In this study, a novel adsorbent was developed based on nickel oxide, strontium oxide and zirconia oxide and was anchored onto graphene oxide to produce a heterogeneous nanocomposite (NiSr–ZrO₂/GO) for efficient removal of ammonia from industrial wastewater. The proposed nanocomposite was characterized using FTIR, XRD, SEM, EDX, BET, and TEM techniques. Effects of changing important parameters on the ammonia adsorption such as pH, adsorbent dosage, contact time, and initial concentration of ammonia were investigated. Different models were conducted to study the kinetics and isotherms equilibrium data of the adsorption process. The results revealed that the adsorption kinetics was well‐fitted to the second‐order model. The equilibrium data were well fitted on Langmuir isotherm model with a maximum monolayer adsorption capacity of 181.81 mg g⁻¹ (R² = 0.997). Adding metal‐containing species to graphene oxide can favorably interact with ammonia.

中文翻译：

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使用镍，锶和氧化锆的新型异质纳米复合材料修饰的氧化石墨烯去除工业废水中的氨

在这项研究中，开发了一种基于氧化镍，氧化锶和氧化锆的新型吸附剂，并将其固定在氧化石墨烯上以产生非均相纳米复合材料（NiSr–ZrO ₂/ GO），以有效去除工业废水中的氨。使用FTIR，XRD，SEM，EDX，BET和TEM技术对提出的纳米复合材料进行了表征。研究了改变重要参数对氨吸附的影响，例如pH，吸附剂用量，接触时间和氨初始浓度。进行了不同的模型研究吸附过程的动力学和等温线平衡数据。结果表明，吸附动力学非常适合二阶模型。平衡数据很好地拟合在Langmuir等温模型上，最大单层吸附容量为181.81 mg g ^-1（R ² = 0.997）。在氧化石墨烯中添加含金属的物质可以与氨发生良好的相互作用。