Exploring the correlations between common UV measurements and chemical fractionation for natural waters

Al-Juboori, Raed A. and Yusaf, Talal and Pittaway, Pamela A. (2016) Exploring the correlations between common UV measurements and chemical fractionation for natural waters. Desalination and Water Treatment , 57 (35). pp. 16324-16335. ISSN 1944-3994

Abstract

Chemical fractionation is a powerful tool for unravelling the reasons behind water treatment problems such as the formation of disinfection by-products (DBPs). This technique can however be costly and time-consuming. Hence, exploring quick affordable surrogate measurements to this technique is of great importance for water treatment operators. In this study, the correlations between aquatic carbon fractions and single wavelength and UV ratios of A254, A280, A254/A204, A250/A365 and A254/A436 were examined for seven water bodies located in South-east Queensland, Australia. It was observed that A254/A204 has a strong and significant correlation with hydrophobic/hydrophilic ratio (R2 = 0.984). A250/A365 exhibited a weak but significant correlation with the same fraction ratio (R2 = 0.687) suggesting that the chemical fractions cannot be assumed of a certain molecular size. A254/A436 had a weak and insignificant correlation with carbon fractions (R2 = 0.0506). The hydrophobic fraction of the seven water bodies showed a strong and significant correlation with A254 (R2 = 0.968) and A280 (R² = 0.958). The diverse carbon source of the tested water bodies confirms the reliability of the observed correlations. The results of this study highlight the potential use of UV absorbance as a real-time technique for monitoring the structural change of aquatic carbon.


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Item Type: Article (Commonwealth Reporting Category C)
Refereed: Yes
Item Status: Live Archive
Additional Information: Permanent restricted access to Published version due to publisher copyright policy.
Faculty / Department / School: Current - Faculty of Health, Engineering and Sciences - School of Civil Engineering and Surveying
Date Deposited: 03 Sep 2015 04:58
Last Modified: 16 Jan 2018 01:08
Uncontrolled Keywords: DOC, chemical fractionation, hydrophobicity, hydrophilicity, single wavelength UV and UV ratio
Fields of Research : 09 Engineering > 0905 Civil Engineering > 090509 Water Resources Engineering
Identification Number or DOI: 10.1080/19443994.2015.1079805
URI: http://eprints.usq.edu.au/id/eprint/27659

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