What is the role of light in persulfate-based advanced oxidation for water treatment?

Yang, Jingling; Zhu, Mingshan; Dionysiou, Dionysios D.

doi:10.1016/j.watres.2020.116627

Cited by 258 publications

(57 citation statements)

References 102 publications

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“…Another essential advantage of the combined PDS/O 3 /UV (under the experimental conditions) is the energy-saving power lamp. Although a lower energy lamp (10 W) was used in this study, satisfactory decolorization effects were obtained without the need for a higher wattage lamp (e.g., 16 W in the study by Cuiping et al [55] or 300 W in the study by Rokesh et al [51]). Hence, RhB need less energy consumption for degradation.…”

Section: Comparison With Other Aopsmentioning

confidence: 84%

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Degradation Efficiency and Kinetics Analysis of an Advanced Oxidation Process Utilizing Ozone, Hydrogen Peroxide and Persulfate to Degrade the Dye Rhodamine B

Zawadzki

Deska

2021

Catalysts

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In this study, the effectiveness of a rhodamine B (RhB) dye degradation process at a concentration of 20 mg/L in different advanced oxidation processes—H2O2/UV, O3/UV and PDS/UV—has been studied. The use of UV in a photo-assisted ozonation process (O3/UV) proved to be the most effective method of RhB decolorization (90% after 30 min at dye concentration of 100 mg/L). The addition of sulfate radical precursors (sodium persulfate, PDS) to the reaction environment did not give satisfactory effects (17% after 30 min), compared to the PDS/UV system (70% after 30 min). No rhodamine B decolorization was observed using hydrogen peroxide as a sole reagent, whereas an effect on the degree of RhB degradation was observed when UV rays strike the sample with H2O2 (33% after 30 min). The rhodamine B degradation process followed the pseudo-first-order kinetics model. The combined PDS/O3/UV process has shown 60% color removal after 30 min of reaction time at an initial dye concentration of 100 mg/L. A similar effectiveness was obtained by only applying ozone or UV-activated persulfate, but at a concentration 2–5 times lower (20 mg/L). The results indicated that the combined PDS/O3/UV process is a promising method for high RhB concentrations (50–100 mg/L) comparing to other alternative advanced oxidation processes.

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Section: Comparison With Other Aopsmentioning

confidence: 84%

“…In sulfate radicals-based processes, it is possible to achieve organic pollutant degradation under the influence of both sulfate and hydroxyl radicals. Activation of PS or PMS results in the generation of sulfate radicals, or both sulfate and hydroxyl radicals, for PS and PMS respectively [14][15][16].…”

Section: Chemical Structurementioning

confidence: 99%

Degradation Efficiency and Kinetics Analysis of an Advanced Oxidation Process Utilizing Ozone, Hydrogen Peroxide and Persulfate to Degrade the Dye Rhodamine B

Zawadzki

Deska

2021

Catalysts

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“…To date, sulfate radical-based AOPs have emerged as an advanced technology for water and wastewater treatment [3,4]. Sulfate anion radicals have many advantages over HO • such as a higher red-ox potential, a longer half-life and a broader range of operating conditions [5]. They can be generated upon the activation of persulfates with heat, ultraviolet (UV) radiation, ultrasound, microwave radiation or in the presence of transition metals [6][7][8].…”

Section: Introductionmentioning

confidence: 99%

“…Photo-activated persulfate-based AOPs have been intensively developed over the last years and recognized as a highly efficient method of pollutant degradation and a cost-effective way of up-scaling the water treatment [5,9]. Apart from activating persulfate directly, UV irradiation also enhances a Fenton-like process involving persulfate and ferrous ions.…”

Section: Introductionmentioning

confidence: 99%

Degradation of Bisphenol A in an Aqueous Solution by a Photo-Fenton-Like Process Using a UV KrCl Excilamp

Aseev

Батоева

Sizykh

et al. 2021

IJERPH

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Bisphenol A (BPA), a precursor to important plastics, is regarded as a common aquatic micropollutant with endocrine-disrupting activity. In the present study, we explored the capability of a UV KrCl excilamp (222 nm) to degrade BPA by a photo-Fenton-like process using persulfate under flow-through conditions. The first-order rate constants of degradation were obtained and the mineralization of dissolved organic carbon (DOC) was estimated. The results showed complete BPA degradation and high DOC mineralization (70–97%). A comparative analysis of degradation rates and DOC removal in the examined systems (UV, Fe2+/S2O82−, UV/S2O82− and UV/Fe2+/S2O82−) revealed a significant synergistic effect in the photo-Fenton-like system (UV/Fe2+/S2O82−) without the accumulation of toxic intermediates. This indicated that the BPA was oxidized via the conjugated radical chain mechanism, which was based on the photo-induced and catalytic processes involving HO• and SO4−• radicals. The primary intermediates of BPA degradation in the UV/Fe2+/S2O82− system were identified by HPLC/MS and the oxidation pathway was proposed. The high performance of the photo-Fenton-like process employing a quasi-monochromatic UV radiation of a KrCl excilamp offers promising potential for an efficient removal of such micropollutants from aqueous media.

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“…В настоящее время в мировой литературе накоплен достаточно обширный материал, доказывающий перспективность использования фотоактивированных SR-AOPs методов для окислительной деструкции биорезистентных органических загрязнителей. В большинстве работ в качестве источников УФ-излучения используют ртутные лампы низкого и среднего давления[16]. Растет интерес исследователей к использованию полихроматического естественного солнечного излучения (Solar) для интенсификации окислительной деструкции стойких органических загрязнителей, инактивации патогенной микрофлоры[17].…”

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Effect of Anions and Related Organic Compounds on the Kinetics of Thiocyanate Oxidation in a Solar-induced Oxidative System

Batoeva¹

2022

J. Sib. Fed. Chem.

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The effect of anions (hydrocarbonates, chlorides, sulfates) and organic compounds (xanthates) on the kinetics of thiocyanate oxidation in a photoinduced iron-persulfate system was studied using natural sunlight as a radiation source. It was found that the introduction of anions into the solution inhibits the degradation of thiocyanates. Hydrocarbonates have the maximum effect, so at a HCO–3 concentration of 1 mM, the processing time required for the complete destruction of thiocyanates increased from 6 to 15.7 minutes. At high concentrations of bicarbonates (≥5 mM), the oxidation efficiency of thiocyanates does not exceed 52 %. The adding of butyl xanthate into the solution has no significant effect on the photochemical oxidation of thiocyanates. In real water matrices (tap water and circulating water of the tailing dump of a gold mining plant), oxidative processes are significantly slowed down. In tap water, this effect is mainly due to the influence of hydrocarbonates, and in waste water, it is due to the multicomponent nature of the water matrix. The efficiency of wastewater treatment from thiocyanates was 100 %, for COD – 82 %, for dissolved organic carbon – 65 %. No cyanides were found after the treatment

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What is the role of light in persulfate-based advanced oxidation for water treatment?

Cited by 258 publications

References 102 publications

Degradation Efficiency and Kinetics Analysis of an Advanced Oxidation Process Utilizing Ozone, Hydrogen Peroxide and Persulfate to Degrade the Dye Rhodamine B

Degradation Efficiency and Kinetics Analysis of an Advanced Oxidation Process Utilizing Ozone, Hydrogen Peroxide and Persulfate to Degrade the Dye Rhodamine B

Degradation of Bisphenol A in an Aqueous Solution by a Photo-Fenton-Like Process Using a UV KrCl Excilamp

Effect of Anions and Related Organic Compounds on the Kinetics of Thiocyanate Oxidation in a Solar-induced Oxidative System

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