Document Detail


Continuous electrochemical treatment of phenolic wastewater in a tubular reactor.
MedLine Citation:
PMID:  12600378     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
The electrochemical treatment of phenolic wastewater in a continuous tubular reactor, constructed from a stainless steel tube with a cylindrical carbon anode at the centre, was investigated in this study, being first in literature. The effects of residence time on phenol removal was studied at 25 degrees C, 120 g l(-1) electrolyte concentration for 450 and 3100 mg l(-1) phenol feed concentrations with 61.4 and 54.7 mA cm(-2) current densities, respectively. The change in phenol concentration and pH of the reaction medium was monitored in every run and GC/MS analyses were performed to determine the fate of intermediate products formed during the electrochemical reaction in a specified batch run. During the electrolysis mono, di- and tri-substituted chlorinated phenol products were initially formed and consumed along with phenol thereafter mainly by polymerization mechanism. For 10 and 20 min of residence time phenol removal was 56% and 78%, respectively, with 450 mg l(-1) phenol feed concentration and above 40 min of residence time all phenol was consumed within the column. For 1, 1.5, 2 and 3h of residence time, phenol removal achieved was 42%, 71%, 81% and 98%, respectively, at 3100 mg l(-1) phenol feed concentration. It is noteworthy that more than 95% of the initial phenol was converted into a non-passivating polymer without hazardous end products in a comparatively fast and energy-efficient process, being a safe treatment.
Authors:
Bahadir K Körbahti; Abdurrahman Tanyolaç
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  Water research     Volume:  37     ISSN:  0043-1354     ISO Abbreviation:  Water Res.     Publication Date:  2003 Apr 
Date Detail:
Created Date:  2003-02-25     Completed Date:  2003-06-18     Revised Date:  2006-11-15    
Medline Journal Info:
Nlm Unique ID:  0105072     Medline TA:  Water Res     Country:  England    
Other Details:
Languages:  eng     Pagination:  1505-14     Citation Subset:  IM    
Copyright Information:
Copyright 2002 Elsevier Science Ltd.
Affiliation:
Faculty of Engineering, Chemical Engineering Department, Hacettepe University, Beytepe 06532, Ankara, Turkey.
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MeSH Terms
Descriptor/Qualifier:
Disinfectants / chemistry*,  isolation & purification
Electrochemistry
Environmental Monitoring
Kinetics
Phenols / chemistry*,  isolation & purification
Polymers
Waste Disposal, Fluid
Water Pollutants, Chemical / isolation & purification*
Water Purification / methods*
Chemical
Reg. No./Substance:
0/Disinfectants; 0/Phenols; 0/Polymers; 0/Water Pollutants, Chemical

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine


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