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环境化学  2015 

己唑醇在土壤中的吸附-解吸特性

Keywords: 己唑醇,土壤,吸附-解吸

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Abstract:

采用批量平衡法和气相色谱法研究了己唑醇在3种土壤中的吸附-解吸特性.结果表明,己唑醇在3种供试土壤中的等温吸附-解吸曲线能较好地符合Freundlich模型,其吸附常数(Kf)分别为0.791、2.274和43.800,显示3种土壤吸附行为存在较大差异.吸附率与土壤有机质含量(OM)、土壤阳离子交换量(CEC)和粘粒含量呈良好相关性.己唑醇在粘土和壤土中的等温吸附线属于L型等温吸附线,砂土中属S型.己唑醇在土壤中的吸附自由能为-5.186——8.164kJ·mol-1,表示吸附机理主要为物理吸附.

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