Factors affecting decolourization efficiency of indigo carmine in a coaxial surface plasma falling film reactor

TY - JOUR

T1 - Factors affecting decolourization efficiency of indigo carmine in a coaxial surface plasma falling film reactor

AU - Jabbariesgandani, Amirmohammad

AU - Walsh, James L.

N1 - Funding Information: This work was supported by the European Union's EU Framework Programme for Research and Innovation Horizon 2020 under Grant Agreement No. 861369 (innoveox.eu). Funding Information: This work was supported by the European Union 's EU Framework Programme for Research and Innovation Horizon 2020 under Grant Agreement No. 861369 (innoveox.eu). Publisher Copyright: © 2023 The Author(s)

PY - 2023/7/1

Y1 - 2023/7/1

N2 - Low temperature plasmas generated in close proximity to water offers a convenient means of generating highly oxidising aqueous phase chemical species capable of degrading recalcitrant organic compounds. To ensure the efficacy of the approach the interplay between the plasma excitation parameters and reactor characteristics must be optimised to facilitate efficient generation and transport of reactive chemical species from the plasma phase to the liquid. In this study, indigo carmine dye was used as a model contaminant to investigate factors affecting degradation efficacy in a coaxial falling film reactor coupled to a surface barrier discharge. Plasma generated species in the gas phase were characterised using Fourier transform infra-red spectroscopy and linked to aqueous phase species in the exposed solution. Parameters including dissipated power, pulse width modulation and reactor sealing conditions were systematically investigated to reveal a maximum decolourisation efficiency of 20.18 g/kWh. Through a comparison with other plasma-based and non-plasma-based advanced oxidation processes it was revealed that the coaxial surface barrier falling film reactor developed in this study is highly competitive and worthy of further investigation.

AB - Low temperature plasmas generated in close proximity to water offers a convenient means of generating highly oxidising aqueous phase chemical species capable of degrading recalcitrant organic compounds. To ensure the efficacy of the approach the interplay between the plasma excitation parameters and reactor characteristics must be optimised to facilitate efficient generation and transport of reactive chemical species from the plasma phase to the liquid. In this study, indigo carmine dye was used as a model contaminant to investigate factors affecting degradation efficacy in a coaxial falling film reactor coupled to a surface barrier discharge. Plasma generated species in the gas phase were characterised using Fourier transform infra-red spectroscopy and linked to aqueous phase species in the exposed solution. Parameters including dissipated power, pulse width modulation and reactor sealing conditions were systematically investigated to reveal a maximum decolourisation efficiency of 20.18 g/kWh. Through a comparison with other plasma-based and non-plasma-based advanced oxidation processes it was revealed that the coaxial surface barrier falling film reactor developed in this study is highly competitive and worthy of further investigation.

KW - Advanced oxidation processes

KW - Falling film reactor

KW - Indigo carmine

KW - Plasma activated water

UR - http://www.scopus.com/inward/record.url?scp=85150383722&partnerID=8YFLogxK

U2 - 10.1016/j.jwpe.2023.103632

DO - 10.1016/j.jwpe.2023.103632

M3 - Article

AN - SCOPUS:85150383722

SN - 2214-7144

VL - 53

JO - Journal of Water Process Engineering

JF - Journal of Water Process Engineering

M1 - 103632

ER -