Characterization of Pd(II) biosorption in aqueous solution by Shewanella oneidensis MR-1
| Autor: | Haigang Dong, Ling Tan, Yong Xiao, Hao Cui, Xinxing Liu, Hang Xu, Jianping Xie, Haiyan Wu, Meiying Xu, Guanzhou Qiu |
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| Rok vydání: | 2018 |
| Předmět: |
Inorganic chemistry
02 engineering and technology 010501 environmental sciences 01 natural sciences Metal symbols.namesake Adsorption X-ray photoelectron spectroscopy Materials Chemistry Physical and Theoretical Chemistry Fourier transform infrared spectroscopy Shewanella oneidensis Spectroscopy 0105 earth and related environmental sciences Aqueous solution biology Chemistry Biosorption Langmuir adsorption model 021001 nanoscience & nanotechnology Condensed Matter Physics biology.organism_classification Atomic and Molecular Physics and Optics Electronic Optical and Magnetic Materials visual_art symbols visual_art.visual_art_medium 0210 nano-technology |
| Zdroj: | Journal of Molecular Liquids. 255:333-340 |
| ISSN: | 0167-7322 |
| Popis: | This study investigated the potential ability of Shewanella oneidensis MR-1 to recover palladium ion from aqueous solutions. The effect of pH, initial metal ion concentration, contact time and temperature on adsorption of Pd(II) was investigated. The Pd(II) adsorption properties were analyzed through kinetic, isotherm and thermodynamic models. Furthermore, FTIR, SEM-EDS, TEM-EDS, and XPS were applied to evaluate the Pd(II) adsorption mechanisms onto S. oneidensis MR-1. The kinetic data suited pseudo-second order model, indicating the rate-controlling step was chemical adsorption. The equilibrium data were well fitted to Langmuir isotherm model with maximum Pd(II) adsorption capacity of 158.48 mg/g at 50 °C. The thermodynamic results suggested the Pd(II) adsorption process was exothermic and spontaneous. The results of FTIR, SEM-EDS, TEM-EDS, and XPS revealed both biosorption and bioaccumulation occurred in Pd(II) removal process from aqueous solutions. |
| Databáze: | OpenAIRE |
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