Kinetic, isotherm and thermodynamic studies for the removal of Pb²⁺ ion by a novel adsorbent Luffa acutangula (LAPR)

Rais AhmadEnvironmental Research Laboratory, Faculty of Engineering and Technology, Department of Applied Chemistry, Aligarh Muslim University, Aligarh, UP202002, India, Tel. +91 0571 2700920 23, ext. 3000; Fax: +91 0571 2400528Correspondence[email protected]

Shaziya HaseebEnvironmental Research Laboratory, Faculty of Engineering and Technology, Department of Applied Chemistry, Aligarh Muslim University, Aligarh, UP202002, India, Tel. +91 0571 2700920 23, ext. 3000; Fax: +91 0571 2400528Correspondence[email protected]

Abstract

Luffa acutangula peel (LAP) is a cheap material easily available in northern regions of India. LAP in the raw (LAPR) form shows excellent adsorption efficiency towards Pb²⁺ (98%). The effect of various contact time, concentration, pH, and temperature was studied and it was found that reaction is endothermic and spontaneous in nature. Maximum adsorption was observed at 120 min at pH 6. Kinetic study was best obeyed by pseudo-second order. The equilibrium data were best fitted by D–R isotherm. The functional and morphological properties of adsorbents were characterized by FTIR, SEM, and EDX techniques.

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Acknowledgment

The author thanks the UP-CST (Uttar Pradesh-council of science and technology), Uttar Pradesh, India as funding agency for the financial support under the project no: D/352.

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Kinetic, isotherm and thermodynamic studies for the removal of Pb²⁺ ion by a novel adsorbent Luffa acutangula (LAPR)

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Kinetic, isotherm and thermodynamic studies for the removal of Pb2+ ion by a novel adsorbent Luffa acutangula (LAPR)

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Kinetic, isotherm and thermodynamic studies for the removal of Pb²⁺ ion by a novel adsorbent Luffa acutangula (LAPR)