Effects of different sediment fractions on sorption of galaxolide |
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Authors: | Lixia Jin Mengchang He and Jinghuan Zhang |
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Institution: | (1) Institute of Soil Science and Soil Conservation, Research Centre for BioSystems, Land Use and Nutrition (IFZ), Justus Liebig University Giessen, Heinrich-Buff-Ring 26, 35392 Giessen, Germany; |
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Abstract: | Sorption isotherms of galaxolide (HHCB) of different fractions from two sediments with different mineral and organic carbon
contents were determined to compare HHCB sorption behavior and contribution to the total sorption. The HHCB sorption isotherms
that used the batch equilibration method were studied on different sediments of different fractions. The sorption isotherms
of 600°C heating fractions were detailed using the linear model, while the other fractions were nonlinear and fitted well
with the Freundlich model. The dissolved organic carbon (DOC) removed, NaOH extracted, and 375°C heating fractions showed
more nonlinear sorption than the original sediments, which suggested more heterogeneous sorption sites in these fractions.
Compared to the original sediments, the 375°C heating fractions had higher carbonnormalized distribution coefficient (K
oc) values, indicating a higher sorption affinity for HHCB. Among the different sediment fractions, the contribution of the
600°C heating fractions to the overall sorption were the lowest (< 20%), while the 375°C heating fractions were the highest
(up to 85%). |
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Keywords: | |
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