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Cobalt Biosorption on Thermally Activated Cicer arietinum Husk Activated Carbon: Isotherm, Kinetic, and Thermodynamic Study |
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| รหัสดีโอไอ | |
| Creator | Sushma |
| Title | Cobalt Biosorption on Thermally Activated Cicer arietinum Husk Activated Carbon: Isotherm, Kinetic, and Thermodynamic Study |
| Contributor | Amit Keshav, Manivannan Ramachandran |
| Publisher | Thai Society of Higher Education Institutes on Environment |
| Publication Year | 2569 |
| Journal Title | EnvironmentAsia |
| Journal Vol. | 19 |
| Journal No. | 2 |
| Page no. | 34-46 |
| Keyword | Adsorption, Chickpea husk, Cobalt, Isotherm study, Kinetic study |
| URL Website | http://www.tshe.org/ea/index.html |
| Website title | EnvironmentAsia |
| ISSN | 1906-1714 |
| Abstract | This research focused on generating activated carbon from chickpea (CP); Cicer arietinum,husks via thermal activation and on investigating its potential to eliminate Co2+ from aqueouswastewater. Cobalt is widely used in integrated circuit fabrication and energy storage devices.Characterisation of the chickpea husk-activated carbon (CPAC) was performed using FTIR,EDX, SEM, BET, TGA, XRD, and CHNS/O analyses. After the adsorption experiment, theEDX analysis of the adsorbent confirmed the existence of cobalt. The FTIR study demonstratedthat cobalt ion adsorption occurs via functional moieties, like -NH2, carboxylic, alkyl, andaromatic groups, present on the adsorbent. The adsorption process is prejudiced by solutionpH and shadows a pseudo-2nd-order kinetic model. Different isotherms, such as the Freundlich,Langmuir, and Temkin isotherms, were investigated in this study. Among all the isotherms, theFreundlich isotherm model fitted best. Adsorption thermodynamics revealed that the processoccurred spontaneously and released heat, indicating an endothermic nature. The adsorptiontests performed at ~303 K and pH 7 demonstrated that cobalt ions could be adsorbed to ~272mg/g, with a maximum Co removal of nearly 96% at a CPAC quantity of 0.1 g and an originalCo concentration of 500 mg/L. Based on the results, the CPAC proved to be a likely, inexpensiveadsorbent for Co elimination. |
