Biosorption of cadmium,copper, lead and zinc by inactive biomass of<Emphasis Type="Italic"> Pseudomonas Putida</Emphasis> |
| |
Authors: | Email author" target="_blank">Rafael?PardoEmail author Mar?Herguedas Enrique?Barrado Marisol?Vega |
| |
Institution: | Departamento de Química Analítica, Universidad de Valladolid, Facultad de Ciencias, Prado de la Magdalena, Spain. rpardo@qa.uva.es |
| |
Abstract: | The accumulation of Cd(II), Cu(II), Pb(II) and Zn(II) at mg L(-1) concentration levels by inactive freeze-dried biomass of Pseudomonas Putida has been investigated. These metals could be efficiently removed from diluted aqueous solutions. A contact time of 10 min was sufficient to reach equilibrium. The pH has a strong effect on metal biosorption and the optimal pH values were 6.0, 5.0-6.0, 6.0-6.5 and 7.0-7.5 for Cd(II), Cu(II), Pb(II) and Zn(II) respectively. Under these conditions there was 80% removal for all metals studied. The process of biosorption can be described by a Langmuir-type adsorption model. This model accounts for 98% of the data variance. The K(A) and q(max) parameters for each metal are strongly correlated (at confidence levels greater than 98%) with the metal acidity, quantified by the constant of the corresponding M(OH)(+) complex, thus confirming previous assertions by other authors. |
| |
Keywords: | |
本文献已被 PubMed SpringerLink 等数据库收录! |
|