Synergy of combined adsorption and electrochemical degradation of aqueous organics by granular activated carbon particulate electrodes

Nikoline Loklindt Pedersen, Mahdi Nikbakht Fini, Peter Krisztian Molnar, Jens Muff

Publikation: Bidrag til tidsskriftTidsskriftartikelForskningpeer review

3 Citationer (Scopus)

Resumé

Electrochemical oxidation (EO) and activated carbon (AC) adsorption are, despite difference in maturation and market dissemination, both well-proven water treatment principles for the abatement of micropollutants. Both technologies suffer some drawbacks as mass transfer limitations (in case of EO) and poor adsorption affinity of some compounds (in case of AC). Granular active carbon may, when placed within an electric field, be polarized generating particulate reactive microelectrodes in bulk solution increasing the overall active electrode area, a concept known as 3D electrochemistry. In this paper, a potential synergy by combining EO and AC was studied in a potentiostatic batch setup at different applied electric field strengths (25–500 V/m), using boron-doped diamond (BDD) as active anode and the hydroxyl radical probe compound p-nitrosodimethylaniline (RNO) and the groundwater contaminants 2-methyl-4-chlorophenoxy acetic acid (MCPA), 2-methyl-4-chlorophenoxy propionic acid (MCPP or mecoprop) and 2,6-benzamide (BAM) as target model contaminants. Synergy was assessed based on comparison of the 3D process with removal kinetics in conventional 2D electrochemical process and pure AC adsorption. In demineralized water model solutions, synergies of 121–126% was found for RNO, MCPA and MCPA at 375 V/m electric field strength and w/w AC:organic ratio of 5:1. For BAM, the synergy was 192%, primarily due to stronger AC adsorption affinity. The study showed interesting perspectives of this treatment concept that needs to be pursued and studied in matrices of higher complexity.

OriginalsprogEngelsk
TidsskriftSeparation and Purification Technology
Vol/bind208
Sider (fra-til)51-58
Antal sider8
ISSN1383-5866
DOI
StatusUdgivet - 8 jan. 2019

Fingerprint

Activated carbon
Adsorption
Degradation
Electrodes
Electrochemical oxidation
Acetic acid
Electric fields
Impurities
Propionic acid
Diamond
Boron
Microelectrodes
Electrochemistry
Water treatment
Hydroxyl Radical
Groundwater
Diamonds
Anodes
Carbon
Mass transfer

Citer dette

@article{04465f7358b045e98d8623736d0279cc,
title = "Synergy of combined adsorption and electrochemical degradation of aqueous organics by granular activated carbon particulate electrodes",
abstract = "Electrochemical oxidation (EO) and activated carbon (AC) adsorption are, despite difference in maturation and market dissemination, both well-proven water treatment principles for the abatement of micropollutants. Both technologies suffer some drawbacks as mass transfer limitations (in case of EO) and poor adsorption affinity of some compounds (in case of AC). Granular active carbon may, when placed within an electric field, be polarized generating particulate reactive microelectrodes in bulk solution increasing the overall active electrode area, a concept known as 3D electrochemistry. In this paper, a potential synergy by combining EO and AC was studied in a potentiostatic batch setup at different applied electric field strengths (25–500 V/m), using boron-doped diamond (BDD) as active anode and the hydroxyl radical probe compound p-nitrosodimethylaniline (RNO) and the groundwater contaminants 2-methyl-4-chlorophenoxy acetic acid (MCPA), 2-methyl-4-chlorophenoxy propionic acid (MCPP or mecoprop) and 2,6-benzamide (BAM) as target model contaminants. Synergy was assessed based on comparison of the 3D process with removal kinetics in conventional 2D electrochemical process and pure AC adsorption. In demineralized water model solutions, synergies of 121–126{\%} was found for RNO, MCPA and MCPA at 375 V/m electric field strength and w/w AC:organic ratio of 5:1. For BAM, the synergy was 192{\%}, primarily due to stronger AC adsorption affinity. The study showed interesting perspectives of this treatment concept that needs to be pursued and studied in matrices of higher complexity.",
keywords = "3D electrochemistry, Electrochemical oxidation, Granular activated carbon (GAC), Particulate electrodes, Pesticides (MCPA, MCPP, BAM)",
author = "Pedersen, {Nikoline Loklindt} and {Nikbakht Fini}, Mahdi and Molnar, {Peter Krisztian} and Jens Muff",
year = "2019",
month = "1",
day = "8",
doi = "10.1016/j.seppur.2018.05.023",
language = "English",
volume = "208",
pages = "51--58",
journal = "Separation and Purification Technology",
issn = "1383-5866",
publisher = "Pergamon Press",

}

Synergy of combined adsorption and electrochemical degradation of aqueous organics by granular activated carbon particulate electrodes. / Pedersen, Nikoline Loklindt; Nikbakht Fini, Mahdi ; Molnar, Peter Krisztian; Muff, Jens.

I: Separation and Purification Technology, Bind 208, 08.01.2019, s. 51-58.

Publikation: Bidrag til tidsskriftTidsskriftartikelForskningpeer review

TY - JOUR

T1 - Synergy of combined adsorption and electrochemical degradation of aqueous organics by granular activated carbon particulate electrodes

AU - Pedersen, Nikoline Loklindt

AU - Nikbakht Fini, Mahdi

AU - Molnar, Peter Krisztian

AU - Muff, Jens

PY - 2019/1/8

Y1 - 2019/1/8

N2 - Electrochemical oxidation (EO) and activated carbon (AC) adsorption are, despite difference in maturation and market dissemination, both well-proven water treatment principles for the abatement of micropollutants. Both technologies suffer some drawbacks as mass transfer limitations (in case of EO) and poor adsorption affinity of some compounds (in case of AC). Granular active carbon may, when placed within an electric field, be polarized generating particulate reactive microelectrodes in bulk solution increasing the overall active electrode area, a concept known as 3D electrochemistry. In this paper, a potential synergy by combining EO and AC was studied in a potentiostatic batch setup at different applied electric field strengths (25–500 V/m), using boron-doped diamond (BDD) as active anode and the hydroxyl radical probe compound p-nitrosodimethylaniline (RNO) and the groundwater contaminants 2-methyl-4-chlorophenoxy acetic acid (MCPA), 2-methyl-4-chlorophenoxy propionic acid (MCPP or mecoprop) and 2,6-benzamide (BAM) as target model contaminants. Synergy was assessed based on comparison of the 3D process with removal kinetics in conventional 2D electrochemical process and pure AC adsorption. In demineralized water model solutions, synergies of 121–126% was found for RNO, MCPA and MCPA at 375 V/m electric field strength and w/w AC:organic ratio of 5:1. For BAM, the synergy was 192%, primarily due to stronger AC adsorption affinity. The study showed interesting perspectives of this treatment concept that needs to be pursued and studied in matrices of higher complexity.

AB - Electrochemical oxidation (EO) and activated carbon (AC) adsorption are, despite difference in maturation and market dissemination, both well-proven water treatment principles for the abatement of micropollutants. Both technologies suffer some drawbacks as mass transfer limitations (in case of EO) and poor adsorption affinity of some compounds (in case of AC). Granular active carbon may, when placed within an electric field, be polarized generating particulate reactive microelectrodes in bulk solution increasing the overall active electrode area, a concept known as 3D electrochemistry. In this paper, a potential synergy by combining EO and AC was studied in a potentiostatic batch setup at different applied electric field strengths (25–500 V/m), using boron-doped diamond (BDD) as active anode and the hydroxyl radical probe compound p-nitrosodimethylaniline (RNO) and the groundwater contaminants 2-methyl-4-chlorophenoxy acetic acid (MCPA), 2-methyl-4-chlorophenoxy propionic acid (MCPP or mecoprop) and 2,6-benzamide (BAM) as target model contaminants. Synergy was assessed based on comparison of the 3D process with removal kinetics in conventional 2D electrochemical process and pure AC adsorption. In demineralized water model solutions, synergies of 121–126% was found for RNO, MCPA and MCPA at 375 V/m electric field strength and w/w AC:organic ratio of 5:1. For BAM, the synergy was 192%, primarily due to stronger AC adsorption affinity. The study showed interesting perspectives of this treatment concept that needs to be pursued and studied in matrices of higher complexity.

KW - 3D electrochemistry

KW - Electrochemical oxidation

KW - Granular activated carbon (GAC)

KW - Particulate electrodes

KW - Pesticides (MCPA, MCPP, BAM)

UR - http://www.scopus.com/inward/record.url?scp=85046879474&partnerID=8YFLogxK

U2 - 10.1016/j.seppur.2018.05.023

DO - 10.1016/j.seppur.2018.05.023

M3 - Journal article

VL - 208

SP - 51

EP - 58

JO - Separation and Purification Technology

JF - Separation and Purification Technology

SN - 1383-5866

ER -