Removal of Toxic Heavy Metals in Water by Using Natural Products as Adsorbent
Abstract
The objective of this work was to investigate the bract, stem, midrib, and banana peel of cultivated banana as an adsorbent for the removal of five heavy metals which are Pb(II), Ni(II), Cu(II), Mn(II), and Zn(II) from synthetic wastewater. The adsorption factors studied were the contact time, concentration of solutions and pH. Moreover, we also compared the adsorption processes based on the Langmuir and Freundlish isotherms. The adsorption efficiency in 10 mg/L of heavy metals were found, from high to low efficiencies as follow: banana peel (91.50 – 98.43%), bract (82.77 – 96.80%), stem (77.40 – 96.73%), and midrib (67.77 – 98.03%), respectively. The adsorption capacity of M(II) ions on the adsorbents were proportional to the initial concentration of solutions. From this work, the adsorbents can be used to adsorb all kinds of these heavy metal ions, therefore, they might be applied for another wastewater treatment
Keywords : heavy metal, adsorption, banana tree
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