Sorption governs the fate,transport,bioavailability and toxicity of hydrophobic organic compounds(HOCs)in soils and sediments.Sorption of HOCs is directly related to structure,property and composition of natural organic matter(NOM)presented in the soils and sediments.However,whether an aliphatic carbon or aromatic carbon of NOM is important to the sorption of HOCs is controversial.This study investigates the effect of condensed SOM(i.e.,NHC)in soils and recent sediments on sorption and fate of HOCs.We examine the sorption behavior of phenanthrene(Phen)on the original soils/sediments and their isolated organic matter fractions and to relate the sorption behaviors of Phen to the composition and properties of the organic matter fractions.
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