Kinetic analysis of acid orange 7 degradation by pulsed discharge plasma combined with activated carbon and the synergistic mechanism exploration

Guo, He; Wang, Huijuan; Wu, Qiangshun; Zhou, Guangshun; Yi, Chengwu

doi:10.1016/j.chemosphere.2016.05.092

Cited by 28 publications

(5 citation statements)

References 28 publications

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“…The AO7 degradation is also reported by Guo et al, showing the application of pulsed discharge plasma (PDP) combined with activated carbon (AC) [82]. The presence of AC in the PDP/AC system contributes to creating a synergistic effect, thanks to the adsorbent and catalytic action of the AC.…”

Section: Removal Of Dyesmentioning

confidence: 68%

“…Analyzing the data reported in this paper, it is in fact possible to note that the TOC removal was equal to about 27%. Since organic carbon is still present in the solution, it is evident that the oxidizing species promoted by the presence of AC are able to attack the azoic double bond (-N=N-) responsible for the color, but unable to destroy the aromatic rings generated during the AO7 degradation process [82]. This aspect should not be underestimated since by applying an advanced oxidation process, it is desirable to obtain the complete (or almost) mineralization of the organic substance present in the solution.…”

Section: Removal Of Dyesmentioning

confidence: 99%

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Non-Thermal Plasma Coupled with Catalyst for the Degradation of Water Pollutants: A Review

et al. 2020

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Non-thermal plasma is one of the most promising technologies used for the degradation of hazardous pollutants in wastewater. Recent studies evidenced that various operating parameters influence the yield of the Non-Thermal Plasma (NTP)-based processes. In particular, the presence of a catalyst, suitably placed in the NTP reactor, induces a significant increase in process performance with respect to NTP alone. For this purpose, several researchers have studied the ability of NTP coupled to catalysts for the removal of different kind of pollutants in aqueous solution. It is clear that it is still complicated to define an optimal condition that can be suitable for all types of contaminants as well as for the various types of catalysts used in this context. However, it was highlighted that the operational parameters play a fundamental role. However, it is often difficult to understand the effect that plasma can induce on the catalyst and on the production of the oxidizing species most responsible for the degradation of contaminants. For this reason, the aim of this review is to summarize catalytic formulations coupled with non-thermal plasma technology for water pollutants removal. In particular, the reactor configuration to be adopted when NTP was coupled with a catalyst was presented, as well as the position of the catalyst in the reactor and the role of the main oxidizing species. Furthermore, in this review, a comparison in terms of degradation and mineralization efficiency was made for the different cases studied.

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Section: Removal Of Dyesmentioning

confidence: 68%

Section: Removal Of Dyesmentioning

confidence: 99%

Non-Thermal Plasma Coupled with Catalyst for the Degradation of Water Pollutants: A Review

et al. 2020

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“…Where η is the removal efficiency of MG, %; C MG is the initial concentration, mg/L; C t is the concentration of MG at t min, mg/L. Kinetic analysis of MG degradation was analyzed based on the pseudo-first-order kinetic model [15]:…”

Section: Methodsmentioning

confidence: 99%

Synergistic degradation of malachite green by water surface plasma combined with Fe²⁺/PMS

Hua

Kang

Liu

2023

IOP Conf. Ser.: Earth Environ. Sci.

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Water surface plasma (WSP) discharge technology coupling with Fe2+ and peroxymonosulfate (PMS) was investigated for the degradation of malachite green (MG) dye wastewater. The effects of Fe2+ dosage, PMS dosage, input voltage and solution initial conductivity on the degradation of MG were investigated. When the Fe2+ dosage was 125 μM, PMS dosage was 0.5 mM and input voltage was 16 kV, the degradation performance and reaction rate of MG reached 96.3% and 0.219 min−1 within the discharge time of 15 min. When increasing the initial conductivity from 31.1 μS/cm to 1000 μS/cm, degradation efficiency of MG decreased from 97.9% to 94.1% with the decrease of only 3.8% and degradation rate declined by only 0.074 min−1.

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“…In the past, advanced oxidation processes (AOPs) have been proved to be innovative solutions for the emerging biorefractory organic compounds in waste water, and degradation of the pollutants is largely due to the high oxidative capacity of the hydroxyl radical (•OH, 2.8 V) produced in the AOPs [6,7]. Among all available AOPs, the technology of non-thermal plasma (NTP) has shown great potential, as it has the superior advantage of forming the chemical and physical effects simultaneously in one reaction system [8][9][10][11][12][13][14][15]. The chemical effects primarily mean the oxidization of types of active species in the reaction system, including…”

Section: Introductionmentioning

confidence: 99%

Analysis of the critical active species for methylene blue decoloration in a dielectric barrier discharge plasma system

Wang

Mao

Cao

et al. 2020

Plasma Sci. Technol.

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In the paper, a hybrid gas-liquid dielectric barrier discharge (DBD) plasma system was set up to treat a methylene blue (MB) solution. The effects of the change of the carrier gas, the gas bubbling rate and different kinds of scavenger addition, including sodium carbonate (Na 2 CO 3 ), para benzoquinone (p-BQ), triethylenediamine and sodium dihydrogen phosphate (NaH 2 PO 4 ), on the MB decoloration were reviewed to clarify the critical active species for the dye decoloration in the DBD plasma system. The obtained results show that higher decoloration of the MB solution could be achieved when O 2 was used as the carrier gas, which could be 100% after 20 min discharge treatment, and the result confirmed the crucial effect of O 3 in the MB decoloration. Based on the experiments of the scavenger addition, it could be concluded that O 2 • − and 1 O 2 were two other important reactive oxygen species (ROS) for the MB decoloration. The results of the higher chemical oxygen demand removal and faster disappearance of the characteristic peak of the MB from the UV-vis analysis under O 2 bubbling conditions also proved the critical effect of the ROS formed by O 2 on the MB decoloration.

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Kinetic analysis of acid orange 7 degradation by pulsed discharge plasma combined with activated carbon and the synergistic mechanism exploration

Cited by 28 publications

References 28 publications

Non-Thermal Plasma Coupled with Catalyst for the Degradation of Water Pollutants: A Review

Non-Thermal Plasma Coupled with Catalyst for the Degradation of Water Pollutants: A Review

Synergistic degradation of malachite green by water surface plasma combined with Fe²⁺/PMS

Analysis of the critical active species for methylene blue decoloration in a dielectric barrier discharge plasma system

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Kinetic analysis of acid orange 7 degradation by pulsed discharge plasma combined with activated carbon and the synergistic mechanism exploration

Cited by 28 publications

References 28 publications

Non-Thermal Plasma Coupled with Catalyst for the Degradation of Water Pollutants: A Review

Non-Thermal Plasma Coupled with Catalyst for the Degradation of Water Pollutants: A Review

Synergistic degradation of malachite green by water surface plasma combined with Fe2+/PMS

Analysis of the critical active species for methylene blue decoloration in a dielectric barrier discharge plasma system

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Product

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Synergistic degradation of malachite green by water surface plasma combined with Fe²⁺/PMS