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The application of exfoliated graphite electrode in the electrochemical degradation of p-nitrophenol in water
We report the application of exfoliated graphite (EG) as an electrode material in the electrochemical degradation of p-nitrophenol in water. Bulk electrolysis (degradation) of p-nitrophenol was carried out at a potential of 2.0 V (vs. Ag/AgCl) in the presence of 0.1 M Na 2 SO 4 supporting electrolyte, while UV-Vis spectrophotometry was used to monitor the degradation efficiency. An initial p-nitrophenol load concentration of 0.2 mM for 3 h electrolysis time was studied under the optimized conditions of pH 7, and 10 mAcm −2 current density. The electro-degradation reaction displayed a pseudo-first-order kinetic behavior with a rate constant (k r ) of 11×10 −3 min −1 . The removal efficiency was found to be 91.5%. Chromatography coupled with time of flight mass spectrometry revealed p-benzoquinone as a major intermediate product. These results demonstrate the potential and viability of electrochemical technology as an alternative approach to water treatment using a low cost graphite electrode.
The application of exfoliated graphite electrode in the electrochemical degradation of p-nitrophenol in water
We report the application of exfoliated graphite (EG) as an electrode material in the electrochemical degradation of p-nitrophenol in water. Bulk electrolysis (degradation) of p-nitrophenol was carried out at a potential of 2.0 V (vs. Ag/AgCl) in the presence of 0.1 M Na 2 SO 4 supporting electrolyte, while UV-Vis spectrophotometry was used to monitor the degradation efficiency. An initial p-nitrophenol load concentration of 0.2 mM for 3 h electrolysis time was studied under the optimized conditions of pH 7, and 10 mAcm −2 current density. The electro-degradation reaction displayed a pseudo-first-order kinetic behavior with a rate constant (k r ) of 11×10 −3 min −1 . The removal efficiency was found to be 91.5%. Chromatography coupled with time of flight mass spectrometry revealed p-benzoquinone as a major intermediate product. These results demonstrate the potential and viability of electrochemical technology as an alternative approach to water treatment using a low cost graphite electrode.
The application of exfoliated graphite electrode in the electrochemical degradation of p-nitrophenol in water
Ntsendwana, Bulelwa (Autor:in) / Peleyeju, Moses G / Arotiba, Omotayo A
2016
Aufsatz (Zeitschrift)
Englisch
USA , Recht , Zeitschrift , Datenverarbeitung
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