Oxidative degradation of dimethyl phthalate (DMP) by UV/H2O2 process

Xu, Bin; Gao, Naiyun; Cheng, Hefa; Xia, Shengji; Min, Rui; Zhao, Dandan

doi:10.1016/j.jhazmat.2008.05.122

Cited by 119 publications

(55 citation statements)

References 41 publications

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“…An interesting deviation from the trends observed in the three toxicity tests was the difference in oestrogenic activity between samples 4 and 5, even though both were treated photocatalytically and only The results of the oestrogenicity test point to oxidation intermediates as the culprit for high findings, whose presence has been confirmed by several other reports (20)(21)(22)(23)(24)(25).…”

Section: Yes Assaymentioning

confidence: 72%

Efficiency of advanced oxidation processes in lowering bisphenol A toxicity and oestrogenic activity in aqueous samples

Plahuta

Tišler

Toman

et al. 2014

Archives of Industrial Hygiene and Toxicology

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Bisphenol A (BPA) is a well-known endocrine disruptor with adverse oestrogen-like effects eliciting adverse effects in humans and wildlife. For this reason it is necessary to set up an efficient removal of BPA from wastewaters, before they are discharged into surface waters. The aim of this study was to compare the efficiency of BPA removal from aqueous samples with photolytic, photocatalytic, and UV/H 2 O 2 oxidation. BPA solutions were illuminated with different bulbs (halogen; 17 W UV, 254 nm; and 150 W UV, 365 nm) with or without the TiO 2 P-25 catalyst or H 2 O 2 (to accelerate degradation). Acute toxicity and oestrogenic activity of treated samples were determined using luminescent bacteria (Vibrio fischeri), water fleas (Daphnia magna), zebrafish embryos (Danio rerio), and Yeast Estrogen Screen (YES) assay with genetically modified yeast Saccharomyces cerevisiae. The results confirmed that BPA is toxic and oestrogenically active. Chemical analysis showed a reduction of BPA levels after photolytic treatment and 100 % conversion of BPA by photocatalytic and UV/H 2 O 2 oxidation. The toxicity and oestrogenic activity of BPA were largely reduced in photolytically treated samples. Photocatalytic oxidation, however, either did not reduce BPA toxic and oestrogenic effects or even increased them in comparison with the baseline, untreated BPA solution. Our findings suggest that chemical analysis is not sufficient to determine the efficiency of advanced oxidation processes in removing pollutants from water and needs to be complemented with biological tests.

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Section: Yes Assaymentioning

confidence: 72%

Efficiency of advanced oxidation processes in lowering bisphenol A toxicity and oestrogenic activity in aqueous samples

Plahuta

Tišler

Toman

et al. 2014

Archives of Industrial Hygiene and Toxicology

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“…This increases DEP removal efficiency. In acidic conditions, the formation of proton ions (H + ) increased and then reacted with the electron to form free radicals (·H; Xu et al 2009). Free radical is the major oxidizing species in photocatalysis; moreover, the degradation efficiency might be accelerated in both higher and lower pH conditions.…”

Section: Effect Of Phmentioning

confidence: 99%

Photocatalytic Degradation of Diethyl Phthalate (DEP) in Water Using TiO2

Huang¹,

Chen²

2009

Water Air Soil Pollut

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The degradation of diethyl phthalate (DEP) in aqueous solution by titanium dioxide (TiO 2 ) photocatalysis has been investigated in our research. DEP was completely removed in the solution by 50-min irradiation. Results show that DEP degradation rate was affected by initial DEP concentration, photocatalyst amount, light intensity, and pH. Photocatalytic degradation intermediates were identified by gas chromatography-mass spectrometry intermediates were identified by gas chromatography-mass spectrometry. The major intermediates are methyl benzoate, ethyl benzoate, and carboxylic derivatives. The photocatalytic degradation process was found to obey first-order reaction. Consequently, the result of photocatalytic degradation could be an efficient method of DEP removal from wastewater.

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“…Other authors [27,28] have reported that the rate constants increased approximately linearly with the initial concentrations of hydrogen peroxide up to a threshold value in all cases, but the rate constants increased very slowly with further increases in H 2 O 2 concentration up to this value.…”

Section: Effect Of Oxidant Dosage On Rate Constantsmentioning

confidence: 71%

“…A number of other researchers have previously studied the dependence of the rate constants for decoloration on the dosage of oxidant supplied [14,15,[26][27][28]. As seen in Table 1, the rate constants calculated in solving the kinetic equations system of the model vary significantly with the hydrogen peroxide dosage (D).…”

Section: Effect Of Oxidant Dosage On Rate Constantsmentioning

confidence: 99%

Lumped-intermediates analysis in the photooxidation of Rhodamine 6G in the H2O2/UV system

Menéndez

Lombraña

Luis

2011

Korean J. Chem. Eng.

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The combination of H 2 O 2 with UV radiation was applied to study the degradation of Rhodamine 6G dye (Rh-6G). The lumped kinetic model proposed in this work is a reaction-system scheme to describe the degradation of dye using lumps of intermediate compounds grouped by their chemical and colorimetric behavior. Rate constants obtained by application of the model were shown to predict the progress of dye oxidation. The effects of pH and oxidant dosage on these rate constants were also analyzed. Finally, photodecoloration was studied considering the absorption at 528 nm (the maximum absorption wavelength of the dye) as the sum of all compounds absorbing at this wavelength: Rhodamine itself and the colored intermediates produced.

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Oxidative degradation of dimethyl phthalate (DMP) by UV/H2O2 process

Cited by 119 publications

References 41 publications

Efficiency of advanced oxidation processes in lowering bisphenol A toxicity and oestrogenic activity in aqueous samples

Efficiency of advanced oxidation processes in lowering bisphenol A toxicity and oestrogenic activity in aqueous samples

Photocatalytic Degradation of Diethyl Phthalate (DEP) in Water Using TiO2

Lumped-intermediates analysis in the photooxidation of Rhodamine 6G in the H2O2/UV system

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