Sorption behavior of polycyclic aromatic hydrocarbons onto humic acid particulates
多环芳烃类有机物在腐殖酸上的吸附行为研究

The chemical compositions of three solid humic acid (HA) samples were measured using cross polarization magic angle spinning carbon-13 (CPMAS 13C) NMR along with elemental analysis, and the humic acids dissociating from the three HA samples were characterized by 1H NMR. The time-dependent sorption behavior of three model polycyclic aromatic hydrocarbons (PAHs), naphthalene, phenanthrene and pyrene, from water onto the three HA samples was determined. The experiments show that the properties and the modes of PAH sorption onto three HAs vastly differ in various sorption stages. At the beginning of sorption, partition maybe the major mode and the sorption coefficients are correlated to the chemical characteristics of the dissolved HAs. Over time, a sharp change of sorption coefficients occurs, indicating a conversion of sorption mode and the uptake parameters probably depend on the chemical composition of the solid HAs.