Photochemical and heterogeneous photocatalytic degradation of waste vinylsulphone dyes: A case study with hydrolyzed Reactive Black 5

Idil Arslan Alaton; Işil Akmehmet Balcioglu

doi:10.1016/S1010-6030(01)00440-3

Photochemical and heterogeneous photocatalytic degradation of waste vinylsulphone dyes: A case study with hydrolyzed Reactive Black 5

Idil Arslan Alaton, Işil Akmehmet Balcioglu

Bogazici University

Research output: Contribution to journal › Article › peer-review

140 Citations (Scopus)

Abstract

Aqueous solutions of hydrolyzed Reactive Black 5 (RB5) dye, a well-known surrogate for non-biodegradable azo dyes, were photochemically and photocatalytically treated by employing the H₂O₂/UV-C and TiO₂/UV-A advanced oxidation systems, respectively. The observed effects of reaction pH, oxidant dose and initial dyestuff concentration were used to explain the OH· induced color disappearance kinetics empirically. Accordingly, the waste dyestuff solutions could be completely decolorized (k_{d, max}=0.155min^-1; H₂O₂/UV-C system) and effectively mineralized (k_{TOC, max}=0.01min^-1; H₂O₂/UV-C system), with an average overall TOC removal of 78% after 120min advanced oxidation at the specified optimized reaction conditions. The treatment via H₂O₂/UV-C was mainly governed by OH· type oxidation rather than direct UV-C or UV-A photolysis, and the bleaching effect of the TiO₂/UV-A process could be successfully fitted to the empirical Langmuir-Hinshelwood (L-H) kinetic model (k_L-H=4.47mgl^-1min^-1; K_L-H=2.01lmg^-1).

Original language	English
Pages (from-to)	247-254
Number of pages	8
Journal	Journal of Photochemistry and Photobiology A: Chemistry
Volume	141
Issue number	2-3
DOIs	https://doi.org/10.1016/S1010-6030(01)00440-3
Publication status	Published - 2 Jul 2001
Externally published	Yes

Keywords

Advanced oxidation processes (AOPs)
HO/UV-C treatment
Langmuir-Hinshelwood type kinetic equation
Reactive Black 5
Textile dyestuffs
TiO/UV-A treatment

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10.1016/S1010-6030(01)00440-3

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title = "Photochemical and heterogeneous photocatalytic degradation of waste vinylsulphone dyes: A case study with hydrolyzed Reactive Black 5",

abstract = "Aqueous solutions of hydrolyzed Reactive Black 5 (RB5) dye, a well-known surrogate for non-biodegradable azo dyes, were photochemically and photocatalytically treated by employing the H2O2/UV-C and TiO2/UV-A advanced oxidation systems, respectively. The observed effects of reaction pH, oxidant dose and initial dyestuff concentration were used to explain the OH· induced color disappearance kinetics empirically. Accordingly, the waste dyestuff solutions could be completely decolorized (kd, max=0.155min-1; H2O2/UV-C system) and effectively mineralized (kTOC, max=0.01min-1; H2O2/UV-C system), with an average overall TOC removal of 78% after 120min advanced oxidation at the specified optimized reaction conditions. The treatment via H2O2/UV-C was mainly governed by OH· type oxidation rather than direct UV-C or UV-A photolysis, and the bleaching effect of the TiO2/UV-A process could be successfully fitted to the empirical Langmuir-Hinshelwood (L-H) kinetic model (kL-H=4.47mgl-1min-1; KL-H=2.01lmg-1).",

keywords = "Advanced oxidation processes (AOPs), HO/UV-C treatment, Langmuir-Hinshelwood type kinetic equation, Reactive Black 5, Textile dyestuffs, TiO/UV-A treatment",

author = "Alaton, {Idil Arslan} and Balcioglu, {I{\c s}il Akmehmet}",

year = "2001",

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doi = "10.1016/S1010-6030(01)00440-3",

language = "English",

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pages = "247--254",

journal = "Journal of Photochemistry and Photobiology A: Chemistry",

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TY - JOUR

T1 - Photochemical and heterogeneous photocatalytic degradation of waste vinylsulphone dyes

T2 - A case study with hydrolyzed Reactive Black 5

AU - Alaton, Idil Arslan

AU - Balcioglu, Işil Akmehmet

PY - 2001/7/2

Y1 - 2001/7/2

N2 - Aqueous solutions of hydrolyzed Reactive Black 5 (RB5) dye, a well-known surrogate for non-biodegradable azo dyes, were photochemically and photocatalytically treated by employing the H2O2/UV-C and TiO2/UV-A advanced oxidation systems, respectively. The observed effects of reaction pH, oxidant dose and initial dyestuff concentration were used to explain the OH· induced color disappearance kinetics empirically. Accordingly, the waste dyestuff solutions could be completely decolorized (kd, max=0.155min-1; H2O2/UV-C system) and effectively mineralized (kTOC, max=0.01min-1; H2O2/UV-C system), with an average overall TOC removal of 78% after 120min advanced oxidation at the specified optimized reaction conditions. The treatment via H2O2/UV-C was mainly governed by OH· type oxidation rather than direct UV-C or UV-A photolysis, and the bleaching effect of the TiO2/UV-A process could be successfully fitted to the empirical Langmuir-Hinshelwood (L-H) kinetic model (kL-H=4.47mgl-1min-1; KL-H=2.01lmg-1).

AB - Aqueous solutions of hydrolyzed Reactive Black 5 (RB5) dye, a well-known surrogate for non-biodegradable azo dyes, were photochemically and photocatalytically treated by employing the H2O2/UV-C and TiO2/UV-A advanced oxidation systems, respectively. The observed effects of reaction pH, oxidant dose and initial dyestuff concentration were used to explain the OH· induced color disappearance kinetics empirically. Accordingly, the waste dyestuff solutions could be completely decolorized (kd, max=0.155min-1; H2O2/UV-C system) and effectively mineralized (kTOC, max=0.01min-1; H2O2/UV-C system), with an average overall TOC removal of 78% after 120min advanced oxidation at the specified optimized reaction conditions. The treatment via H2O2/UV-C was mainly governed by OH· type oxidation rather than direct UV-C or UV-A photolysis, and the bleaching effect of the TiO2/UV-A process could be successfully fitted to the empirical Langmuir-Hinshelwood (L-H) kinetic model (kL-H=4.47mgl-1min-1; KL-H=2.01lmg-1).

KW - Advanced oxidation processes (AOPs)

KW - HO/UV-C treatment

KW - Langmuir-Hinshelwood type kinetic equation

KW - Reactive Black 5

KW - Textile dyestuffs

KW - TiO/UV-A treatment

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JO - Journal of Photochemistry and Photobiology A: Chemistry

JF - Journal of Photochemistry and Photobiology A: Chemistry

IS - 2-3

ER -

Photochemical and heterogeneous photocatalytic degradation of waste vinylsulphone dyes: A case study with hydrolyzed Reactive Black 5

Abstract

Keywords

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