title: Sorption of polycyclic aromatic hydrocarbons on particulate organic matters.
abstract: Particulate organic matter (POM) is a key organic matter fraction which can influence soil fertility. Its interactions with hydrophobic organic pollutants (HOCs) have not been characterized and the mechanisms of retention of HOCs by POM remain unclear. In the present study, sorption behaviors of polycyclic aromatic hydrocarbons (PAHs) naphthalene (NAP), phenanthrene (PHE), and pyrene (PYR) by POMs separated from different soils were examined and the POMs were characterized by elemental analysis, solid state (13)C NMR, and Fourier transform infrared spectroscopy (FT-IR). The results indicated that POMs were mainly composed of aliphatic components with high polarity. The different original POMs showed similar chemical composition and configuration. Sorption behaviors of PAHs indicated that there was no significant difference in sorption capacity among the POMs. Sorption of NAP and PHE by POMs displayed a nonlinear isotherm, while sorption of PYR yielded a linear isotherm. No significant hysteresis and ionic strength effect were observed for PAH desorption from the POMs.
authors.affiliation: State Key Laboratory of Environmental Chemistry and Ecotoxicology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, P. O. Box 2871, Beijing 100085, China.
authors.forename: Xueyan
authors.initials: X
authors.lastname: Guo
authors.forename: Lei
authors.initials: L
authors.lastname: Luo
authors.forename: Yibing
authors.initials: Y
authors.lastname: Ma
authors.forename: Shuzhen
authors.initials: S
authors.lastname: Zhang
mesh_terms: D000327:Adsorption; D007202:Indicators and Reagents; D009682:Magnetic Resonance Spectroscopy; D052638:Particulate Matter / Q000737:chemistry*; D011084:Polycyclic Aromatic Hydrocarbons / Q000302:isolation & purification*; D012987:Soil / Q000032:analysis; D017550:Spectroscopy, Fourier Transform Infrared; D013816:Thermodynamics
chemical_list: D007202:Indicators and Reagents; D052638:Particulate Matter; D011084:Polycyclic Aromatic Hydrocarbons; D012987:Soil