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Electrochemical oxidation of Phenol –A Comparative Study Using Pulsed and Non-pulsed Techniques

Soma, Arpita
http://rave.ohiolink.edu/etdc/view?acc_num=ucin1267718359

Abstract Details

2009, MS, University of Cincinnati, Engineering : Environmental Engineering.
The electrochemical oxidation of phenol was studied using graphite and boron-doped diamond anodic electrodes in the presence of sodium chloride (NaCl). In electrochemical reactions in the presence of chloride, chloride ions are oxidized to chlorine gas at the anode followed by a rapid hydrolysis of the produced chlorine gas to hypochlorous acid, which further dissociates to generate hypochlorite. Chlorine, hypochlorous acid and hypochlorite are the active chlorine species that are responsible for oxidation of phenol. Literature indicates that the presence of NaCl catalyses the anodic oxidation of phenol at some electrodes. However, the continuous application of electric current can lead to the formation of excess hypochlorite ions in the reactor which may increase the rate of parasitic side reactions like formation of chlorate and other chlorinated compounds which may be more toxic than the original compounds in the waste stream.As part of the current study, the impact of controlled current supply on chlorate generation in the system and the analysis of the different products generated at boron doped diamond anode were undertaken. The indirect oxidation of 0.5 mM of phenol in the presence of 0.05 m NaCl was studied and the impact of duty cycle on chlorate formation in the reactor was investigated. Complete removal of phenol and oxidation intermediates was achieved using the boron doped diamond electrode. Chlorophenols were the only intermediates noticed. By pulsing the current supply to maintain a duty factor a 50%, the desired level of oxidation was achieved using lower amount of charge and reducing the chlorate generation in the reactor by approximately 47.5%.
Margaret Kupferle, PhD, PE (Committee Chair)
George Sorial, PhD (Committee Member)
Am Jang, PhD (Committee Member)
108 p.
Environmental Engineering
phenol; electrochemical oxidation; chlorate; boron doped diamond anode

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Citations

  • Soma, A. (2009). Electrochemical oxidation of Phenol –A Comparative Study Using Pulsed and Non-pulsed Techniques [Master's thesis, University of Cincinnati]. OhioLINK Electronic Theses and Dissertations Center. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1267718359

    APA Style (7th edition)

  • Soma, Arpita. Electrochemical oxidation of Phenol –A Comparative Study Using Pulsed and Non-pulsed Techniques. 2009. University of Cincinnati, Master's thesis. OhioLINK Electronic Theses and Dissertations Center, http://rave.ohiolink.edu/etdc/view?acc_num=ucin1267718359.

    MLA Style (8th edition)

  • Soma, Arpita. "Electrochemical oxidation of Phenol –A Comparative Study Using Pulsed and Non-pulsed Techniques." Master's thesis, University of Cincinnati, 2009. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1267718359

    Chicago Manual of Style (17th edition)

ucin1267718359
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© 2009, all rights reserved.
This open access ETD is published by University of Cincinnati and OhioLINK.