Adsorptive evaluation of aluminum-doped sugarcane bagasse for PB(II) removal from mining wastewater
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Abstract
In Ecuador, mining activity represents a major source of water pollution due to the release of heavy metals into water bodies. This study aimed to evaluate the efficiency of sugarcane bagasse doped with aluminum particles for the removal of lead (Pb) from mining wastewater. An experimental approach was employed using a completely randomized design (CRD). The raw material underwent acid hydrolysis followed by doping with aluminum particles (4:1 ratio) through an immersion method. The optimum pH for adsorption was determined to be 6,5. Batch adsorption experiments were conducted at different Pb concentrations (10–150 ppm), and the data were fitted to the Langmuir and Freundlich isotherm models. Statistical analysis (ANOVA) revealed that the hydrolyzed and doped bagasse (BHD) was the most efficient treatment, achieving a maximum removal of 92.85% at 10 ppm Pb(II). The results demonstrate that aluminum doping significantly increases the adsorptive capacity of bagasse, constituting a sustainable and low-cost alternative for Pb(II) removal from mining effluents.
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