Biosorption of lead(II) from aqueous solution by lactic acid bacteria
| Autor: | C. B. Jiang, B. L. Li, Q. H. Dai, R. Li, X. Y. Bian, J. M. Ge, J. Ou |
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| Rok vydání: | 2019 |
| Předmět: |
Langmuir
Environmental Engineering 010501 environmental sciences 01 natural sciences Endothermic process 03 medical and health sciences Adsorption Physisorption Lactobacillales Freundlich equation 030304 developmental biology 0105 earth and related environmental sciences Water Science and Technology 0303 health sciences Aqueous solution Chemistry Biosorption Hydrogen-Ion Concentration Solutions Kinetics Biodegradation Environmental Lead Chemisorption Thermodynamics Water Pollutants Chemical Nuclear chemistry |
| Zdroj: | Water science and technology : a journal of the International Association on Water Pollution Research. 79(4) |
| ISSN: | 0273-1223 |
| Popis: | The biosorption of Pb(II) from aqueous solutions by lactic acid bacterium, Lactobacillus brevis, was studied. The effects of initial pH, contact time, initial Pb(II) concentration, bacterial concentration, rotation speed and temperature of biosorption of Pb(II) from aqueous solutions were investigated. The optimal condition for Pb2+ ions adsorption was observed at pH 6, with the rotational speed of 120 rpm.min−1, bacterial concentration of 3 g.L−1, temperature of 40 °C and contact time of 12 h. The correlation regression coefficients showed that the biosorption process can be well fitted with the Redlich-Peterson, Langmuir, Freundlich and Temkin isotherm models. The equilibrium adsorption capacity reached 53.632 mg.g−1. Binding energy value was 0.264 kJ/mol, which indicated that the adsorption process seemed to involve chemisorption and physisorption. Kinetics of adsorption was found to fit well with the pseudo-second-order and Elovich kinetic equations. Thermodynamic parameters revealed the feasibility, spontaneity and endothermic nature of adsorption. |
| Databáze: | OpenAIRE |
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