Boron-doped diamond electrooxidation of ethyl paraben: The effect of electrolyte on by-products distribution and mechanisms

Frontistis, Zacharias; Αντωνοπούλου, Μαρία; Yazirdagi, Melis; Kilinc, Zeynep; Konstantinou, Ioannis; Katsaounis, Alexandros; Mantzavinos, Dionissios

doi:10.1016/j.jenvman.2016.06.044

Cited by 63 publications

(42 citation statements)

References 36 publications

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“…The molecular formula C 7 H 5 O 4 – was assigned to isomeric structures 3,4–dihydroxybenzoic acid (3,4–DHB) and 2,4–dihydroxybenzoic acid (2,4–DHB) both have m/z 153.0. Similar observations have been reported on the formation of dihydroxybenzoic acids with the attack by

H O^{•}

and

S O_{4}^{- •}

radicals ,. It has been reported that the TBPs are less toxic than the parent compound .…”

Section: Resultssupporting

confidence: 87%

“…This implying that pH was lower than the pKa (8.22), while at high pH( pH=9), there was a significant increase in the degradation of EP i. e. pH > pKa . From Figure , there was minimal degradation of EP at pH 9 and low dosage due to factors that might affect the process.…”

Section: Resultsmentioning

confidence: 91%

“…The 50 mg dosage at pH 9 showed low degradation due to the minimal light passing through to activate the surface of the catalyst to produce hydroxyl radicals. Frontistis et al . noted that pH 3–9 have little effect on degradation of EP.…”

Section: Resultsmentioning

confidence: 99%

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Application of Z–Scheme CdSWO₃ Nanocomposite for Photodegradation of Ethylparaben under Irradiation with Visible Light: A Combined Experimental and Theoretical Study

et al. 2018

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The CdS- WO3 nanocomposite was successfully synthesized using the hydrothermal method. The catalytic capacity of CdS- WO3 nanocomposite was evaluated based on various parameters, such as pH, catalyst load, bicarbonate and persulfate concentrations. The ratios of CdS to WO3 was also examined to acquire the photocatalytic performance in addition, the by–products and pathway were also studied. The findings showed that CdS- WO3 (ratio 3:7) produced better photodegradation performance in comparison to CdS- WO3 (ratio 1:1). Also, from the same investigation, the CdS- WO3 nanocomposite exhibited a slightly higher catalytic ability in the presence of 150 mg L–1 S2O82– ions (at pH 3) than with bicarbonate ions. A 40% degradation was observed in the presence of 150 mg L–1 S2O82– ions (at pH 3). Moreover, about 38% of adsorption was observed with bicarbonate ions. In this study, we systematically reveal the underlying mechanism of the improved photoactivity of CdS–WO3 nanocomposite using a hybrid density functional theory calculation. The interfacial interaction led to the formation of a built–in internal electric field at the CdS–WO3 interface to promote the separation of charge carriers, The theoretical results rationalise the experimental findings and offer a new understanding of the underlying mechanism of the photoactivity of CdS–WO3 nanocomposite. The degradation pathway of Ethylparaben, which involved dealkylation of ethyl unit was proposed.

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H O^{•}

and

S O_{4}^{- •}

radicals ,. It has been reported that the TBPs are less toxic than the parent compound .…”

Section: Resultssupporting

confidence: 87%

Section: Resultsmentioning

confidence: 91%

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Application of Z–Scheme CdSWO₃ Nanocomposite for Photodegradation of Ethylparaben under Irradiation with Visible Light: A Combined Experimental and Theoretical Study

et al. 2018

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“…When real water is used, the inorganic salts present in the matrix, especially carbonates, could decrease the removal efficiency [32]. On the other hand, some inorganic compounds such as sulfate and chlorine can improve the reverse effect, increasing the efficiency of emerging contaminants removal [33].…”

Section: Effect Of Noble Metal Loading On the Parabens Degradationmentioning

confidence: 99%

Effect of Noble Metals (Ag, Pd, Pt) Loading over the Efficiency of TiO2 during Photocatalytic Ozonation on the Toxicity of Parabens

et al. 2018

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Abstract:The conventional wastewater treatments are inadequate for emerging contaminants detoxification. Photocatalytic ozonation with suitable catalyst can be considered as a suitable solution on the removal of these compounds. The aim of this study was to verify the effect of Ag, Pd and Pt with different loadings (0.1, 0.5 and 1% wt %) onto TiO 2 surface for the degradation of a mixture of parabens (methyl, ethyl, propyl, butyl and benzyl) through photocatalytic ozonation. Chemical oxygen demand (COD) and total organic carbon (TOC) was also analyzed after treatments, as well as the effect of the treatment on the samples toxicity over different species, including bacteria, clams and plants. The effect of metal loading on the parabens degradation; COD and TOC removal is very dependent upon the type of noble metal used. This can be related with the different pathways influenced by the metal load. On the one hand, it can be related with the reduction of electron-hole recombination phenomenon, and, on the other hand, the trapping of electrons by the metals reduces the amount of ozonide and hydroxyl radicals produced. In terms of toxicity, apparently the best results were achieved with the intermediate noble metal load. However, the effect of noble metal load must be analyzed case to case.

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“…No caso dos parabenos, os PEOA exibem bons resultados, tanto com a eletrólise individual [68][69][70][71] , quanto acoplada à outras tecnologias como ao Fenton 66,72 , a fotoquímica 73 e a sonoquímica 74 . A completa remoção dos parabenos e altas porcentagens de mineralização são alcançadas, embora a eficiência e o consumo energético dependam fortemente do material eletródico aplicado e da complexidade da matriz estudada.…”

Section: Acoplamento De Peoa a Outros Processos Para O Tratamento Deunclassified

Efeito interferente de compostos orgânicos no tratamento de efluentes sintéticos, contendo metil parabeno por processos eletroquímicos

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Boron-doped diamond electrooxidation of ethyl paraben: The effect of electrolyte on by-products distribution and mechanisms

Cited by 63 publications

References 36 publications

Application of Z–Scheme CdSWO₃ Nanocomposite for Photodegradation of Ethylparaben under Irradiation with Visible Light: A Combined Experimental and Theoretical Study

Application of Z–Scheme CdSWO₃ Nanocomposite for Photodegradation of Ethylparaben under Irradiation with Visible Light: A Combined Experimental and Theoretical Study

Effect of Noble Metals (Ag, Pd, Pt) Loading over the Efficiency of TiO2 during Photocatalytic Ozonation on the Toxicity of Parabens

Efeito interferente de compostos orgânicos no tratamento de efluentes sintéticos, contendo metil parabeno por processos eletroquímicos

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Boron-doped diamond electrooxidation of ethyl paraben: The effect of electrolyte on by-products distribution and mechanisms

Cited by 63 publications

References 36 publications

Application of Z–Scheme CdSWO3 Nanocomposite for Photodegradation of Ethylparaben under Irradiation with Visible Light: A Combined Experimental and Theoretical Study

Application of Z–Scheme CdSWO3 Nanocomposite for Photodegradation of Ethylparaben under Irradiation with Visible Light: A Combined Experimental and Theoretical Study

Effect of Noble Metals (Ag, Pd, Pt) Loading over the Efficiency of TiO2 during Photocatalytic Ozonation on the Toxicity of Parabens

Efeito interferente de compostos orgânicos no tratamento de efluentes sintéticos, contendo metil parabeno por processos eletroquímicos

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Product

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Application of Z–Scheme CdSWO₃ Nanocomposite for Photodegradation of Ethylparaben under Irradiation with Visible Light: A Combined Experimental and Theoretical Study

Application of Z–Scheme CdSWO₃ Nanocomposite for Photodegradation of Ethylparaben under Irradiation with Visible Light: A Combined Experimental and Theoretical Study