Pseudo first order kinetics and proposed transformation products pathway for the degradation of diclofenac using graphite-PVC composite as anode

Zainab Haider Mussa, Fouad Fadhil Al-Qaim, Mohamed Rozali Othman, Md. Pauzi Abdullah, Jalifah Latip, Zuriati Zakria

Research output: Contribution to journalArticle

12 Citations (Scopus)

Abstract

The electrochemical degradation kinetics of diclofenac (DCF) using graphite-PVC composite as anode was assessed in pure water and effluent wastewater. Effects of initial concentration of diclofenac, chloride ion (Cl-) loading, type of sample and applied voltage were determined to test and validate a kinetic model for the oxidation of diclofenac by the electrochemical oxidation process. The results revealed that the electrochemical oxidation rates of diclofenac followed pseudo first-order kinetics. The rate constant values ranged from 0.018 to 0.173 /min, depending on the operating parameters. However, 6V and 4g/L NaCl were selected for further experiments (96.9% removal of diclofenac and 0.0078kWh/g diclofenac consumption energy) after 30min and at 20mg/L of diclofenac. High consumption energy (0.0303kWh/g diclofenac) was accompanied with high applied voltage of 10V so it was not considered in this study.Liquid chromatography time-of-flight mass spectrometry (LC-ToF/MS) was used for the elucidation of the main transformation products (TPs) which are resulted from the degradation of diclofenac (DCF) during the application of graphite-PVC composite as anode in aqueous matrices. The toxicity of DCF and its TPs was assessed against E. coli bacteria at different incubation time.

Original languageEnglish
JournalJournal of the Taiwan Institute of Chemical Engineers
DOIs
Publication statusAccepted/In press - 18 Jul 2016

Fingerprint

Graphite
Diclofenac
Polyvinyl Chloride
Polyvinyl chlorides
Anodes
Electrochemical oxidation
Degradation
Kinetics
Composite materials
Energy utilization
Liquid chromatography
Electric potential
Escherichia coli
Mass spectrometry
Toxicity
Effluents
Rate constants
Bacteria
Wastewater
Oxidation

Keywords

  • Diclofenac
  • E. coli bacteria
  • Electrochemical degradation
  • Kinetics
  • ToF/MS
  • Transformation products

ASJC Scopus subject areas

  • Chemistry(all)
  • Chemical Engineering(all)

Cite this

Pseudo first order kinetics and proposed transformation products pathway for the degradation of diclofenac using graphite-PVC composite as anode. / Mussa, Zainab Haider; Al-Qaim, Fouad Fadhil; Othman, Mohamed Rozali; Abdullah, Md. Pauzi; Latip, Jalifah; Zakria, Zuriati.

In: Journal of the Taiwan Institute of Chemical Engineers, 18.07.2016.

Research output: Contribution to journalArticle

@article{b230b31791ba445fbb12f7222b016096,
title = "Pseudo first order kinetics and proposed transformation products pathway for the degradation of diclofenac using graphite-PVC composite as anode",
abstract = "The electrochemical degradation kinetics of diclofenac (DCF) using graphite-PVC composite as anode was assessed in pure water and effluent wastewater. Effects of initial concentration of diclofenac, chloride ion (Cl-) loading, type of sample and applied voltage were determined to test and validate a kinetic model for the oxidation of diclofenac by the electrochemical oxidation process. The results revealed that the electrochemical oxidation rates of diclofenac followed pseudo first-order kinetics. The rate constant values ranged from 0.018 to 0.173 /min, depending on the operating parameters. However, 6V and 4g/L NaCl were selected for further experiments (96.9{\%} removal of diclofenac and 0.0078kWh/g diclofenac consumption energy) after 30min and at 20mg/L of diclofenac. High consumption energy (0.0303kWh/g diclofenac) was accompanied with high applied voltage of 10V so it was not considered in this study.Liquid chromatography time-of-flight mass spectrometry (LC-ToF/MS) was used for the elucidation of the main transformation products (TPs) which are resulted from the degradation of diclofenac (DCF) during the application of graphite-PVC composite as anode in aqueous matrices. The toxicity of DCF and its TPs was assessed against E. coli bacteria at different incubation time.",
keywords = "Diclofenac, E. coli bacteria, Electrochemical degradation, Kinetics, ToF/MS, Transformation products",
author = "Mussa, {Zainab Haider} and Al-Qaim, {Fouad Fadhil} and Othman, {Mohamed Rozali} and Abdullah, {Md. Pauzi} and Jalifah Latip and Zuriati Zakria",
year = "2016",
month = "7",
day = "18",
doi = "10.1016/j.jtice.2016.12.031",
language = "English",
journal = "Journal of the Taiwan Institute of Chemical Engineers",
issn = "1876-1070",
publisher = "Taiwan Institute of Chemical Engineers",

}

TY - JOUR

T1 - Pseudo first order kinetics and proposed transformation products pathway for the degradation of diclofenac using graphite-PVC composite as anode

AU - Mussa, Zainab Haider

AU - Al-Qaim, Fouad Fadhil

AU - Othman, Mohamed Rozali

AU - Abdullah, Md. Pauzi

AU - Latip, Jalifah

AU - Zakria, Zuriati

PY - 2016/7/18

Y1 - 2016/7/18

N2 - The electrochemical degradation kinetics of diclofenac (DCF) using graphite-PVC composite as anode was assessed in pure water and effluent wastewater. Effects of initial concentration of diclofenac, chloride ion (Cl-) loading, type of sample and applied voltage were determined to test and validate a kinetic model for the oxidation of diclofenac by the electrochemical oxidation process. The results revealed that the electrochemical oxidation rates of diclofenac followed pseudo first-order kinetics. The rate constant values ranged from 0.018 to 0.173 /min, depending on the operating parameters. However, 6V and 4g/L NaCl were selected for further experiments (96.9% removal of diclofenac and 0.0078kWh/g diclofenac consumption energy) after 30min and at 20mg/L of diclofenac. High consumption energy (0.0303kWh/g diclofenac) was accompanied with high applied voltage of 10V so it was not considered in this study.Liquid chromatography time-of-flight mass spectrometry (LC-ToF/MS) was used for the elucidation of the main transformation products (TPs) which are resulted from the degradation of diclofenac (DCF) during the application of graphite-PVC composite as anode in aqueous matrices. The toxicity of DCF and its TPs was assessed against E. coli bacteria at different incubation time.

AB - The electrochemical degradation kinetics of diclofenac (DCF) using graphite-PVC composite as anode was assessed in pure water and effluent wastewater. Effects of initial concentration of diclofenac, chloride ion (Cl-) loading, type of sample and applied voltage were determined to test and validate a kinetic model for the oxidation of diclofenac by the electrochemical oxidation process. The results revealed that the electrochemical oxidation rates of diclofenac followed pseudo first-order kinetics. The rate constant values ranged from 0.018 to 0.173 /min, depending on the operating parameters. However, 6V and 4g/L NaCl were selected for further experiments (96.9% removal of diclofenac and 0.0078kWh/g diclofenac consumption energy) after 30min and at 20mg/L of diclofenac. High consumption energy (0.0303kWh/g diclofenac) was accompanied with high applied voltage of 10V so it was not considered in this study.Liquid chromatography time-of-flight mass spectrometry (LC-ToF/MS) was used for the elucidation of the main transformation products (TPs) which are resulted from the degradation of diclofenac (DCF) during the application of graphite-PVC composite as anode in aqueous matrices. The toxicity of DCF and its TPs was assessed against E. coli bacteria at different incubation time.

KW - Diclofenac

KW - E. coli bacteria

KW - Electrochemical degradation

KW - Kinetics

KW - ToF/MS

KW - Transformation products

UR - http://www.scopus.com/inward/record.url?scp=85012937881&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=85012937881&partnerID=8YFLogxK

U2 - 10.1016/j.jtice.2016.12.031

DO - 10.1016/j.jtice.2016.12.031

M3 - Article

AN - SCOPUS:85012937881

JO - Journal of the Taiwan Institute of Chemical Engineers

JF - Journal of the Taiwan Institute of Chemical Engineers

SN - 1876-1070

ER -