期刊名称：Environmental Health Engineering and Management
印刷版ISSN：2423-3765
电子版ISSN：2423-4311
出版年度：2017
卷号：4
期号：2
页码：65-71
DOI：10.15171/EHEM.2017.10
语种：English
出版社：Kerman University of Medical Sciences
摘要：Background: Phosphorus is an indispensable element for the growth of animals and plants. There are several environmental problems related to phosphate;therefore,the technical and economic methods of removing phosphate are of great importance. This study evaluated the efficiency of polyaniline/Ni0.5Zn0.5Fe2O4 magnetic nanocomposite in removing phosphate from aqueous environments. Methods: The adsorbent was characterized by several methods,including X-ray diffraction (XRD),scanning electron microscopy (SEM),vibrating sample magnetometer (VSM),and Fourier transform infrared (FT-IR) spectroscopy. Then,the potential of the adsorbentto adsorb phosphate was investigated. The effects of the parameters of contact time (5-60 minutes),pH (3-9),adsorbent dosage (0.05-0.6 g),and initial phosphate concentration (2-100 mg/L) on the phosphate removal yield were studied. All phosphate ion concentrations were measured using the ammonium molybdate spectrophotometric method. Results: The results showed that a time of 30 minutes,pH of 5,and adsorbent dose of 0.4 g were the optimum conditions for phosphate removal through adsorption. Increasing the initial concentration of phosphate from 2 to 100 mg/L decreased the removal efficiency from 90.3% to 32%. The experimental data was fitted well with the Freundlich isotherm model (R2 = 0.997). Conclusion: Polyaniline/Ni0.5Zn0.5Fe2O4 magnetic nanocomposite removes phosphate from aqueous solutions with a simple and environmentally benign procedure. The maximum adsorption capacity based on Langmuir isotherm (R2 = 0.931) is 85.4 mg/g. This magnetic nanocomposite is applicable in managing water resource pollution caused by phosphate ions..
