Kinetic and Isothermal Biosorption Studies of Co(II), Cu(II) and Ni(II) Using Polyalthia longifolia Leaf Powder

Rabia Rehman1,*, Umer Shafique2, Jamil Anwar1 and Samina Ghafoor1

1Institute of Chemistry, University of the Punjab, Lahore-54590, Pakistan

2Department of Ecological Chemistry, Helmholtz Centre for Environmental Research, Leipzig, Germany

*Corresponding author: Fax: +92 42 99230998; Tel: +92 42 99230463, Ext: 870; E-mail:


Kinetic and isothermal biosorption studies of cobalt, copper and nickel ions using Polyalthia longifolia leaf powder has been carried out in this study on batch scale. Various factors like adsorbent dose, pH, initial concentration of metal ion and agitation time were optimized. Maximum biosorption of Cu(II), Co(II) and Ni(II) occurred at pH 6, 6 and 5, respectively. Isothermal models like Langmuir, Freundlich and Temkin were studied and observed to fit well. The maximum removing capacity of Polyalthia longifolia leaves was found to be 1.74, 3.99 and 4.08 mg/g for copper, cobalt and nickel ions, respectively following pseudo-second-order model. So, Polyalthia longifolia leaves found to besuitable for amputation of cobalt, copper and nickel ions in an environmentally benign way.


Biosorption, Polyalthia longifolia, Heavy metals, Isotherms, Kinetics.

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