Abstract Naproxen (NPX) is a common PPCPs in wastewater treatment plants which is influenced by the coexistence on its photodegradation. Most research on reasons for NPX photodegradation has focused on the soluble substances in water mainly, and the adsorption effect of solid particles is less. The effects of initial concentration, temperature, and pH on the adsorption of NPX on γ-FeOOH were studied. It was found that the equilibrium time of γ-FeOOH adsorbed NPX was 240 min. The increase of initial concentration and temperature were favorable for the adsorption. The optimal adsorption pH was 7.0, and the adsorption capacity attained 28.05 mg·g−1. It was learned, through model fitting, that the adsorption reaction was in accordance with the Laggenren quasi-second-order kinetic model; the internal diffusion process was the control step, where the adsorption was close to the Langmuir isothermal adsorption model. The thermodynamic calculation showed that ΔG

中文翻译：

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γ-FeOOH在水介质中吸附NPX的动力学和热力学

摘要 萘普生(NPX)是污水处理厂中常见的PPCPs，受共存影响对其进行光降解。NPX光降解原因的研究大多集中在水中的可溶性物质上，对固体颗粒的吸附作用较小。研究了初始浓度、温度和pH值对NPX吸附在γ-FeOOH上的影响。发现γ-FeOOH 吸附NPX 的平衡时间为240 分钟。初始浓度和温度的增加有利于吸附。最佳吸附pH为7.0，吸附容量为28.05 mg·g-1。通过模型拟合可知，吸附反应符合Laggenren准二级动力学模型；内部扩散过程是控制步骤，其中吸附接近朗缪尔等温吸附模型。热力学计算表明，ΔG