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Abstract：
Sodium p-perfluorous nonenoxybenzene sulfonate (OBS) is one of the key alternatives to perfluoroalkyl substances (PFASs). Its widespread tendency has increased extensive contamination in the aquatic environment. However, the present treatment technology for OBS exhibited insignificant adsorption capacity and long adsorption time. In this study, three proportions (1:5, 3:5, and 10:1) of chitosan-modified amino-driven graphene oxide (CS-GO) were innovated to strengthen the OBS adsorption capacity, compared with graphene oxide (GO) and graphene (GH). Through the characterization of SEM, BET, and FTIR, it was discovered that CS was synthetized on GO surfaces successfully with a low specific surface area. Subsequently, batch single influence factor studies on OBS removal from simulated wastewater were investigated. The optimum removal efficiency of OBS could be achieved up to 95.4% within 2 h when the adsorbent was selected as CS-GO (10:1), the dosage was 2 mg, and the pH was 3. The addition of inorganic ions could promote the adsorption efficiency of OBS. In addition, CS-GO presented the maximum adsorption energy due to additional functional groups of -NH3, and electrostatic interaction was the foremost motive for improving the adsorption efficiency of OBS. Moreover, OBS exhibited the fastest diffusion coefficient in the CS-GO-OBS solution, which is consistent with the fitting results of adsorption kinetics.
摘要：
对全氟壬烯氧基苯磺酸钠（OBS）是全氟烷基物质（PFAS）的关键替代品之一。它的普遍趋势增加了水生环境中的广泛污染。然而,目前的OBS处理技术吸附量小，吸附时间长。在这项研究中,3比例(1:5,3:5和10:1)的壳聚糖改性氨基驱动氧化石墨烯(CS-GO)被创新以加强OBS吸附能力,与氧化石墨烯（GO）和石墨烯（GH）相比。通过SEM的表征,BET,和FTIR，发现CS在低比表面积的GO表面上成功合成。随后，对模拟废水中OBS去除的影响因素进行了研究。当吸附剂为CS-GO(10:1)时，OBS的最佳去除率可在2h内达到95.4%。剂量是2毫克，pH为3。无机离子的加入可以促进OBS的吸附效率。此外,CS-GO由于-NH3的额外官能团而表现出最大的吸附能，静电相互作用是提高OBS吸附效率的首要动机。此外，OBS在CS-GO-OBS溶液中表现出最快的扩散系数，这与吸附动力学的拟合结果是一致的。
