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首页> 外文期刊>Journal of Applied Polymer Science >Enhanced adsorption of perfluorooctanoic acid using functionalized imidazolium iodide ionic liquid-based poly (glycidyl methacrylate)
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Enhanced adsorption of perfluorooctanoic acid using functionalized imidazolium iodide ionic liquid-based poly (glycidyl methacrylate)

机译：使用官能化咪唑碘化物离子液体基聚（甲基丙烯酸缩水甘油酯）增强了全氟辛酸的吸附

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摘要

Per- and polyfluoroalkyl substances (PFASs) are among the emerging pollutants of public health and the environment due to environmental persistence, bioaccumulation, and potential toxicity. Removal of PFAS under mild conditions is a challenge. Therefore, employment of organic functionality immobilized on polymeric sorbents has driven significant attention. Herein, new imidazolium-based ionic liquid (IIL) covalently grafted on poly (glycidyl methacrylate) (PGMA) support was synthesized successfully and characterized by Fourier transform infrared, scanning electron microscope, and thermal gravimetric analysis. The functionalized imidazolium ionic liquid-based PGMA was applied in perfluorooctanoic acid (PFOA) removal from an aqueous solution. The effect of contact time, adsorbent dose, temperature, pH, and counter anions investigated on the extent of adsorption has been investigated. The concentration of PFOA solutions was measured by ethyl violet active substances assay, and equilibrium data were analyzed by Langmuir, Freundlich and Tempkin isotherms. The experimental results have been fitted to Langmuir model at ambient temperature and the maximum monolayer coverage capacity (q(m)) was found to be 769.23 mg/g. Also the thermodynamic parameters were obtained, and observed that the adsorption of PFOA onto imidazolium iodide-PGMA was an endothermic and spontaneous process at the temperatures under investigation.
机译：由于环境持久性、生物累积性和潜在毒性，Per-和聚氟烷基物质（PFASs）是公共卫生和环境的新兴污染物之一。在温和条件下清除PFA是一项挑战。因此，在聚合物吸附剂上固定化有机官能团的应用引起了广泛关注。在此，成功地合成了共价接枝在聚甲基丙烯酸缩水甘油酯（PGMA）载体上的新型咪唑基离子液体（IIL），并通过傅立叶变换红外光谱、扫描电子显微镜和热重分析对其进行了表征。将基于功能化咪唑离子液体的PGMA应用于水溶液中全氟辛酸（PFOA）的去除。研究了接触时间、吸附剂剂量、温度、pH值和反阴离子对吸附程度的影响。通过乙基紫活性物质测定法测量PFOA溶液的浓度，并通过Langmuir、Freundlich和Tempkin等温线分析平衡数据。在室温下，实验结果符合Langmuir模型，发现最大单层覆盖容量（q（m））为769.23 mg/g。此外，还获得了热力学参数，并观察到在所研究的温度下，全氟辛烷磺酸在碘化咪唑PGMA上的吸附是一个吸热自发过程。

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