تعهد نامه
نوع مقاله : مقالات پژوهشی
عنوان مقاله English
نویسندگان English
Background & Purpose: Lead (Pb) is one of the most hazardous heavy metals to the environment, organisms, and humans. Effective methods for removing Pb from aqueous solutions include the use of biological adsorbents. This study investigates the biosorption of Pb (II) from aqueous solutions using the leaves of Saccharum officinarum (sugarcane).
Materials and Methods: Saccharum officinarum leaves were collected from fields in Ahvaz, Iran, and dried at 70°C for 24 hours. Biosorption tests were conducted under varying conditions: pH (2-9), contact time (15-150 minutes, at 15-minute intervals), biomass concentration (0.1-2 g), and initial solution concentration (10-50 mg L-¹). Adsorption isotherms were also evaluated.
Results: The removal efficiency of Pb (II) increased with higher bioadsorbent doses and decreased with higher initial solution concentrations. The lowest removal efficiency (34.6%) was observed at 15 minutes, while the highest (71.5%) occurred between 105 and 150 minutes. The maximum Pb (II) removal efficiency (92.3%) was recorded at an initial concentration of 10 mg L-¹. The biosorption efficiency increased with rising pH levels, peaking at pH 6. Adsorption isotherm data indicated that the biosorption of Pb (II) by Saccharum officinarum leaves adhered well to the Freundlich isotherm model.
Conclusion: The biomass of Saccharum officinarum leaves, as an inexpensive and readily available adsorbent, demonstrates significant potential for the removal of Pb (II) from aqueous solutions.
Open Access Policy: This is an open access article under the terms of the Creative Commons Attribution License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited. To view a copy of this licence, visit https://creativecommons.org/licenses/by/4.0/
کلیدواژهها English