Comparative evaluation of iodoacids removal by UV/persulfate and UV/H2O2 processes

Xiao, Yongjun; Zhang, Lifeng; Zhang, Wei; Lim, Kok-Yong; Webster, Richard D.; Lim, Tuti Mariana

doi:10.1016/j.watres.2016.07.004

Cited by 220 publications

(25 citation statements)

References 37 publications

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“…Higher mineralization rates through UV-C/S2O8 2can likely be explained by the greater selectivity and lifespan of sulfate radicals in comparison to hydroxyl radicals as it is less reactive with inorganic species that may be formed during the degradation of target compounds (O, Cl-, NO3and CO3 2-, HCO3 2-), and also towards S2O8 2and sulfate radical itself (self-scavenging), thus increasing its persistence in the system. This was also reported with other compounds such as 2,4-D, carbamazepine, and azathioprine [14,[66][67][68]. In addition, the ability UV-C/S2O8 2-to degrade carboxylic acids and intermediate products usually formed during oxidation processes has been previously confirmed [16].…”

Section: Acute Toxicity Assayssupporting

confidence: 72%

Intensification of UV-C treatment to remove emerging contaminants by UV-C/H2O2 and UV-C/S2O82−: Susceptibility to photolysis and investigation of acute toxicity

Starling

Souza

Person

et al. 2019

Chemical Engineering Journal

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In this study, the degradation of four emerging contaminants (losartan potassium (LP), furosemide (FRSM), caffeine (CAF), and carbendazim (CBZ) under UV-C, UV-C/H2O2, and UV-C/S2O8 2was investigated. A comparative evaluation of the efficiency of UV-C/H2O2 and UV-C/S2O8 2in the degradation of these target CECs has not yet been reported. Moreover, target compounds were submitted to UV-C/AOPs individually in pure water and their simultaneous degradation was investigated in real surface water. Evolution of the acute toxicity of each compound during treatment was evaluated using Alivibrio fischeri. Quantum yields were determined for LP (0.011 to 0.016), FRSM (0.024 to 0.092), CAF (0.0007 to 0.0009), and CBZ (0.0016 to 0.0036) at different pH values. UV-C/H2O2 and UV-C/S2O8 2 achieved more than 98% removal of all compounds within 600 mJ cm-2 , and pseudo-fist-order kinetic constants (k'app) for the 2 degradation reactions were up to seven times higher in the presence of these oxidants when compared to k'app values obtained for UV-C photolysis. k'app measured for UV-C/H2O2 were higher than those calculated for UV-C/S2O8 2except in the case of LP. Acute toxicity analysis suggested the formation of toxic intermediates during the UV-C photolysis of LP and FRSM, and the degradation of LP via UV-C/S2O8 2also enhaced acute toxicity although electric energy efficiency per order identified UV-C/S2O8 2 as the most efficient process for the removal of this compound. Finally, different transformation products obtained during the degradation of caffeine under the different UV-C AOPs suggested that distinct degradation routes were involved in each treatment tested.

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Section: Acute Toxicity Assayssupporting

confidence: 72%

Intensification of UV-C treatment to remove emerging contaminants by UV-C/H2O2 and UV-C/S2O82−: Susceptibility to photolysis and investigation of acute toxicity

Starling

Souza

Person

et al. 2019

Chemical Engineering Journal

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“…Zhang et al [ 33 ] found a higher removal of sulfonamide antibiotics when comparing the same processes. Xiao et al [ 34 ] had similar results when testing disinfection byproducts, with UV/PDS giving a superior performance to UV/H 2 O 2 .…”

Section: Resultsmentioning

confidence: 84%

Fate of artificial sweeteners through wastewater treatment plants and water treatment processes

Ren

et al. 2018

PLoS ONE

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Five full-scale wastewater treatment plants (WWTPs) in China using typical biodegradation processes (SBR, oxidation ditch, A2/O) were selected to assess the removal of four popular artificial sweeteners (ASs). All four ASs (acesulfame (ACE), sucralose (SUC), cyclamate (CYC) and saccharin (SAC)) were detected, ranging from 0.43 to 27.34μg/L in the influent. Higher concentrations of ASs were measured in winter. ACE could be partly removed by 7.11–50.76% through biodegradation and especially through the denitrifying process. The A2/O process was the most efficient at biodegrading ASs. Adsorption (by granular activated carbon (GAC) and magnetic resin) and ultraviolet radiation-based advanced oxidation processes (UV/AOPs) were evaluated to remove ASs in laboratory-scale tests. The amounts of resin adsorbed were 3.33–18.51 times more than those of GAC except for SUC. The adsorption ability of resin decreased in the order of SAC > ACE > CYC > SUC in accordance with the pKa. Degradation of ASs followed pseudo-first-order kinetics in UV/H2O2 and UV/PDS. When applied to the secondary effluent, ASs could be degraded from 30.87 to 99.93% using UV/PDS in 30 minutes and UV/PDS was more efficient and economic.

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“…•− , E 0 = 2.5-3.1 V) (Buxton et al, 1988;Neta et al, 1988). As efficient and environmental friendly techniques, HO • or SO 4 •− based AOPs have been extensively investigated for the treatment of contaminants in water under UV irradiation (UVA, UVB and UVC) (Huang et al, 2018;Minella et al, 2019;Mosteo et al, 2020;Xiao et al, 2016;Xu et al, 2016;Yang et al, 2016;Zhang et al, 2015;Zhou et al, 2017b). Compared with UVA and UVC, UVB based oxidation has great potential due to: i) possible use of LED ii) considerably less energy requirement than UVC (Beck et al, 2017) and iii) higher efficiency for contaminant degradation than UVA (Joseph et al, 2016).…”

Section: Introductionmentioning

confidence: 99%

Phenanthrene decomposition in soil washing effluents using UVB activation of hydrogen peroxide and peroxydisulfate

et al. 2021

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HAL is a multi-disciplinary open access archive for the deposit and dissemination of scientific research documents, whether they are published or not. The documents may come from teaching and research institutions in France or abroad, or from public or private research centers. L'archive ouverte pluridisciplinaire HAL, est destinée au dépôt et à la diffusion de documents scientifiques de niveau recherche, publiés ou non, émanant des établissements d'enseignement et de recherche français ou étrangers, des laboratoires publics ou privés.

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Comparative evaluation of iodoacids removal by UV/persulfate and UV/H2O2 processes

Cited by 220 publications

References 37 publications

Intensification of UV-C treatment to remove emerging contaminants by UV-C/H2O2 and UV-C/S2O82−: Susceptibility to photolysis and investigation of acute toxicity

Intensification of UV-C treatment to remove emerging contaminants by UV-C/H2O2 and UV-C/S2O82−: Susceptibility to photolysis and investigation of acute toxicity

Fate of artificial sweeteners through wastewater treatment plants and water treatment processes

Phenanthrene decomposition in soil washing effluents using UVB activation of hydrogen peroxide and peroxydisulfate

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