J. Mohammed-Ridha, M., Shihab Ahmed, A., Nafea Raoof, N. (2017). Investigation of The Thermodynamic, Kinetic and Equilibrium Parameters of Batch Biosorption of Pb(II), Cu(II), And Ni(II) From Aqueous Phase using Low Cost Biosorbent. , 20(1), 298-310.
Mohanad J. Mohammed-Ridha; Ali Shihab Ahmed; Nagham Nafea Raoof. "Investigation of The Thermodynamic, Kinetic and Equilibrium Parameters of Batch Biosorption of Pb(II), Cu(II), And Ni(II) From Aqueous Phase using Low Cost Biosorbent". , 20, 1, 2017, 298-310.
J. Mohammed-Ridha, M., Shihab Ahmed, A., Nafea Raoof, N. (2017). 'Investigation of The Thermodynamic, Kinetic and Equilibrium Parameters of Batch Biosorption of Pb(II), Cu(II), And Ni(II) From Aqueous Phase using Low Cost Biosorbent', , 20(1), pp. 298-310.
J. Mohammed-Ridha, M., Shihab Ahmed, A., Nafea Raoof, N. Investigation of The Thermodynamic, Kinetic and Equilibrium Parameters of Batch Biosorption of Pb(II), Cu(II), And Ni(II) From Aqueous Phase using Low Cost Biosorbent. , 2017; 20(1): 298-310.

Investigation of The Thermodynamic, Kinetic and Equilibrium Parameters of Batch Biosorption of Pb(II), Cu(II), And Ni(II) From Aqueous Phase using Low Cost Biosorbent

ALNAHRAIN JOURNAL FOR ENGINEERING SCIENCES
Article 1, Volume 20, Issue 1, 2017, Pages 298-310
Authors
Mohanad J. Mohammed-Ridha; Ali Shihab Ahmed; Nagham Nafea Raoof
Abstract
In this study, low cost biosorbent ̶ inactive biomass (IB) granules (dp=0.433mm) taken from drying beds of Al-Rustomia Wastewater Treatment Plant, Baghdad-Iraq were used for investigating the optimum conditions of Pb(II), Cu(II), and Ni(II) biosorption from aqueous solutions. Various physico-chemical parameters such as initial metal ion concentration (50 to 200 mg/l), equilibrium time (0-180 min), pH (2-9), agitation speed (50-200 rpm), particles size (0.433 mm), and adsorbent dosage (0.05-1 g/100 ml) were studied. Six mathematical models describing the biosorption equilibrium and isotherm constants were tested to find the maximum uptake capacities: Langmuir, Freundlich, Redlich–Peterson, Sips, Khan, and Toth models. The best fit to the Pb(II) and Ni(II) biosorption results was obtained by Langmuir model with maximum uptake capacities of 52.76 and 36.97 mg/g for these two ions respectively. While for Cu(II) the corresponding value was 38.07 mg/g obtained with Khan model. The kinetic study demonstrated that the optimum agitation speed was 400 rpm, at which the best removal efficiency and/or minimum surface mass transfer resistance (MSMTR) was achieved. A pseudo-second-order rate kinetic model gave the best fit to the experimental data (R 2 = 0.99), resulting in mass transfer coefficient values of 42.84×〖10〗^(-5), 1.57×〖10〗^(-5) , and 2.85×〖10〗^(-5) m/s for Pb(II), Cu(II), and Ni(II) respectively. The thermodynamic study showed that the biosorption process was spontaneous and exothermic in nature.
Keywords
Biosorption; Biomass; Isotherm Models; Biosorption Kinetics; Biosorption Thermodynamics
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