Journal
ENVIRONMENTAL PROGRESS & SUSTAINABLE ENERGY
Volume 39, Issue 2, Pages -Publisher
WILEY
DOI: 10.1002/ep.13332
Keywords
adsorption equilibrium; inorganic anions; phosphate and nitrate; magnetized GO
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Funding
- University of Tehran, Iran's National Elites Foundation
- Iran High-Tech Laboratory Network
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Magnetic Fe3O4 nanoparticle decorated graphene oxide (GO) was modified with strontium nanoparticles (MGO-Sr) and applied for enhanced removal of phosphate and nitrate ions from river and sewage water samples. The nanocomposite's features were investigated using Fourier transform-infrared spectrometry, field emission-scanning electron microscopy, energy-dispersive X-ray spectroscopy, and X-ray diffraction. The effective parameters, adsorption efficiency, regeneration, and field application of MGO-Sr were also studied. Adsorption isotherm and kinetic models were applied for evaluation of experimental adsorption process. The data was in well comply with Langmuir isotherm and pseudo-second-order comparing with other models. Langmuir maximum adsorption capacity was obtained equal to 238.09 mg/g for phosphate and 357.14 mg/g for nitrate. Van't Hoff thermodynamic predicted an exothermic nature for adsorption process followed by a physisorption mechanism. The prepared nanocomposite provided a high-removal efficiency toward phosphate and nitrate ions in river and sewage water. Hence, it is applicable in water remediation process.
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