Evaluación de la capacidad de bioadsorción de Pb (II) y Cd (II) presentes en soluciones sintéticas independientes empleando retamo espinoso (Ulex Europaeus) como adsorbente
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Despite existence of current laws and different treatments designed for heavy metal removal, presence of heavy metals as lead (II) and cadmium (II) in the riverbeds has been increasing because of the industrial development causing several impacts on ecosystems and elevating risk of affecting human health owing to their potential accumulation into live organisms. On the other hand, the gorse Ulex europeaus invasion has been a national issue with ecological and economic consequences, as a result of its rampant spread and the difficulty of restoring disturbed areas. For that reason, the aim of the present study was to evaluate the biosorption capacity of lead (II) and cadmium (II) from synthetic independent solutions by gorse dry biomass, as innovative, low cost and effective technology for heavy metal removal from industrial wastewater. In this sense, the maximum Biosorption capacity values from batch adsorption experiments were 16.75 mg/g for lead and 11.44mg/g for cadmium, whereas the maximum metal uptake were 84.55% and 82.20% for lead and cadmium respectively. Likewise, Langmuir isotherm model providing best fit for both metal ions which values of R^2 were 0.903 for lead and 0.965 for cadmium. Furthermore, on the experiment´s column phase it was found that increasing from 5 to 15 cm the column bed height for both metal ions, the service times were 45 min and 20 min longer for lead and cadmium. Subsequently, BDST (Best Depth Service Time) model fitted experimental data, with lead providing the best fit which R^2 value was 0.99. As a result of the present study, gorse dry biomass is suitable candidate for lead (II) and cadmium (II) Biosorption process from synthetic independent solutions.