The removal efficiency of phosphate ion from aqueous media using magnesium oxide/iron molybdate (MgO/Fe 2 (MoO 4 ) 3 ) nanocomposite was investigated. MgO nanoparticles were chemically modified by ferric molybdate. Then, the structure and morphology of the nanocomposite was completely investigated using different analyses such as SEM, EDX/Map, FTIR, XRD, TGA, BET, and TEM. The TEM analysis demonstrated that the particles in the mentioned nano-composite were on a nanoscale. BET analysis proved that the nanocomposite was mesoporous with mean pore size of 9.4 nm. The sorption outcomes demonstrated that the highest phosphate sorption yield was achieved at 98.38%, exhibiting remarkable sorption efficiency. Carbonate ions showed to have the highest interfering impact compared to sulfate and nitrate ions, since phosphate ion removal efficiency decreased significantly when carbonate and phosphate ions were simultaneously available in the solution. The thermodynamic studies demonstrated that the current sorption process was spontaneous, possible, and exothermic. The sorption equilibrium investigation showed that the Freundlich isotherm model can describe the adsorption of phosphate ion better than can the Langmuir model, and the maximum sorption capacity was obtained as 30.21 mg/g. Additionally, the adsorbent was successfully regenerated four times and was able to perform the sorption and desorption process well.

中文翻译：

---

干扰离子对使用氧化镁@钼酸铁纳米复合材料从水介质中去除磷酸盐的影响

研究了使用氧化镁/钼酸铁（MgO/Fe 2 (MoO 4 ) 3 ）纳米复合材料从水性介质中去除磷酸盐离子的效率。MgO纳米颗粒被钼酸铁化学改性。然后，使用不同的分析方法，如 SEM、EDX/Map、FTIR、XRD、TGA、BET 和 TEM，对纳米复合材料的结构和形貌进行了全面研究。TEM分析表明所述纳米复合材料中的颗粒为纳米级。BET 分析证明纳米复合材料是介孔的，平均孔径为 9.4 nm。吸附结果表明，磷酸盐吸附率最高，达到 98.38%，表现出显着的吸附效率。与硫酸根和硝酸根离子相比，碳酸根离子的干扰影响最大，因为当溶液中同时存在碳酸根和磷酸根离子时，磷酸根离子去除效率显着降低。热力学研究表明，当前的吸附过程是自发的、可能的和放热的。吸附平衡研究表明，Freundlich等温线模型比Langmuir模型更能描述磷酸盐离子的吸附，最大吸附量为30.21 mg/g。此外，吸附剂已成功再生四次，并且能够很好地进行吸附和解吸过程。吸附平衡研究表明，Freundlich等温线模型比Langmuir模型更能描述磷酸盐离子的吸附，最大吸附量为30.21 mg/g。此外，吸附剂已成功再生四次，并且能够很好地进行吸附和解吸过程。吸附平衡研究表明，Freundlich等温线模型比Langmuir模型更能描述磷酸盐离子的吸附，最大吸附量为30.21 mg/g。此外，吸附剂已成功再生四次，并且能够很好地进行吸附和解吸过程。