Persulfate activation by iron oxide-immobilized MnO2 composite: Identification of iron oxide and the optimum pH for degradations

Jo, Young-Hoon; Do, Si-Hyun; Kong, Sung-Ho

doi:10.1016/j.chemosphere.2013.10.010

Cited by 42 publications

(12 citation statements)

References 41 publications

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“…The XPS spectra of iron oxide-immobilized MnO 2 composite in the other studies exhibited the Fe 2+ : Fe 3+ ratio of 0.68 : 0.32 (Jo et al 2014). Fe 2+ -bearing minerals like magnetite (Fe 3 O 4 ) were found to be competitive to only Fe 3+ oxides for oxidation of organic pollutants under heterogeneous condition (Usman et al 2012).…”

Section: Resultsmentioning

confidence: 99%

“…The reactivity of PS was also affected by adding manganese oxide (see Figure 3). Other studies indicated that when manganese dioxide was used along with Fe 2+ , the possible crystal lines like jacobsite (MnFe 2 O 4 ), magnetite (Fe 3 O 4 ), wüstite (Fe 1-y O), and maghemite (γ-Fe 2 O 3 ) might be produced (Ma et al 2003;Cao et al 2008;Jo et al 2014). When MnO 2 was used along with magnetite, the efficiency of oxidation process improved, such that the fuel oil removal in sample A was increased from 35% Do et al (2013) (Do et al 2010).…”

Section: Resultsmentioning

confidence: 99%

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Remediation of fuel oil contaminated soils by activated persulfate in the presence of MnO<sub>2</sub>

Mazloomi¹,

Nasseri²,

Nabizadeh³

et al. 2016

Soil & Water Res.

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Mazloomi S., Nasseri S., Nabizadeh R., Yaghmaeian K., Alimohammadi K., Nazmara S., Mahvi A.H. (2016): Remediation of fuel oil contaminated soils by activated persulfate in the presence of MnO 2 . Soil & Water Res., 11: 131-138.In this study, batch system experiments were carried out for evaluating the capability of persulfate (PS) to remediate fuel oil contaminated soils. Remediation was performed by spiking soil samples with fuel oil and then treating the mixture with sodium PS. Different controlling factors including pH (3, 6, and 9), PS concentrations (50-500 mmol/l), metal activators (ferrous sulfate, magnetite, and MnO 2 ), and temperature (25, 40, and 60°C) were considered. Results proved that PS oxidation is effective in fuel oil degradation. The best PS : Fe 2+ molar ratios were reported 400 : 2 and 250 : 1 for silty clay and loamy sand soil samples, respectively. Lower pH was more of interest in removal of fuel oil by PS oxidation. MnO 2 improved fuel oil degradation when used together with metal activators. The results showed that when MnO 2 was used together with ferrous sulfate and magnetite at acidic condition (pH = 3), the removal efficiencies were the best. Increasing temperature from 25 to 60°C improved the fuel oil degradation in the PS oxidation batch system. The results showed that activating PS by using ferrous sulfate along with MnO 2 at acidic condition in 60°C could increase fuel oil degradation near to 58% in silty clay soil samples, while the degradation rate for loamy sand soil samples in similar conditions was 62%.

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Remediation of fuel oil contaminated soils by activated persulfate in the presence of MnO<sub>2</sub>

Mazloomi¹,

Nasseri²,

Nabizadeh³

et al. 2016

Soil & Water Res.

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“…The first of these is self-decomposition to form a proton and HO 2 − that continues to form an electron and HO 2 ·, which generates superoxide radical as the dominant ROS to degrade BZA. This process could be enhanced by the circular reaction between Mn 3+ and Mn 4+ [65,66]. The second H 2 O 2 decomposition is catalytic decomposition by Cu 2+ to generate Cu + and HO 2 ·, which then forms the superoxide radical [46].…”

Section: Surface Adsorption and Fenton-like Reaction Mechanismmentioning

confidence: 98%

Degradation of benzotriazole by a novel Fenton-like reaction with mesoporous Cu/MnO 2 : Combination of adsorption and catalysis oxidation

Zhang

Cao

et al. 2016

Applied Catalysis B: Environmental

226

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“…Several types of Fe-based catalysts were used for the chemical activation of persulfate, including nano-sized zero-valent iron (Fe 0 ) , biochar supported nano-sized Fe 0 (Yan et al, 2015), zero-valent iron powder Li et al, 2014b), Fe-immobilized resin chars (Shi et al, 2015), Fe oxide-immobilized MnO 2 composite (Jo et al, 2014), Fe 2 O 3 (Zhu et al, 2013), ferrous iron (Han et al, 2014), ferrous sulfide ore particles , and Fe 3 O 4 magnetic nanoparticles (Zhao et al, 2015). Influence of particle size of Fe 0 and comparison of various forms of Fe on the reactivity of activated persulfate oxidation have been studied (Li et al, 2014a;Rodriguez et al, 2014).…”

Section: Introductionmentioning

confidence: 99%

Highly efficient persulfate oxidation process activated with Fe0 aggregate for decolorization of reactive azo dye Remazol Golden Yellow

Weng

Tao

2018

Arabian Journal of Chemistry

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The commercially available Fe 0 aggregate has advantages of low-cost, fast-effective decontamination, reusability, and ease of operation. However, little study has been done on the performance of Fe 0 aggregate as a catalyst in degradation of azo dyes, particularly used in persulfate (PS) oxidation process. This study investigated decolorization of a reactive azo dye, Remazol Golden Yellow (RGY, Reactive Orange 107), by persulfate oxidation activated with Fe 0 aggregate. RGY decolorization was not effective in ultrasound-activated, heat-activated, and base-activated persulfate oxidation; however, a significant decolorization improvement was achieved by applying Fe 0 aggregate to activated persulfate (PS/Fe 0 ). Decolorization was strongly influenced by pH, Fe 0 , persulfate dosages and temperature. The suitable conditions for RGY decolorization were pH 6.0, PS 5 · 10 -3 M, and Fe 0 0.5 g/L. This condition yields 98% color removal of 100 mg/L RGY solution within 20 min treatment; the azo bonds of RGY were completely broken down. RGY decolorization followed the first-order kinetics. Activation energy of the PS/Fe 0 system was 0.479 kJ/mol, suggesting the temperature dependence of RGY decolorization is small. The presence of inorganic salt in RGY solution had an adverse effect on decolorization. The inhibitory effect of various inorganic salts on decolorization followed the sequence of Na 2 HPO 4 ) NaHCO 3 ) NaClO 4 > NaCl > NaNO 3 > NaClO 4 > no salt. The Fe 0 aggregate was reusable and a satisfactory decolorization efficiency was achieved with the repeated use of Fe 0 for five times. The PS/Fe 0 process provides an efficiency and effective technology for RGY decolorization. ª 2015 The Authors. Production and hosting by Elsevier B.V. on behalf of King Saud University. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/).

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Persulfate activation by iron oxide-immobilized MnO2 composite: Identification of iron oxide and the optimum pH for degradations

Cited by 42 publications

References 41 publications

Remediation of fuel oil contaminated soils by activated persulfate in the presence of MnO<sub>2</sub>

Remediation of fuel oil contaminated soils by activated persulfate in the presence of MnO<sub>2</sub>

Degradation of benzotriazole by a novel Fenton-like reaction with mesoporous Cu/MnO 2 : Combination of adsorption and catalysis oxidation

Highly efficient persulfate oxidation process activated with Fe0 aggregate for decolorization of reactive azo dye Remazol Golden Yellow

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