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

Document Type: Research Article

Authors

1 Young Researchers and Elites Club, Qom Branch, Islamic Azad University, Qom, Iran

2 Industrial and Mechanical Engineering Department, Qazvin Branch, Islamic Azad University, P.O. Box 34185-1416 Qazvin, I.R. IRAN

3 Young Researchers and Elites Club, North Tehran Branch, Islamic Azad University, Tehran, Iran

4 Nuclear Science and Technology Research Institute, 11365-8486, Tehran, Iran

5 Department of Chemistry, Tarbiat Modares University, P.O. Box 14115-175, Tehran, Iran

Abstract

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

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Main Subjects


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