Title of article :
Green Removal of Toxic Pb(II) from Water by a Novel and Recyclable Ag/γ-Fe2O3@r-GO Nanocomposite
Author/Authors :
Haerizade, Bibi Narjes Islamic Azad University - Qom , Ghavami, Monireh Industrial and Mechanical Engineering Department - Qazvin Branch , Koohi, Maryam North Tehran Branch - Islamic Azad University - Tehran , Janitabar Darzi, Simin Nuclear Science and Technology Research Institute - Tehran , Rezaee, Nasibeh Department of Chemistry - Tarbiat Modares University - Tehran , Kassaee, Mohammad Zaman Department of Chemistry - Tarbiat Modares University - Tehran
Abstract :
Toxic leadions removed efficiently from water by a newly fabricated, magnetically
recyclable, antibacterial nano-Ag/γ-Fe2O3@GOadsorbent, at ambient and the physiological pH=7.
The adsorption depends on the adsorbent dosage, initial Pb(II)concentration, pH and
the contact time. The optimum removal efficiency of the leadion is found to be 93.1% with a dosage
rate of 20 mg/L, in 40 minutes, at pH 5 (to 14). Equilibrium data fits well with the Langmuir and
Freundlich models with a maximum adsorption capacity of 90.91 mg/g of Pb(II) per 20 mg/L of
Ag/γ-Fe2O3@GO. The removal/uptake mechanism involves interaction between Pb(II) and
the oxide/hydroxyl layer around Ag/γ-Fe2O3@rGO, in the contaminated water medium.
Keywords :
Removal , Batch , Adsorption isotherms , Adsorbent , Ag/γ-Fe2O3@GO , Pb(II)
Journal title :
Astroparticle Physics
