The role of the characteristics of humic substances in binding with benzo[h]quinoline

Hsieh, Ping‐Chieh, Brimblecombe, Peter, Lee, Chon-Lin and Hsu, Shih-Han (2012) The role of the characteristics of humic substances in binding with benzo[h]quinoline. Environmental Toxicology and Chemistry, 31 (2). pp. 246-252. ISSN 1552-8618

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The binding constants (K-DOC) of the mixture of benzo[h]quinoline and its protonated analog, benzo[h]quinolinium, to four types of humic substances obtained from the International Humic Substances Society were determined by the fluorescence quenching method. A simple mixing model was used to eliminate the fluorescent interference from the minor analog in the solution and to deduce K-mix, which represents the overall binding as the sum of that for the individual analogs. The characteristics of humic substances, especially their hydrophobicity and aromaticity, established by principal component analysis of structural and elemental compositions, were the main determinants of the binding affinity with both benzo[h]quinoline and benzo[h]quinolinium (K-BQ and K-BQH(+) across a range of pH values. The strongest overall affinity of benzo[h]quinoline for humic substances is observed near pH 4 and with more hydrophobic humic substances, which suggests possible choices in attempts at remediation of benzo[h]quinoline containing particles with humic substances

Item Type: Article
Faculty \ School: Faculty of Science > School of Environmental Sciences
UEA Research Groups: Faculty of Science > Research Groups > Centre for Ocean and Atmospheric Sciences
Faculty of Science > Research Groups > Marine and Atmospheric Sciences (former - to 2017)
Depositing User: Rhiannon Harvey
Date Deposited: 07 Mar 2012 14:56
Last Modified: 23 Oct 2022 00:10
DOI: 10.1002/etc.735

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