Preparation of CoFe2O4/MWNTs/sponge electrode to enhance dielectric barrier plasma discharge for degradation of phenylic pollutants and Cr(VI) reduction

Long, Yupei; Nie, Jutao; Yuan, Changxia; Ma, Hao; Chen, Yuqi; Cong, Yanqing; Wang, Qi; Zhang, Yi

doi:10.1016/j.apcatb.2020.119604

Cited by 38 publications

(11 citation statements)

References 71 publications

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“…Physical and biological approaches are the conventional methods for wastewater remediation. Modified from (Gusain et al 2019) Recently, the advanced oxidation process by photocatalysis approach has been acknowledged as an excellent approach for water contaminants removal owing to its vast potential and feasibility in removing various toxic water pollutants even at low concentrations (Long et al 2021). In addition, organic contaminants also can be entirely mineralized into carbon dioxide and water, using the photocatalysis approach (Rashed et al 2017).…”

Section: Photocatalysismentioning

confidence: 99%

“…Moreover, photocatalysis approach is a simple process that requires low energy input for the operation (Peng and Guo 2020). The photocatalytic remediation method is able to completely degrade or reduce even at low concentrations of hazardous pollutants in the polluted water into water and carbon dioxide (Cherifi et al 2020;Long et al 2021). Fascinatingly, photocatalysis approach is capable of simultaneously oxidizing organic pollutants and reducing inorganic pollutants, which greatly improves the photocatalytic performance and reduces treatment cost due to the coexistence of organic and inorganic pollutants.…”

Section: Photocatalysismentioning

confidence: 99%

“…Globally, the increase in toxic pollutants in natural water has caused quite a lot of concern, stimulating intensive research on advanced water treatment technologies (Wang et al 2019). The advanced oxidation process, particularly photocatalysis, has recently aroused attention as a promising wastewater remediation approach due to its feasibility in wastewater treatment application (Long et al 2021). To date, heterogeneous photocatalysis of transition metal oxide-based photocatalyst has proved its capability in removing a wide range of distinct contaminants into harmless products of carbon dioxide and water (Gusain et al 2019).…”

Section: Introductionmentioning

confidence: 99%

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Simultaneous remediation of hexavalent chromium and organic pollutants in wastewater using period 4 transition metal oxide-based photocatalysts: a review

et al. 2021

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The contamination by hexavalent chromium and organic pollutants is a serious health issue. Moreover, hexavalent chromium can react with organic pollutants to form a complex which is difficult to treat, and thus remains in the natural environment for long times. Simultaneous photocatalysis can remove both organic pollutants and hexavalent chromium. Here we review the use of period 4 metal oxide-based photocatalysts for the removal of organic pollutants and hexavalent chromium. Titanium dioxide exhibited the highest performance, up to 100%, in removing both hexavalent chromium and organic pollutants from water. KeywordsTransition metal oxide • Period 4 • Simultaneous redox • Hexavalent chromium • Organic pollutants • Photocatalysis Abbreviations PAN/TiO 2 /Ag Modified polyacrylonitrile by silverdoped titanium dioxide TiO 2 /BiOCl Titanium dioxide supported by bismuth oxychloride A/R-TiO 2 Anatase/rutile titanium dioxide A/R-TiO 2 /BiOI Anatase-/rutile titanium dioxidesupported bismuth oxyiodide NM/TiO 2 Natural melanin-supported titanium dioxide Cr(VI)/MO Hexavalent chromium/methyl orange system * A. A. Jalil

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Section: Photocatalysismentioning

confidence: 99%

Section: Photocatalysismentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Simultaneous remediation of hexavalent chromium and organic pollutants in wastewater using period 4 transition metal oxide-based photocatalysts: a review

et al. 2021

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“…To remove Cr(VI) and organic compounds simultaneously, various strategies have been reported, including electrocatalysis, ,, photocatalysis, − and advanced redox method. − In an electrocatalytic process, simultaneous reduction of Cr(VI) and oxidation of organic contaminants could take place at the cathode and anode, respectively . Semiconductor photocatalytic systems (e.g., TiO 2 ) could produce reductive and oxidative species (electron–hole pair) simultaneously to achieve the removal of Cr(VI) and organic pollutants .…”

Section: Introductionmentioning

confidence: 99%

Synergistic Catalytic Organic Pollutants Degradation and Cr(VI) Reduction by Carbon Nanotubes through an Electron-Transfer Mechanism without External Energy or Chemical Input

Yang

et al. 2022

ACS EST Eng.

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Highly resistant organic pollutants and heavy metals (such as hexavalent chromium (Cr(VI)) usually coexist in industrial wastewater. However, efficient synergistic removal of them is still challenging in practical applications, due to low efficiency and high energy input required for this process. In this study, the metal-free multiwalled carbon nanotubes (MWCNTs) are demonstrated to simultaneously remove bisphenol A (BPA) and Cr(VI) without any external energy or chemical input. In this novel synergistic removal system, the catalytic performance is even higher than those of most of the reported metal-based catalysts in photo/electrocatalytic systems. The catalytic performances are negligibly affected by ions and humid acid, indicating applicability of the catalyst in actual wastewater. In addition, the MWCNT catalyst exhibits good recyclability after thermal treatment under inert atmosphere. Furthermore, the catalytic mechanism of this system has also been comprehensively investigated. This MWCNT-activated synergistic organic pollutants–Cr(VI) elimination system provides a novel and cost-effective strategy of “waste control by waste” for removing multiple industrial contaminants.

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“…In the last few years, there has been increased interest in using plasma technology to reduce water pollution [ 35 ]. Currently, researches on using this technology mostly concern removing organic compounds from water and wastewater, including dyes [ 36 , 37 ], pharmaceuticals [ 38 , 39 ], phenol [ 40 ], methylene blue [ 41 ], phosphorous compounds [ 42 ] and microbes [ 43 ]. Plasma technologies can also be used to oxidize inorganic pollutants, but the number of articles on this application is small [ 23 , 44 ].…”

Section: Introductionmentioning

confidence: 99%

Removal of Pb(II), Cd(II) and Ni(II) Ions from Groundwater by Nonthermal Plasma

et al. 2022

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The removal of Pb(II), Cd(II) and Ni(II) ions from aqueous solutions by means of nonthermal plasma with a dielectric barrier discharge is investigated. Aqueous solutions with metal ion concentrations from 10 to 100 mg/dm3 in spring water were used. In the first stage, the optimization of the solution flow rate, generator modulation frequency and duty cycle was made in terms of the removal efficiency of the considered metals. The removal was then investigated as a function of the number of passes of the solution through the cold plasma reactor. The effect of the initial concentration of ions in the solution was studied. Techniques such as composite central design, least squares method and Fourier transform infrared spectroscopy were used. The physical and chemical parameters of the solutions, such as electrical conductivity, pH, temperature, concentration of metal ions and the content of other substances (e.g., total organic carbon), were measured, and the presence of microorganisms was also examined. It was found that each pass of the solution through the cold plasma reactor causes a decrease in the concentration of Cd(II) and Ni(II); the concentration of Pb(II) drops rapidly after one pass, but further passes do not improve its removal. The removal percentage was 88% for Cd(II) after six passes and 72% for Pb(II) after one pass, whereas 19% for Ni(II). The purification mechanism corresponds to the precipitation of metal ions due to the increasing pH of the solution after exposure to cold plasma.

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Preparation of CoFe2O4/MWNTs/sponge electrode to enhance dielectric barrier plasma discharge for degradation of phenylic pollutants and Cr(VI) reduction

Cited by 38 publications

References 71 publications

Simultaneous remediation of hexavalent chromium and organic pollutants in wastewater using period 4 transition metal oxide-based photocatalysts: a review

Simultaneous remediation of hexavalent chromium and organic pollutants in wastewater using period 4 transition metal oxide-based photocatalysts: a review

Synergistic Catalytic Organic Pollutants Degradation and Cr(VI) Reduction by Carbon Nanotubes through an Electron-Transfer Mechanism without External Energy or Chemical Input

Removal of Pb(II), Cd(II) and Ni(II) Ions from Groundwater by Nonthermal Plasma

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