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Adsorption kinetic of Acinetobacter baylyi for Cr (VI) removalunder acidic condition |
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| รหัสดีโอไอ | |
| Creator | 1. Jittima Charoenpanich 2. Anongnart Khotthong 3. Jutamas Pantab 4. Noppamart Thasurin 5. Supattra Chumjam |
| Title | Adsorption kinetic of Acinetobacter baylyi for Cr (VI) removalunder acidic condition |
| Publisher | Research and Development Office, Prince of Songkla University |
| Publication Year | 2565 |
| Journal Title | Songklanakarin Journal of Science an Technology (SJST) |
| Journal Vol. | 44 |
| Journal No. | 3 |
| Page no. | 584-593 |
| Keyword | biosorption, hexavalent chromium, Acinetobacter baylyi, kinetic model, isotherm study |
| URL Website | https://rdo.psu.ac.th/sjst/index.php |
| ISSN | 0125-3395 |
| Abstract | Dried cell of a new strain, known as Acinetobacter baylyi, showed appropriate biological removal of Cr (VI) underacidic condition. The adsorption parameters optimised were: biomass dose (2.0 g/L), initial pH (2.0), agitation speed (250 rpm),initial Cr (VI) concentration (10โ"60 mg/L), temperature (30 ๏ฐC), and time (72 h). The experimental data in the 20โ"60 mg/LCr(VI) concentration range fitted well to the Langmuir isotherm (R2 = 0.9545, maximum capacity 11.96 mg/g) and pseudosecond-order adsorption model. The adsorption mechanism was best described by the Boyd plot and an intraparticle diffusionmodel. TEM-EDX studies revealed that the noticeable chromium precipitates on bacterial surfaces and within the bacterial innerportions after Cr (VI) adsorption. An XPS study recommended that this bacterium use carbonyl/hydroxy/carboxy groups on thesurface for adsorption of Cr (VI). |
