Journal
JOURNAL OF THE IRANIAN CHEMICAL SOCIETY
Volume 12, Issue 11, Pages 2007-2013Publisher
SPRINGER
DOI: 10.1007/s13738-015-0675-z
Keywords
Magnetic nanocomposite; Nickel-zinc ferrite; Cr(VI); Mo(VI); V(V) and W(VI) oxyanions; Water purification; Preconcentration
Categories
Funding
- Bu-Ali Sina University Research Council
- Centre of Excellence in Development of Environmentally Friendly Methods for Chemical Synthesis (CEDEFMCS)
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Ni0.5Zn0.5Fe2O4 nanocomposite was synthesized and used for the removal and preconcentration of Cr(VI), Mo(VI), V(V) and W(VI) ions. The effect of various parameters such as pH, amount of the adsorbent and contact time on the adsorption efficiency of Cr(VI), Mo(VI), V(V) and W(VI) ions on the adsorbent were studied. The maximum adsorption occurred at pH 4.0 for Cr(VI) and W(VI) and at pH 5.0 for Mo(VI) and V(V). Maximum adsorption capacity (q(max)) was estimated using Langmuir adsorption model as 48.5, 38.8, 28.0 and 72.0 mg g(-1) for Cr(VI), Mo(VI), V(V) and W(VI) ions, respectively. The adsorbed oxyanions were then desorbed by NaOH solution. The concentration of the ions in desorbed solution was determined spectrophotometrically. Calibration curves were linear for Cr(VI), Mo(VI), V(V) and W(VI) ions in the range 0.7-150.0, 0.9-70.0, 2.0-50.0 and 1.0-40.0 ng mL(-1) for an initial sample solution of 100 mL, respectively.
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