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本文主要介绍黄浦江底泥对以蒽为代表性物质的多环芳烃的吸附研究.着重探讨其吸附机理,在实验条件下,黄浦江底泥对蒽的吸附属多分子层吸附,可用de Boer-Zwikker公式所表示的极化模型较好地描述,这表明原描述非极性气相分子在极性吸附剂上吸附的多分子层极化模型可应用于稀溶液中溶剂化蒽分子在极性吸附剂上的吸附过程.本研究认为吸附等温线上出现阶梯状形式是由于蒽-甲醇分子的溶剂化作用及底泥颗粒的表面不均匀性所致;未参与溶剂化作用的甲醇分子与溶剂化蒽分子间存在竞争吸附,这一结果预示了其它有机物对多环芳烃在底泥上的竟争吸附作用.
This paper mainly introduces the adsorption of polycyclic aromatic hydrocarbons (PAHs) with anthracene as the representative substance in the bottom sediment of Huangpu River.It focuses on the adsorption mechanism of PAHs, and under the experimental conditions, the adsorption of anthracene on the Huangpu River sediment belongs to multi-molecular layer adsorption, The polarization model represented by the Zwikker formula is well described, indicating that the multi-molecular layer polarization model previously described for the adsorption of non-polar vapor phase molecules on polar adsorbents can be applied to the solution of the anthracene molecules in dilute solution Adsorption process on the adsorbent.The present study suggests that the ladder-like form on the adsorption isotherm is due to the solvation of the anthracene-methanol molecule and the surface inhomogeneity of the sediment particles. The methanol molecules that do not participate in the solvatisation react with the solvent The competitive adsorption of anthracene molecules indicates the competitive adsorption of PAHs on sediments by other organic compounds.