Electrochemical oxidation of Phenol –A Comparative Study Using Pulsed and Non-pulsed Techniques
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University of Cincinnati / OhioLINK
2009
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| Online Access: | http://rave.ohiolink.edu/etdc/view?acc_num=ucin1267718359 |
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ndltd-OhioLink-oai-etd.ohiolink.edu-ucin12677183592021-08-03T06:13:52Z Electrochemical oxidation of Phenol –A Comparative Study Using Pulsed and Non-pulsed Techniques Soma, Arpita Environmental Engineering phenol electrochemical oxidation chlorate boron doped diamond anode 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%. 2009 English text University of Cincinnati / OhioLINK http://rave.ohiolink.edu/etdc/view?acc_num=ucin1267718359 http://rave.ohiolink.edu/etdc/view?acc_num=ucin1267718359 unrestricted This thesis or dissertation is protected by copyright: all rights reserved. It may not be copied or redistributed beyond the terms of applicable copyright laws. |
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NDLTD |
| language |
English |
| sources |
NDLTD |
| topic |
Environmental Engineering phenol electrochemical oxidation chlorate boron doped diamond anode |
| spellingShingle |
Environmental Engineering phenol electrochemical oxidation chlorate boron doped diamond anode Soma, Arpita Electrochemical oxidation of Phenol –A Comparative Study Using Pulsed and Non-pulsed Techniques |
| author |
Soma, Arpita |
| author_facet |
Soma, Arpita |
| author_sort |
Soma, Arpita |
| title |
Electrochemical oxidation of Phenol –A Comparative Study Using Pulsed and Non-pulsed Techniques |
| title_short |
Electrochemical oxidation of Phenol –A Comparative Study Using Pulsed and Non-pulsed Techniques |
| title_full |
Electrochemical oxidation of Phenol –A Comparative Study Using Pulsed and Non-pulsed Techniques |
| title_fullStr |
Electrochemical oxidation of Phenol –A Comparative Study Using Pulsed and Non-pulsed Techniques |
| title_full_unstemmed |
Electrochemical oxidation of Phenol –A Comparative Study Using Pulsed and Non-pulsed Techniques |
| title_sort |
electrochemical oxidation of phenol –a comparative study using pulsed and non-pulsed techniques |
| publisher |
University of Cincinnati / OhioLINK |
| publishDate |
2009 |
| url |
http://rave.ohiolink.edu/etdc/view?acc_num=ucin1267718359 |
| work_keys_str_mv |
AT somaarpita electrochemicaloxidationofphenolacomparativestudyusingpulsedandnonpulsedtechniques |
| _version_ |
1719433112355602432 |