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Effect of pH on Hg(II) removal from aqueous solution [Conditions: initial conc. of Hg(II) solution = 10 mg/L, contact time = 3 h and 30 min. for CuFe2O4 and CuFe2O4@Polythiophene composite; respectively, adsorbent dose = 0.03 g, volume of Hg(II) solution = 50 mL].
