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Assessment of Trihalomethane Formation in Chlorinated Raw Waters with Differential UV Spectroscopy Approach

In this study, the changes in UV absorbance of water samples were characterized using defined differential UV spectroscopy (DUV), a novel spectroscopic technique. Chlorination experiments were conducted with water samples from Terkos Lake (TL) and Büyükçekmece Lake (BL) (Istanbul, Turkey). The maxim...

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Autores principales: Özdemir, Kadir, Toröz, İsmail, Uyak, Vedat
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Hindawi Publishing Corporation 2013
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3865629/
https://www.ncbi.nlm.nih.gov/pubmed/24363624
http://dx.doi.org/10.1155/2013/890854
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author Özdemir, Kadir
Toröz, İsmail
Uyak, Vedat
author_facet Özdemir, Kadir
Toröz, İsmail
Uyak, Vedat
author_sort Özdemir, Kadir
collection PubMed
description In this study, the changes in UV absorbance of water samples were characterized using defined differential UV spectroscopy (DUV), a novel spectroscopic technique. Chlorination experiments were conducted with water samples from Terkos Lake (TL) and Büyükçekmece Lake (BL) (Istanbul, Turkey). The maximum loss of UV absorbance for chlorinated TL and BL raw water samples was observed at a wavelength of 272 nm. Interestingly, differential absorbance at 272 nm (ΔUV(272)) was shown to be a good indicator of UV absorbing chromophores and the formation of trihalomethanes (THMs) resulting from chlorination. Furthermore, differential spectra of chlorinated TL waters were similar for given chlorination conditions, peaking at 272 nm. The correlations between THMs and ΔUV(272) were quantified by linear equations with R (2) values >0.96. The concentration of THMs formed when natural organic matter is chlorinated increases with increasing time and pH levels. Among all THMs, CHCl(3) was the dominant species forming as a result of the chlorination of TL and BL raw water samples. The highest chloroform (CHCl(3)), dichlorobromomethane (CHCl(2)Br), and dibromochloromethane (CHBr(2)Cl) concentration were released per unit loss of absorbance at 272 nm at pH 9 with a maximum reaction time of 168 hours and Cl(2)/dissolved organic carbon ratio of 3.2.
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spelling pubmed-38656292013-12-22 Assessment of Trihalomethane Formation in Chlorinated Raw Waters with Differential UV Spectroscopy Approach Özdemir, Kadir Toröz, İsmail Uyak, Vedat ScientificWorldJournal Research Article In this study, the changes in UV absorbance of water samples were characterized using defined differential UV spectroscopy (DUV), a novel spectroscopic technique. Chlorination experiments were conducted with water samples from Terkos Lake (TL) and Büyükçekmece Lake (BL) (Istanbul, Turkey). The maximum loss of UV absorbance for chlorinated TL and BL raw water samples was observed at a wavelength of 272 nm. Interestingly, differential absorbance at 272 nm (ΔUV(272)) was shown to be a good indicator of UV absorbing chromophores and the formation of trihalomethanes (THMs) resulting from chlorination. Furthermore, differential spectra of chlorinated TL waters were similar for given chlorination conditions, peaking at 272 nm. The correlations between THMs and ΔUV(272) were quantified by linear equations with R (2) values >0.96. The concentration of THMs formed when natural organic matter is chlorinated increases with increasing time and pH levels. Among all THMs, CHCl(3) was the dominant species forming as a result of the chlorination of TL and BL raw water samples. The highest chloroform (CHCl(3)), dichlorobromomethane (CHCl(2)Br), and dibromochloromethane (CHBr(2)Cl) concentration were released per unit loss of absorbance at 272 nm at pH 9 with a maximum reaction time of 168 hours and Cl(2)/dissolved organic carbon ratio of 3.2. Hindawi Publishing Corporation 2013-12-02 /pmc/articles/PMC3865629/ /pubmed/24363624 http://dx.doi.org/10.1155/2013/890854 Text en Copyright © 2013 Kadir Özdemir et al. https://creativecommons.org/licenses/by/3.0/ This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
spellingShingle Research Article
Özdemir, Kadir
Toröz, İsmail
Uyak, Vedat
Assessment of Trihalomethane Formation in Chlorinated Raw Waters with Differential UV Spectroscopy Approach
title Assessment of Trihalomethane Formation in Chlorinated Raw Waters with Differential UV Spectroscopy Approach
title_full Assessment of Trihalomethane Formation in Chlorinated Raw Waters with Differential UV Spectroscopy Approach
title_fullStr Assessment of Trihalomethane Formation in Chlorinated Raw Waters with Differential UV Spectroscopy Approach
title_full_unstemmed Assessment of Trihalomethane Formation in Chlorinated Raw Waters with Differential UV Spectroscopy Approach
title_short Assessment of Trihalomethane Formation in Chlorinated Raw Waters with Differential UV Spectroscopy Approach
title_sort assessment of trihalomethane formation in chlorinated raw waters with differential uv spectroscopy approach
topic Research Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3865629/
https://www.ncbi.nlm.nih.gov/pubmed/24363624
http://dx.doi.org/10.1155/2013/890854
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