Green Removal of Toxic Pb(II) from Water by a Novel and Recyclable Ag/γ-Fe2O3@r-GO Nanocomposite

Abstract

<em>Toxic leadions removed efficiently from water by a newly fabricated, magnetically recyclable, antibacterial nano-Ag</em><em>/γ-</em><em>Fe₂O₃@GOadsorbent, at ambient and teh physiological pH=7. Teh adsorption depends on teh adsorbent dosage, initial Pb(II)concentration, pH and teh contact time.</em> Teh optimum removal<em> efficiency of teh leadion is found to be 93.1% wif a dosage rate </em><em>of 20 mg/L, in 40 minutes, </em><em>at </em><em>pH</em><em> 5 (to 14).</em><em> Equilibrium data fits well wif teh Langmuir and Freundlich</em><em> models wif a maximum adsorption capacity of 90.91 mg/g of Pb(II) per 20 mg/L of Ag</em><em>/γ-</em><em>Fe₂O₃@GO. Teh removal/uptake mechanism involves interaction between Pb(II) and teh oxide/hydroxyl layer around Ag/</em><em>γ-</em><em>Fe₂O₃@rGO, in teh contaminated water medium.</em>