MEI Yi, WANG Li-ying
(State Key Laboratory of Environmental Geochemistry, Institute of Geochemistry, Chinese Academy of Sciences, Guiyang 550081, China)
Abstract: Dissolved organic matter (DOM) in nature waters (e.g. ground water, lake, river and ocean) receives much attention because of its remarkable ecology and the environment function. More importantly, DOM can affect the fate of the contaminants in environment. For instance, interactions between contaminants and DOM can change their transport, toxicity and bioavailability, attenuating their harm for organisms. In this work, we fractionated large amounts of lake water into hydrophobic DOM-fractions and determined the partitioning coefficients (KDOC) of perylene binding to DOM-fractions by florescence quenching titration. Effect of ion strengthens of the solutions on KDOC of perylene was also examined. Results show that KDOC values of perylene was positive correlated with molecular weights and UV absorbance at 280 nm (ε280) and KDOC increased with increasing ion strengthens, suggesting that the binding is controlled by hydrophobic interactions.
Keywords: dissolved organic matter; hydrophobic fraction; hydrophobic organic contaminant; florescence quenching; ion strengthen
Email: meiyi@mail.gyig.ac.cn
ACTA MINERALOGICA SINICA Vol. 36, No. 2, 2016, Page 295-300
