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.
J Hazard Mater. 2010 Jan 15;173(1-3):130-6. doi: 10.1016/j.jhazmat.2009.08.065. Epub 2009 Aug 22.
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.
颗粒态有机物（POM）是一种关键的有机物质，可影响土壤肥力。它与疏水性有机污染物（HOCs）的相互作用尚未得到表征，POM 保留 HOCs 的机制仍不清楚。在本研究中，考察了从不同土壤中分离出的颗粒态有机物（POM）对多环芳烃（NAP、PHE 和 PYR）的吸附行为，并通过元素分析、固态（13）C NMR 和傅里叶变换红外光谱（FT-IR）对 POM 进行了表征。结果表明，POM 主要由高极性的脂肪族成分组成。不同的原始 POM 具有相似的化学组成和结构。多环芳烃的吸附行为表明，POM 之间的吸附能力没有显著差异。NAP 和 PHE 被 POM 吸附时呈现非线性等温线，而 PYR 的吸附则呈现线性等温线。从 POM 上解吸多环芳烃时，没有观察到明显的滞后和离子强度效应。
