Application of UV–sulfite advanced reduction process to bromate removal

Botlaguduru, Venkata Sai Vamsi; Batchelor, Bill; Abdel‐Wahab, Ahmed

doi:10.1016/j.jwpe.2015.01.001

Cited by 80 publications

(33 citation statements)

References 20 publications

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“…5(a) for 0 mM sulphite), indicating that direct photolysis is not the main mechanism for 2,4-DCP degradation. Additionally, if direct photolysis would dominate the degradation mechanism, a higher sulphite dosage would lead to a decrease in the average light intensity to be absorbed by 2,4-DCP, thereby reducing the k obs [23,39]. The obtained experimental results (as shown in Fig.…”

Section: Effect Of Sulphite Dosementioning

confidence: 65%

“…7(b)), from 0.049 min −1 to 0.16 min −1 with a R 2 of 0.968). According to previous studies of Botlaguduru et al [23] and Liu et al [41], more reductive species are produced as more energy is introduced into the system (which can be absorbed by the reductants). Hence, higher UV irradiance improves the degradability of the pollutant.…”

Section: Effect Of Uv Intensitymentioning

confidence: 97%

“…5(b). Two degradation pathways were suggested by Botlaguduru [23]: (i) direct photolysis and (ii) a radical-reaction mechanism, which both contribute to the reduction of the target pollutant. Direct photolysis takes place when the pollutant absorbs photons under UV irradiation, is hence transformed to an excited state, and decomposed subsequently [44].…”

Section: Effect Of Sulphite Dosementioning

confidence: 99%

“…It has been reported that ARPs show great potential in degrading aliphatic halogenated organic components, such as 1,2-dichloroethane [20], vinyl chloride [21], and monochloroacetic acid [22]. Other publications report that ARPs are successful in removing inorganic disinfection by-products from drinking water [23]. The advantage of ARPs is that they destroy the target contaminants directly by converting them into simple and biodegradable by-products, instead of transferring them to another phase or generating intermediates with a higher toxicity [24,25].…”

Section: Introductionmentioning

confidence: 99%

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Effects of process variables and kinetics on the degradation of 2,4-dichlorophenol using advanced reduction processes (ARP)

Cabooter

Dewil

2018

Journal of Hazardous Materials

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This study aims at investigating the efficiency and kinetics of 2,4-DCP degradation via advanced reduction processes (ARP). Using UV light as activation method, the highest degradation efficiency of 2,4-DCP was obtained when using sulphite as a reducing agent. The highest degradation efficiency was observed under alkaline conditions (pH = 10.0), for high sulphite dosage and UV intensity, and low 2,4-DCP concentration. For all process conditions, first-order reaction rate kinetics were applicable. A quadratic polynomial equation fitted by a Box-Behnken Design was used as a statistical model and proved to be precise and reliable in describing the significance of the different process variables. The analysis of variance demonstrated that the experimental results were in good agreement with the predicted model (R = 0.9343), and solution pH, sulphite dose and UV intensity were found to be key process variables in the sulphite/UV ARP. Consequently, the present study provides a promising approach for the efficient degradation of 2,4-DCP with fast degradation kinetics.

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Section: Effect Of Sulphite Dosementioning

confidence: 65%

Section: Effect Of Uv Intensitymentioning

confidence: 97%

Section: Effect Of Sulphite Dosementioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Effects of process variables and kinetics on the degradation of 2,4-dichlorophenol using advanced reduction processes (ARP)

Cabooter

Dewil

2018

Journal of Hazardous Materials

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“…It is necessary to remove bromate from drinking water to avoid the deleterious toxic effects of these ions. The global scientific community made efforts to use photocatalytic reactions (Botlaguduru et al., 2015; Jung et al., 2014; Mills et al., 1996; Morais et al. 2020), adsorption using activated carbon and derivatives (Asami et al., 1999; Bhatnagar et al., 2009; Feng et al., 2019; Hong et al., 2016; Huang & Cheng, 2008), other adsorbents (Xu et al., 2012; Yang et al., 2018), ion exchange (Wiśniewski & Kabsch‐Korbutowicz, 2010), electrochemical reduction (Zhao et al., 2012), biological methods (Assunção et al., 2011; Hijnen et al., 1999), membrane technology (Kliber & Wiśniewski, 2011; Lin et al., 2020; Moslemi et al., 2012; Mustapha & Benamar, 2019), and coupled membrane processes (Hamid et al., 2020; Lai et al., 2018; Listiarini et al., 2010; Luo et al., 2017; Wiśniewski et al., 2014) for bromate removal from drinking water.…”

Section: Introductionmentioning

confidence: 99%

Detection of bromate in packaged drinking water and its removal using polyelectrolyte multilayer membranes

Shalumon

Aravindakumar

Aravind

2021

Environmental Quality Mgmt

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The use of bottled water is increasing every day even after the reported presence of microbial and other contaminants. The present study analyzed bromate in bottled water samples collected from four major cities in Kerala, India. It was found that about 40% of the samples contain bromate with a maximum concentration of 9.68 μg/L with an average of 1.56 μg/L. The study also includes the development of a multilayer membrane for the removal of bromate from water. Bilayers of quaternary chitosan salt (QCS)/sodium polystyrene sulfonate (PSS) were deposited on polyethersulfone (PES) microfiltration membrane and which are employed for bromate removal studies. Deposition of six bilayers of QCS/PSS increased the rejection efficiency from ∼4% to ∼84%. The influence of different fabrication and feed parameters on bromate removal efficiency was also studied. Six bilayers of QCS/PSS deposited at pH 2 with 0.5 M NaCl were found to be effective in removing > 90% of bromate from marketed bottled water samples with low energy expense. This study is recommended to implement such a multilayer system as a polishing step in the final stage of water purification in bottling plants to avoid possible contamination and toxicity of bromate in bottled water users.

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Advanced Reduction and Oxidation–Reduction Processes for Water Treatment

Batchelor

2019

Encyclopedia of Water

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Oxidation–reduction reactions are important processes for water treatment because they chemically change contaminants, rather than only transfer them from the water phase. However, the rates of many oxidation–reduction reactions limit their use as treatment processes. This limitation can be overcome by using highly reactive free radicals as the chemical reductant, and treatment processes that do this can be called advanced reduction processes (ARPs). Treatment processes that rely on both oxidizing and reducing radicals can be called advanced oxidation–reduction processes, and both are similar to advanced oxidation processes that apply oxidizing radicals to water treatment. This article reviews a number of applications of ARPs and summarizes the characteristics of some AORPs. ARPs have been applied to a wide range of contaminants including halogenated organics and oxidized inorganic compounds. The effects of important process variables such as incident photon flux, reagent concentration, target compound concentration, and solution pH are reviewed for ARPs, and a simple kinetic model is presented that describes much of their behavior that has been observed. The basic aspects of two important AORPs (electron beam irradiation and photocatalysis) are discussed, and a kinetic model describing the dose coefficient for electron beam treatment is presented.

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Application of UV–sulfite advanced reduction process to bromate removal

Cited by 80 publications

References 20 publications

Effects of process variables and kinetics on the degradation of 2,4-dichlorophenol using advanced reduction processes (ARP)

Effects of process variables and kinetics on the degradation of 2,4-dichlorophenol using advanced reduction processes (ARP)

Detection of bromate in packaged drinking water and its removal using polyelectrolyte multilayer membranes

Advanced Reduction and Oxidation–Reduction Processes for Water Treatment

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