Department of Environmental Engineering and Centre for Environmental Studies, Islamic University of Indonesia, Yogyakarta - 55589, Indonesia.
Acta Chim Slov. 2022 Sep 26;69(3):681-693. doi: 10.17344/acsi.2022.7594.
The purpose of this study was to eliminate phosphate (P) from wastewater using MnFe2O4 nanoparticles. BET, TGA/DTG, FTIR, SEM, TEM, VSM, XRD and EDX/Map analyses were used to determine the MnFe2O4 surface properties. The specific surface area of the adsorbent was 196.56 m2/g and VSM analysis showed that the adsorbent has a ferromagnetic property. The maximum P sorption efficiency using MnFe2O4 (98.52%) was achieved at pH 6, temperature of 55 °C, P concentration of 10 mg/L, time of 60 min, and sorbent dosage of 2.5 g/L, which is a significant value. Also, the thermodynamic study indicated that the P sorption process is spontaneous and endothermic. Moreover, the utmost sorption capacity of P using MnFe2O4 was 39.48 mg/g. Besides, MnFe2O4 can be used for up to 6 reuse cycles with high sorption efficiency (>91%). Also, MnFe2O4 was able to remove phosphate, COD, and BOD5 from municipal wastewater with considerable removal efficiencies of 82.7%, 75.8%, and 77.3%, respectively.
本研究旨在利用 MnFe2O4 纳米粒子从废水中去除磷酸盐（P）。采用 BET、TGA/DTG、FTIR、SEM、TEM、VSM、XRD 和 EDX/Map 分析对 MnFe2O4 的表面性质进行了测定。吸附剂的比表面积为 196.56 m2/g，VSM 分析表明吸附剂具有铁磁性。在 pH 为 6、温度为 55°C、P 浓度为 10 mg/L、时间为 60 min、吸附剂用量为 2.5 g/L 的条件下，MnFe2O4 的最大 P 吸附效率（98.52%），这是一个显著的值。此外，热力学研究表明 P 的吸附过程是自发和吸热的。此外，MnFe2O4 的最大 P 吸附容量为 39.48 mg/g。此外，MnFe2O4 可重复使用 6 次以上，且具有较高的吸附效率（>91%）。此外，MnFe2O4 能够去除城市废水中的磷酸盐、COD 和 BOD5，去除效率分别为 82.7%、75.8%和 77.3%。
