Adsorbability Enhancement of Macroporous Resin by Dielectric Barrier Discharge Plasma Treatment to Phenol in Water

Tang, Shoufeng; Yuan, Deling; Jun, He

doi:10.1155/2016/6701828

Cited by 2 publications

(2 citation statements)

References 16 publications

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“…Phenol was used to study the effect of discharge conditions in the electric field on the amount of degradation. The results of Tang et al [56] and Zhang et al [23] showed higher removal of phenol at rising voltage level due to the correlation of the input energy accelerating free electrons and the number of active species produced. Also secondary physical effects such as ultraviolet light (UV) emission and shock waves might be stronger during the discharge process at higher applied voltages, further enhancing radical formation [23].…”

Section: Introductionmentioning

confidence: 95%

“…The AOP study by Pi et al [51] indicated that the degradation of para-Chlorobenzoic acid via free radical chain reactions indirectly promotes the O 3 decomposition via intermediately formed H 2 O 2 and its subsequent reactions. Many studies of AOP systems used phenol as an indicator substance [11,23,[52][53][54][55][56][57][58]. This aromatic substance can be degraded by both radical mechanisms and direct reaction with O 3 [54,55].…”

Section: Introductionmentioning

confidence: 99%

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Evaluating the Performance of a Lab-Scale Water Treatment Plant Using Non-Thermal Plasma Technology

Schönekerl¹,

Weigert

Uhlig³

et al. 2020

Water

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In this study, a lab-scale plant was designed to treat water in continuous flow condition using non-thermal plasma technology. The core was an electrode system with connected high-voltage (HV) pulse generator. Its potentials and limitations were investigated in different experimental series with regard to the high-voltage settings, additions of oxygen-based species, different volume flow rates, and various physical-chemical properties of the process water such as conductivity, pH value, and temperature. Indigo carmine, para-Chlorobenzoic acid, and phenol were chosen as reference substances. The best HV settings was found for the voltage amplitude Û = 30 kV, the pulse repetition rate f = 0.4–0.6 kHz, and the pulse duration tb = 500 ns with an energy yield for 50% degradation G50, which is of 41.8 g∙kWh−1 for indigo carmine, 0.32 g∙kWh−1 for para-Chlorobenzoic acid, and 1.04 g∙kWh−1 for phenol. By adding 1 × 10−3 mol∙L−1 of oxygen, a 50% increase in degradation was achieved for para-Chlorobenzoic acid. Conductivity is the key parameter for degradation efficiency with a negative exponential dependence. The most important species for degradation are hydroxyl radicals (c ≈ 1.4 × 10−8 mol∙L−1) and solvated electrons (c ≈ 1.4 × 10−8 mol∙L−1). The results show that the technology could be upgraded from the small-scale experiments described in the literature to a pilot plant level and has the potential to be used on a large scale for different applications.

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Section: Introductionmentioning

confidence: 95%