phosphate removal from aqueous solutions using polyaniline/ ni0.5zn0.5fe2o4 magnetic nanocomposite

Authors

mohammad hossein tarmahi msc in water and wastewater engineering, department of chemistry, college of science, bandar abbas branch, islamic azad university, bandar abbas, iran

farid moeinpour assistant professor of chemistry, department of chemistry, college of science, bandar abbas branch, islamic azad university, bandar abbas, iran

abstract

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.

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Journal title:
environmental health engineering and management

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