Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
8012284 | Transactions of Nonferrous Metals Society of China | 2016 | 9 Pages |
Abstract
Silver (I) was removed from aqueous environment by aloe vera shell ash supported Ni0.5Zn0.5Fe2O4 magnetic nanoparticles. The adsorbent was characterized by several methods including X-ray diffraction (XRD), scanning electron microscopy (SEM), BET isotherm, vibrating sample magnetometer (VSM) and Fourier transform infrared spectroscopy (FT-IR). To determine the absorption of silver (I) by this adsorbent, different pH values (2-7), adsorbent dose (0.01-0.5 g), concentrations of Ag+ (50, 100, 200, 300, 500, 700 and 1000 mg/L) and exposure time (5-100 min) were experimented. The highest removal efficiency of Ag+ was achieved under optimum condition (30 min and pH=5). The optimum adsorbent dose was 0.20 g (in 50 mL of 100 mg/L Ag+ solution), which achieved a removal efficiency of 98.3%. The maximum monolayer adsorption capacity based on the Langmuir isotherm is 243.90 mg/g. Characterization results revealed that specific surface area and porous volume were 814.23 m2/g and 0.726 cm3/g, respectively. The experimental data were fitted well with the Langmuir and Freundlich isotherm models. Synthesized adsorbent has desired surface area and adsorptive capacity for silver (I) adsorption in aquatic environment.
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Authors
Parisa BEIGZADEH, Farid MOEINPOUR,