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非离子表面活性剂在土壤/沉积物中的吸附模型研究

Keywords: 非离子表面活性剂,土壤/沉积物,吸附模型

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Abstract:

采用振荡平衡法研究了非离子表面活性剂Brij35、Brij30、Tween-80、TritonX-100在土壤/沉积物上的吸附行为及Brij35、Brij30在不同处理土壤上的吸附特征。结果表明,Brij35、Tween-80、TritonX-100在土壤/沉积物上的吸附等温线呈Langmuir型,而Brij30呈S型,其达到吸附饱和时的平衡浓度分别为110、55、200、25mg·L~(-1);Brij35、TritonX-100和ween-80主要通过疏水基在土壤/沉积物有机质中的分配作用而吸附,而Brij30的吸附是亲水基团与土壤/沉积物表面的相互作用以及疏水基团之间相互作用共同作用的结果。

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