TY - JOUR
T1 - The role of the characteristics of humic substances in binding with benzo[h]quinoline
AU - Hsieh, Ping‐Chieh
AU - Brimblecombe, Peter
AU - Lee, Chon-Lin
AU - Hsu, Shih-Han
PY - 2012/2
Y1 - 2012/2
N2 - 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
AB - 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
U2 - 10.1002/etc.735
DO - 10.1002/etc.735
M3 - Article
SN - 1552-8618
VL - 31
SP - 246
EP - 252
JO - Environmental Toxicology and Chemistry
JF - Environmental Toxicology and Chemistry
IS - 2
ER -