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| Titel: |
Biosorption of Lead (II) Ions From Aqueous Solutions by Biological Activated Dates Stems |
| Auteur: |
Hynda Yazid Rachida Maachi |
| Verschenen in: |
Journal of environmental science and technology |
| Paginering: | Jaargang 1 (2008) nr. 4 pagina's 201-213 |
| Jaar: |
2008 |
| Inhoud: |
In this research, we investigated a biological activation method of dates stems, an abundant agricultural wast by-Product in Algeria, to improve there biosorption capacity for lead (II) ions. Batch experiments were carried out to determine Pb2+ sorption capacity and the efficiency of the sorption process under different pH, contact time, initial Pb2+, dates stems concentrations and temperature. The biosorption capacity was found to increase in the five parameters studied. The biosorption for Pb2+onto activated dates stems obeys to the Langmuir and Freundlich isotherms models. Three kinetic models are the pseudo-first-order, pseudo-second-order and intraparticle diffusion model were selected to interpret the biosorption data. Kinetic parameters and related coefficients, for each cognatic were calculated and discussed. It was indicated that the biosorption for Pb2+ onto activated dates stems could be described by the pseudo-second-order kinetic. Various thermodynamic parameters such as standard enthalpy (?H°), standard entropy (?S°) ans standard free energy (?G°) were evaluated. |
| Uitgever: |
Asian Network for Scientific Information (provided by DOAJ) |
| Bronbestand: |
Elektronische Wetenschappelijke Tijdschriften |
Details van artikel 3 van 9 gevonden artikelen
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