| Popis: |
Heavy metals that are present in surface water and in wastewater are becoming a severe environmental problem. The objective of this paper is, therefore, to examine the performance of powdered banana peel for adsorption of Copper (II) from textile wastewater, particularly the Ayka Addis textile and investment group. The banana peels were collected from domestic wastes and grounded to dry powder having particle size of 150μm. The properties of powdered banana peel were characterized by scanning electron microscope and Fourier transforms infrared. The moisture content, ash content, volatile matter and bulk density of Powdered Banana Peel were 3.8%, 3.5%, 37.47% and 0.02g/cm3, respectively. Copper (II) adsorption depends on pH, adsorbent dose and initial concentration of the adsorbate and contact time. At pH 5, adsorbent dose of 2g/100ml, 80mg/l of initial concentration of Copper (II) and contact time of 90min, a maximum of 96.81% and 68.982%, removal efficiencies were observed for synthetic wastewater and the textile wastewater, respectively. The lowering in the removal efficiency for the textile wastewater could be due the matrix effect that contains competing substances on the adsorption process. Among the Langmuir and Freundlich adsorption isotherm models, the adsorption fitted well with the Langmuir isotherm model (R2 = 0.998). Copper (II) adsorption followed the second order kinetic better than the first order kinetic models. The results suggest that powdered banana peel can be used as an adsorbent for the removal of copper (II) from textile wastewater. |
