Formation of bromate in sulfate radical based oxidation: Mechanistic aspects and suppression by dissolved organic matter

Lutze, Holger V.; Bakkour, Rani; Kerlin, Nils; Sonntag, Clemens von; Schmidt, Torsten

doi:10.1016/j.watres.2014.01.001

Cited by 122 publications

(52 citation statements)

References 44 publications

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“…• or HO• has been reported [32]. As for the BiOBr/PMS system, bromide-ion releasing ( Figure 4) and radicals (SO • and HO•, Figure 5) have been detected, and bromate formation should be given concern.…”

Section: Bromate Formationmentioning

confidence: 95%

“…Within a 30-min reaction time, no detectable bromate formation (<0.002 µg·L −1 ) for ESF and QZL has been observed, while significant bromate formation happened for ultrapure water (14.3 µM) and TP (1.2 µM). Suppression of bromate formation by natural organic matters in AOTs has been reported [32,33], which is ascribed to scavenging of reactive bromine species and radicals by natural organic matter. A similar effect caused by DOM in ESF, TP and QZL is expected.…”

Section: Bromate Formationmentioning

confidence: 98%

“…Suppression of bromate formation by natural organic matters in AOTs has been reported [32,33], which is ascribed to scavenging of reactive bromine species and radicals by natural organic matter. A similar effect caused by DOM in ESF, TP and QZL is expected.…”

Section: Bromate Formationmentioning

confidence: 98%

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Efficient Degradation of Aqueous Carbamazepine by Bismuth Oxybromide-Activated Peroxide Oxidation

Zhang

Chu

et al. 2017

Catalysts

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Bismuth oxyhalide, usually employed as a photocatalyst, has not been tested as an activator of peroxide for water purification. This work explores the potential application of bismuth oxyhalide (BiOX, X = Cl, Br, I)-activated peroxide (H 2 O 2 ; peroxymonosulfate (PMS) and peroxydisulfate) systems for the degradation of carbamazepine (CBZ) in water destined for drinking water. BiOBr showed the highest activity toward the peroxides investigated, especially toward PMS. The most efficient combination, BiOBr/PMS, was selected to further research predominant species responsible for CBZ degradation and toxicity of transformation products. With repeated use of BiOBr, low bismuth-leaching and subtle changes in crystallinity and activity were observed. CBZ degradation was primarily (67.3%) attributable to attack by sulfate radical. Toxicity test and identification of the oxidation products indicated some toxic intermediates may be produced. A possible degradation pathway is proposed. Besides substitution of the hydroxyl groups on the surface of the catalyst particles, PMS's complexation with the lattice Bi(III) through ion exchange with interlayer bromide ion was involved in the decomposition of PMS. The Bi(III)-Bi(V)-Bi(III) redox cycle contributed to the efficient generation of sulfate radicals from the PMS. Our findings provide a simple and efficient process to produce powerful radicals from PMS for refractory pollutant removal.

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Section: Bromate Formationmentioning

confidence: 95%

Section: Bromate Formationmentioning

confidence: 98%

See 1 more Smart Citation

Efficient Degradation of Aqueous Carbamazepine by Bismuth Oxybromide-Activated Peroxide Oxidation

Zhang

Chu

et al. 2017

Catalysts

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“…The SO 4 · -, though more selective than HO·, is also a strong oxidant (E°S O4 · -=2.5 -3.1 V [12]; E°H O· =2.4 -2.7 V at acidic pH, E°H O· =1.9 -2.0 V at alkaline pH [17]). Though more research studies are still implicated in understand the reaction mechanisms involving sulfate radical, the latter has been shown to be capable of oxidizing bromide into bromate, the process of which could be strongly suppressed in the presence of natural organic matter [24,25].…”

Section: Introductionmentioning

confidence: 99%

Effects of bromide on the degradation of organic contaminants with UV and Fe2+ activated persulfate

Luca

Dionysiou

et al. 2017

Chemical Engineering Journal

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“…In this study, sulfate radical (SR, SO 4 Á-) was selected for the treatment of sugarcane vinasse. SR has been frequently reported as an alternative oxidant for pollutant treatment (Lutze et al 2014). Its efficiency in the treatment of various types of wastewater has been frequently evaluated Zhao et al 2014).…”

Section: Introductionmentioning

confidence: 99%

Mineralization of organic matter from vinasse using physicochemical treatment coupled with Fe2+-activated persulfate and peroxymonosulfate oxidation

Fagier

Ali

Tay

et al. 2016

Int. J. Environ. Sci. Technol.

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Application of advanced oxidation process for wastewater treatment has gained more attention recently. In this study, the efficiency of coagulation-flocculation pretreatment coupled with sulfate radical-based advanced oxidation process (SR-AOP) in the removal and mineralization of organic matter of sugarcane vinasse was evaluated. For coagulation-flocculation, jar-test experiment was carried out with ferric chloride as coagulant and the removal of TOC, color and UV 254 was determined. The results revealed that by using 15 g/L of coagulant, 70 % of TOC removal and nearly 100 % of UV 254 and color removal were achieved. The pretreated vinasse was then subjected to SR-AOP. In this study, sulfate radical was generated using persulfate (PS) and peroxymonosulfate (PMS) activated by Fe(II). The effect of reaction time, oxidants to Fe(II) ratio and pH on the TOC removal efficiency were investigated. For the effect of reaction time, the TOC removal was found to increase significantly for the first 5 min. TOC removal was found to increase with increasing concentration of Fe(II) for PMS. However, for Fe(II)/PS, the TOC removal efficiency was decreased with increasing Fe(II) concentration. Both Fe(II)/ PMS and Fe(II)/PS showed the highest TOC removal efficiency when the oxidation was carried out at pH 7. By using the selected optimum condition, nearly 70 and 49 % of TOC removal were achieved for PMS/Fe(II) and PS/Fe(II), respectively. Therefore, it can be concluded that SR-AOP can be a promising alternative method for TOC removal from sugarcane vinasse.

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Formation of bromate in sulfate radical based oxidation: Mechanistic aspects and suppression by dissolved organic matter

Cited by 122 publications

References 44 publications

Efficient Degradation of Aqueous Carbamazepine by Bismuth Oxybromide-Activated Peroxide Oxidation

Efficient Degradation of Aqueous Carbamazepine by Bismuth Oxybromide-Activated Peroxide Oxidation

Effects of bromide on the degradation of organic contaminants with UV and Fe2+ activated persulfate

Mineralization of organic matter from vinasse using physicochemical treatment coupled with Fe2+-activated persulfate and peroxymonosulfate oxidation

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