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研究了壬基酚聚氧乙烯醚(NPEO-10)在3种具有不同比表面积和孔径大小的超高交联树脂上的吸附行为与机理.3种超高交联树脂对壬基酚聚氧乙烯醚的吸附量受它们的比表面积和孔径大小以及溶液温度的影响.壬基酚聚氧乙烯醚在3种超高交联树脂上的吸附等温线可以用Langmuir和双Langmuir模型很好地拟合,而用Freundlich模型拟合则效果不好,但这些拟合曲线都具有相似的形状.热力学分析表明吸附过程主要表现为吸附质分子的疏水部分和吸附剂表面的作用以及吸附质分子在其表面形成胶束状的聚集体,即分散的、单层及双层聚集体的混合分布.吸附动力学曲线中的两个平台也证明了吸附过程存在单层和双层聚集体.脱附研究为实现超高交联树脂吸附分离水溶液中的壬基酚聚氧乙烯醚提供了合适的操作条件.
The adsorption behavior and mechanism of nonylphenol polyoxyethylene ether (NPEO-10) on three kinds of ultra-high crosslinked resins with different specific surface area and pore size were studied. The adsorption capacity of vinyl ethers is affected by their specific surface area, pore size and solution temperature.The adsorption isotherms of nonylphenol polyoxyethylene ether on three kinds of ultrahigh cross-linked resins can be well described by Langmuir and Langmuir models However, fitting with Freundlich model is ineffective, but these fitting curves have similar shapes.The thermodynamic analysis shows that the adsorption process is mainly represented by the hydrophobic part of the adsorbate molecules and the surface of the adsorbent, The formation of micelle-like aggregates on the surface, ie, the mixed distribution of dispersed, monolayer and bilayer aggregates, and the two platforms in the adsorption kinetics curve also demonstrated the presence of monolayer and bilayer aggregates in the adsorption process. In order to achieve ultra-high cross-linked resin adsorption separation of nonylphenol ethoxylates in aqueous solution to provide the appropriate operating conditions.