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首页> 外文期刊>Environmental toxicology and chemistry >COSOLVENT EFFECTS OF PHENANTHRENE SORPTION-DESORPTION ON A FRESHWATER SEDIMENT
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COSOLVENT EFFECTS OF PHENANTHRENE SORPTION-DESORPTION ON A FRESHWATER SEDIMENT

机译：菲吸附解吸对淡水沉积物的共溶剂作用

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This study evaluated the effects of the water-miscible cosolvent methanol on the sorption-desorption of phenanthrene by the natural organic matter (NOM) of a freshwater sediment. A biphasic pattern was observed in the relationship between the log of the carbon-normalized sorption distribution coefficient (K_(oc)) and the volumetric fraction of water-miscible cosolvent (f_c), in this case methanol, that was accounted for with phenanthrene solubility data. Results also indicated that methanol elicited additional effects on phenanthrene sorption beyond the solution phase effects. The level of f_c was observed to have a significant effect on sorption-desorption hysteresis, with hysteresis being greater for treatments where phenanthrene and sediment were equilibrated with methanol-phenanthrene solutions but desorbed with aqueous solutions. These results are discussed in light of the deformable pore network of the rubbery/glassy NOM polymer construct.
机译：这项研究评估了与水混溶的助溶剂甲醇对菲被淡水沉积物的天然有机物（NOM）吸附-解吸的影响。在碳归一化吸附分布系数的对数（K_（oc））与水混溶助溶剂（f_c）的体积分数之间的关系中观察到双相模式，在这种情况下，甲醇与菲的溶解度有关数据。结果还表明，甲醇在溶液相作用之外还对菲吸附产生了其他作用。观察到f_c的水平对吸附-解吸滞后具有显着影响，对于菲和沉淀物用甲醇-菲溶液平衡但被水溶液解吸的处理，滞后作用更大。鉴于橡胶/玻璃态NOM聚合物构建体的可变形孔网络，讨论了这些结果。

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