Degradation of ethyl paraben in aqueous medium using advanced oxidation processes: Efficiency evaluation of UV-C supported oxidants

Dhaka, Sarita; Kumar, Rahul; Lee, Sang hun; Kurade, Mayur B.

doi:10.1016/j.jclepro.2018.01.197

Cited by 93 publications

(31 citation statements)

References 48 publications

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“…The current study shows that the removal of antibiotics from waters can be achieved at neutral pH condition. Besides, previous research indicated that the VUV/S 2 O 2− system was a more proficient and economical ($6.26 /m 3 water) process for the removal of organics than other AOP (e.g., heat-activated S 2 O 8 2− , Fenton, photo-Fenton, UV/H 2 O 2 , and UV/PMS) methods (Dhaka et al, 2018). Based on the overall results, VUV/K 2 S 2 O 8 process appears to be a promising method for the degradation of CEX, OFX, and NOF in saline antibiotics-containing wastewaters.…”

Section: Implications For Industrial Applicationsmentioning

confidence: 99%

“…Advanced oxidation processes (AOPs) can degrade a variety of organic contaminants into less complex byproducts and finally mineralize them into carbon dioxide and water in both surface water and wastewater (Dhaka et al, 2018). Various UV-based processes can be significantly enhanced by the combination of technologies (MacDonald et al, 2018).…”

Section: Introductionmentioning

confidence: 99%

“…Meanwhile, the effect of inorganic anions commonly present in wastewaters showed various trends. Chloride (Cl − ) and carbonate (CO 3 2− ) suppressed reaction rates of UV/S 2 O 8 2− and UV/H 2 O 2 systems, whereas they elevated the degradation rates of UV/peroxymonosulfate (PMS) treatment (Dhaka et al, 2018).…”

Section: Introductionmentioning

confidence: 99%

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Degradation of antibiotics by modified vacuum-UV based processes: Mechanistic consequences of H2O2 and K2S2O8 in the presence of halide ions

Sun

Cho

Graham

et al. 2019

Science of The Total Environment

105

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In this work, the degradation of cefalexin, norfloxacin, and ofloxacin was examined via various advanced oxidation processes (AOPs). Direct photolysis by ultraviolet (UV) and vacuum ultra violet (VUV) was less effective for the degradation of fluoroquinolone antibiotics such as norfloxacin and ofloxacin than that of cefalexin. Both hydrogen peroxide (H 2 O 2) and potassium persulfate (K 2 S 2 O 8) assisted UV/VUV process remarkably enhanced fluoroquinolone degradation. The addition of K 2 S 2 O 8 was superior to H 2 O 2 under VUV irradiation, with the best removal efficiency of norfloxacin and ofloxacin being almost 100% within 3 min in the presence of VUV/K 2 S 2 O 8. The ofloxacin degradation rate was accelerated as concentrations of H 2 O 2 and K 2 S 2 O 8 was increased to 3 mM, but the degradation rate was slightly decreased with excess H 2 O 2 (> 3 mM). The performance of modified VUV processes (i.e., VUV/H 2 O 2 and VUV/K 2 S 2 O 8) was inhibited at highly alkaline condition (pH 11). The coexistence of halides (Cl − and Br −) enhanced antibiotics degradation via the modified VUV processes, but the reaction was almost unaffected in the presence of single halides. This study demonstrated that modified VUV processes (especially VUV/K 2 S 2 O 8) are efficient for eliminating fluoroquinolone antibiotics from water, which can be considered as a clean and green method for the treatment of antibiotics-containing industrial wastewater.

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Section: Implications For Industrial Applicationsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Degradation of antibiotics by modified vacuum-UV based processes: Mechanistic consequences of H2O2 and K2S2O8 in the presence of halide ions

Sun

Cho

Graham

et al. 2019

Science of The Total Environment

105

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“…22 In general, both the positive and negative impact of bicarbonate and carbonate on the performances of advanced oxidation processes have been reported in the literature. 36,37 The negative effect was mainly ascribed to the scavenging action of the anions to the main oxidizing species, whereas the role of carbonate radicals was emphasized to explain the positive influence of carbonate/ /bicarbonate. The effect of carbonate and bicarbonate anions on the removal efficiency of RB 19 dye was studied at different concentrations (0, 10, 20, 50, 100 and 200 mmol•L -1 ).…”

Section: Influence Of Inorganic Anionsmentioning

confidence: 99%

Sulfate radicals-based degradation of antraquinone textile dye in a plug flow photoreactor

et al. 2019

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The study evaluated the degradation of the antraquinone textile dye reactive blue 19, a frequently used dye in the textile industry, by means of sulfate radicals. Sulfate radicals were generated by activation of peroxydisulfate with UV-C (254 nm) irradiation. UV irradiation alone did not affect the removal efficiency, while with the addition of an oxidant, the removal efficiency was significantly improved. The degradation rates of the textile dye increased at higher initial dosages of oxidant, while the opposite trend was observed in the case of increasing initial dye concentration. Acidic conditions were more convenient for degradation of the dye then neutral or basic. Degradation of the textile dye was not affected by the presence of bicarbonate and chloride anions within the concentrations range from 1 to 200 mmol•L-1. The presence of carbonate showed a suppressing effect on the removal efficiency, especially at carbonate levels below 20 mmol•L-1. However, at carbonate levels greater than 20 mmol•L-1 , the dye removal efficiency increased. The use of methanol and tert-butanol as scavengers revealed that both radicals, HO • and SO 4 •-, would be generated depending on initial pH value of the dye solution.

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“…Advanced oxidation processes (AOPs) are effective and environmentally friendly methods that can degrade organic pollutants that are resistant to the conventional treatment methods into simple byproducts and finally mineralize them into carbon dioxide and water [3]. The reactive and nonspecific oxidant, hydroxyl radicals, with high electrochemical oxidation potential were produced by AOPs [4].…”

Section: Introductionmentioning

confidence: 99%

Application of Sono–photo-Fenton process for degradation of phenol derivatives in petrochemical wastewater using full factorial design of experiment

Shokri

2018

Int J Ind Chem

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In this study, the degradation and mineralization of petrochemical wastewater containing phenol and nitrophenol with chemical oxygen demand (COD) at 260 mg/L and total organic carbon (TOC) at 100 mg/L, were investigated by Sono-photo-Fenton process. The full factorial design of experiment was used to explore the influence of operational variables such as pH, initial concentration of hydrogen peroxide and Ferrous ions on the removal of COD. The analysis of variance (ANOVA) showed a high determination coefficient value (R 2 = 0.9884, R 2 pred = 0.9713, R 2 adj = 0.9822) for removal of COD and satisfactory prediction second-order regression model. The graphical response surface plots were employed to determine the optimum conditions. The operational variables were optimized by the model as follows: the [Fe 2+ ] = 24 mg/L, pH at 3, and [H 2 O 2 ] = 500 mg/L. The results showed that at the predicted optimum conditions and after 60 min of reaction, the degradation (removal of COD) and mineralization (removal of TOC) were 76.1 and 68.7%, respectively.

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Degradation of ethyl paraben in aqueous medium using advanced oxidation processes: Efficiency evaluation of UV-C supported oxidants

Cited by 93 publications

References 48 publications

Degradation of antibiotics by modified vacuum-UV based processes: Mechanistic consequences of H2O2 and K2S2O8 in the presence of halide ions

Degradation of antibiotics by modified vacuum-UV based processes: Mechanistic consequences of H2O2 and K2S2O8 in the presence of halide ions

Sulfate radicals-based degradation of antraquinone textile dye in a plug flow photoreactor

Application of Sono–photo-Fenton process for degradation of phenol derivatives in petrochemical wastewater using full factorial design of experiment

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