Vol.2 , No. 6, Publication Date: Dec. 18, 2017, Page: 46-51
[1] | Khaled Muftah Elsherif, Chemistry Department, Faculty of Science, University of Benghazi, Benghazi, Libya. |
[2] | Abdunaser Mabrok Ewlad-Ahmed, Chemistry Department, Faculty of Arts and Science Msallata, Al-Mergheb University, Al-Khoms, Libya. |
[3] | Abdullah Treban, Chemistry Department, Faculty of Arts and Science Msallata, Al-Mergheb University, Al-Khoms, Libya. |
We have studied the efficiency of a low-cost biosorbent for the removal of some heavy metal ions. In this work, orange peels (OP) powder for the removal of Fe(III), Cu(II), and Co(II) ions from aqueous solutions has been investigated. Several parameters which affect the adsorption process have been evaluated. These parameters included; pH, contact time, biosorbent dose, and initial metal ion concentration. Batch adsorption studies were carried out to evaluate theses effects. The best biosorption conditions were found as follows: pH at (4-5), biomass dosage of 0.1 g, and contact time at 30 mins. Freundlich and Langmuir isotherm models were used to fit the adsorption data. The adsorption capacity of OP for metal ions were also evaluated using Langmuir isotherm model. The maximum adsorption capacities (Qm) estimated from the Langmuir isotherm model for Fe(III), Cu(II), and Co(II) were 12.26, 129.9 and 11.48 mg/g respectively. The Freundlich constant (n) and separation factor (RL) values suggest that the metal ions were favorably adsorbed onto biosorbent.
Keywords
Biosorbent, Heavy Metals, Orange Peels, Fe, Cu, Co
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