultraviolet degradation of methyltins: Elucidating the mechanism by identification of a detected new intermediary product and investigating the kinetics at various environmental conditions

Zhai

Liu

et al. 2008

Chemosphere

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The photodegradation of methyltins, as environmental pollutants, has scarcely been studied so far because of the shortage of rapid and sensitive speciation methods, even though they have very simple structures. The photodegradation of monomethyltin trichloride (MMT), dimethyltin dichloride (DMT) and trimethyltin chloride (TMT) was studied with our new developed HPLC-FPD hyphenated system, which enables rapid and sensitive detection of methyltins. The half-life times and kinetic rate constants of their degradation at different pH were calculated. The results suggest that MMT, DMT and TMT can be degraded under the UV irradiation rapidly at different pH, with a degradation rate sequence of TMT < DMT < MMT. An unknown intermediary product, which is more stable and has higher concentration at pH 8 for MMT and DMT, of methyltin photodegradation was detected for the first time. This unknown intermediary product was identified as methyloltin with electrospray mass spectrometry, and the possible mechanism was proposed based on the intermediary product. The effects of some environmental parameters such as salinity and humic acid on the degradation rate of methyltins were also investigated. Results suggest that salinity and humic acid have strong effect on their degradation, especially for TMT, which was almost never degraded in the solutions containing NaCl and humic acid.

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Influence of some groundwater and surface waters constituents on the degradation of 4-chlorophenol by the Fenton reaction

Cited by 195 publications

References 27 publications

Effect of phosphate on heterogeneous Fenton oxidation of catechol by nano-Fe 3 O 4 : Inhibitor or stabilizer?

Effect of phosphate on heterogeneous Fenton oxidation of catechol by nano-Fe 3 O 4 : Inhibitor or stabilizer?

Decomposition of methomyl over supported iron catalysts

Ultraviolet degradation of methyltins: Elucidating the mechanism by identification of a detected new intermediary product and investigating the kinetics at various environmental conditions

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