Oxidation of chlorophenols in aqueous solution by excess potassium permanganate

Hossain, SMG; McLaughlan, RG

Oxidation of chlorophenols in aqueous solution by excess potassium permanganate

Hossain, SMG McLaughlan, RG

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Publication Type:: Journal Article
Citation:: Water, Air, and Soil Pollution, 2012, 223 (3), pp. 1429 - 1435
Issue Date:: 2012-03-01

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Field	Value	Language
dc.contributor.author	Hossain, SMG	en_US
dc.contributor.author	McLaughlan, RG https://orcid.org/0000-0001-9796-0988	en_US
dc.date.issued	2012-03-01	en_US
dc.identifier.citation	Water, Air, and Soil Pollution, 2012, 223 (3), pp. 1429 - 1435	en_US
dc.identifier.issn	0049-6979	en_US
dc.identifier.uri	http://hdl.handle.net/10453/31442
dc.description.abstract	A simple spectrophotometric method was developed to quantify chlorophenol (CP) concentrations after reaction with potassium permanganate and quenching with sodium sulfite. Other quenching agents (peroxide, sodium thiosulfate and hydroxylamine hydrochloride) were found to create absorbance in the spectral range required for CP quantification. Analysis at pH 12 gave greater absorption and sensitivity for the method compared with pH 5.6. The calibration curves of the proposed methods were linear in the concentration ranges 0.0061-0.61 and 0.0078-0.78 mM with detection limit of 0.0006 and 0.0008 mM for dichlorophenols and monochlorophenols, respectively. The oxidation kinetics of five chlorophenols in aqueous solution with excess potassium permanganate were evaluated using the analytical method. The pseudo-first-order reaction rates were found to be relatively rapid 1.42×10 -3 to 0.024 s -1 and followed the sequence 2-chlorophenol (2-CP)>2,6- dichlorophenol (2,6-DCP)>4-chlorophenol (4-CP)>2,4-dichlorophenol (2, 4-DCP)>3-chlorophenol (3-CP). The apparent second-order rate constant was calculated from the measured pseudo-first-order rate constant with respect to CP with initial KMnO 4 concentration (1.5 mM) and follows the same sequence of pseudo-first-order rate constant. This shows that chlorine atoms in the structure of chlorophenol had a significant influence on the oxidation of chlorophenols by potassium permanganate. Permanganate can be used for the treatment of chlorophenol-contaminated soil and groundwater. © Springer Science+Business Media B.V. 2011.	en_US
dc.relation.ispartof	Water, Air, and Soil Pollution	en_US
dc.relation.isbasedon	10.1007/s11270-011-0955-x	en_US
dc.subject.classification	Environmental Sciences	en_US
dc.title	Oxidation of chlorophenols in aqueous solution by excess potassium permanganate	en_US
dc.type	Journal Article
utslib.citation.volume	3	en_US
utslib.citation.volume	223	en_US
utslib.for	0904 Chemical Engineering	en_US
pubs.embargo.period	Not known	en_US
pubs.organisational-group	/University of Technology Sydney
pubs.organisational-group	/University of Technology Sydney/Faculty of Engineering and Information Technology
pubs.organisational-group	/University of Technology Sydney/Faculty of Engineering and Information Technology/School of Civil and Environmental Engineering
pubs.organisational-group	/University of Technology Sydney/Strength - CTWW - Centre for Technology in Water and Wastewater Treatment
utslib.copyright.status	closed_access
pubs.issue	3	en_US
pubs.publication-status	Published	en_US
pubs.volume	223	en_US

Abstract:

A simple spectrophotometric method was developed to quantify chlorophenol (CP) concentrations after reaction with potassium permanganate and quenching with sodium sulfite. Other quenching agents (peroxide, sodium thiosulfate and hydroxylamine hydrochloride) were found to create absorbance in the spectral range required for CP quantification. Analysis at pH 12 gave greater absorption and sensitivity for the method compared with pH 5.6. The calibration curves of the proposed methods were linear in the concentration ranges 0.0061-0.61 and 0.0078-0.78 mM with detection limit of 0.0006 and 0.0008 mM for dichlorophenols and monochlorophenols, respectively. The oxidation kinetics of five chlorophenols in aqueous solution with excess potassium permanganate were evaluated using the analytical method. The pseudo-first-order reaction rates were found to be relatively rapid 1.42×10 -3 to 0.024 s -1 and followed the sequence 2-chlorophenol (2-CP)>2,6- dichlorophenol (2,6-DCP)>4-chlorophenol (4-CP)>2,4-dichlorophenol (2, 4-DCP)>3-chlorophenol (3-CP). The apparent second-order rate constant was calculated from the measured pseudo-first-order rate constant with respect to CP with initial KMnO 4 concentration (1.5 mM) and follows the same sequence of pseudo-first-order rate constant. This shows that chlorine atoms in the structure of chlorophenol had a significant influence on the oxidation of chlorophenols by potassium permanganate. Permanganate can be used for the treatment of chlorophenol-contaminated soil and groundwater. © Springer Science+Business Media B.V. 2011.

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http://hdl.handle.net/10453/31442