Advanced oxidation processes for the removal of [bmim][Sal] third generation ionic liquids: effect of water matrices and intermediates identification

Banić, Nemanja; Abramović, Biljana F.; Šibul, Filip; Orčić, Dejan; Watson, Malcolm; Vraneš, Milan; Gadžurić, Slobodan

doi:10.1039/c6ra04416f

Cited by 19 publications

(11 citation statements)

References 43 publications

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“…Furthermore, H 2 O 2 concentration affected the Fenton process performance (Table 5), but only a maximum of 26.47% mineralization was achieved after 24 h treatment time. These results are in concordance with Banic et al [40], who degraded 27% of the ionic liquid 3-methylimidazolium chloride under a homogeneous Fenton process which needed to be coupled to photocatalysis for having an acceptable degradation rate (80%). Thus, the Fenton process itself seems to be not efficient for ionic liquid degradation and adsorbent regeneration even with the addition of high H 2 O 2 concentrations.…”

Section: Fixed-bed Adsorption and Breakthrough Curvesupporting

confidence: 91%

Iron-Loaded Catalytic Silicate Adsorbents: Synthesis, Characterization, Electroregeneration and Application for Continuous Removal of 1-Butylpyridinium Chloride

et al. 2020

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This research proposes the application of iron-loaded sepiolite (S-Fe) as a catalytic adsorbent for the unreported 1-butylpyridinium chloride ([bpy] Cl) treatment in an aqueous medium. Initially, sepiolite was selected as an inexpensive and efficacious adsorbent for [bpy] Cl elimination. After that, sepiolite was loaded with iron for the subsequent electro-Fenton (EF) regeneration treatment. Once kinetic and isotherm studies were performed, providing respectively almost instantaneous adsorption (20 min) and an uptake of 22.85 mg/g, [bpy] Cl adsorption onto S-Fe was studied in continuous mode. The obtained breakthrough curve was analyzed using three standard breakthrough models, being Yoon–Nelson and Thomas the most suitable adjustments. Afterwards, S-Fe regeneration by the EF process was conducted using this iron-loaded silicate material as a heterogeneous catalyst. Under optimized operational conditions (current intensity 300 mA and Na2SO4 0.3 M), complete adsorbent regeneration was achieved in 10 h. The total mineralization of [bpy] Cl was reached within 24 h and among seven carboxylic acids detected, oxalic and acetic acids seem to be the primary carboxylic acids produced by [bpy] Cl degradation. Finally, S-Fe was efficiently used in four consecutive adsorption–regeneration cycles without a noticeable reduction in its adsorption capacity, opening a path for future uses.

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Section: Fixed-bed Adsorption and Breakthrough Curvesupporting

confidence: 91%

Iron-Loaded Catalytic Silicate Adsorbents: Synthesis, Characterization, Electroregeneration and Application for Continuous Removal of 1-Butylpyridinium Chloride

et al. 2020

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“…This is in accordance with the obtained DRS spectra, based on which it is assumed that this catalyst exhibits photocatalytic activity in the visible part of the electromagnetic spectrum. Experimental results also indicate that the overall efficiency of photocatalytic degradation in the presence of SS radiation is the result of the heterogeneous photo-Fenton process [57,58], as well as of the coupling effect of the semiconductors WO3 and Fe3O4 [59,60]. To examine which of these effects is dominant,…”

Section: Effect Of Calcination Temperaturementioning

confidence: 99%

Novel WO3/Fe3O4 magnetic photocatalysts: Preparation, characterization and thiacloprid photodegradation

Banić

Abramović

Krstić

et al. 2019

Journal of Industrial and Engineering Chemistry

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This work presents the characterization of novel synthesized WO3/Fe3O4 catalysts and investigates their photocatalytic activity for thiacloprid decomposition under UV and simulated sunlight radiation. Four WO3/Fe3O4 nanopowders with different amounts of WO3 were synthesized by chemical co-precipitation method. XRD analysis showed the presence of hematite and magnetite nano-dimensional phases of Fe3O4 in the catalysts. The magnetite phase content increased with increasing WO3 content. Degradation efficiency of thiacloprid in the presence of 6.1WO3/Fe3O4/H2O2 under simulated solar radiation was 2.2 times higher compared to Fe3O4. Under an external magnetic field, a significant increase in the catalysts separation from reaction mixture was observed.

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“…Up to now, various techniques have been studied for the ionic liquids removal from wastewater, including ultrasonic, 5–7 electrolytic, 8–14 fenton, 15–19 electro‐fenton, 20,21 biological process, 3 photocatalysis, 22,23 and advanced oxidation process 24–27 . Kaabeche et al.…”

Section: Introductionmentioning

confidence: 99%

Effects of sodium persulfate and hydrogen peroxide on imidazolium ionic liquid degradation by simulated solar light in aqueous ZnO suspension

Boutiti

Zouaghi

Guittonneau

et al. 2023

Int J of Chemical Kinetics

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The degradation of an ionic liquid: hexyl methyl imidazolium chloride (HMImCl) in the systems of simulated solar light/ZnO and simulated solar light/ZnO/oxidant (i.e., H 2 O 2 and S 2 O 8 2− ) were investigated in aqueous solution.The influences of different variables such as catalyst concentration, hydrogen peroxide, and persulfate dosage on HMImCl photocatalytic degradation were determined. It was found that the adsorption of HMImCl on the catalyst surface was insignificant. The photocatalytic degradation of HMImCl followed pseudo first-order kinetics, and the rate constant at natural pH (pH 7.2) was 11.8 × 10 −2 min −1 . The addition of hydrogen peroxide to the process not only does not enhance the degradation rate of HMImCl but also decreases k app significantly with [HMImCl] = 3×10 −5 mol L −1 , oxidant concentration (in the range of 5 × 10 −5 -10 −1 mol L −1 ), and catalyst concentration of 1 g L −1 . The results elucidated that the use of Na 2 S 2 O 8 (in the range of 10 −4 -10 −2 mol L −1 ) strongly enhances the degradation rate of HMImCl compared with photocatalytic process of the catalyst.

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Advanced oxidation processes for the removal of [bmim][Sal] third generation ionic liquids: effect of water matrices and intermediates identification

Abstract: Unique properties of ionic liquids make them green alternatives for conventional volatile organic compounds. In order to examine future prospects for ionic liquid removal, different advanced oxidation processes were studied.

Cited by 19 publications

References 43 publications

Iron-Loaded Catalytic Silicate Adsorbents: Synthesis, Characterization, Electroregeneration and Application for Continuous Removal of 1-Butylpyridinium Chloride

Iron-Loaded Catalytic Silicate Adsorbents: Synthesis, Characterization, Electroregeneration and Application for Continuous Removal of 1-Butylpyridinium Chloride

Novel WO3/Fe3O4 magnetic photocatalysts: Preparation, characterization and thiacloprid photodegradation

Effects of sodium persulfate and hydrogen peroxide on imidazolium ionic liquid degradation by simulated solar light in aqueous ZnO suspension

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