Absorption of methylene blue from aqueous solutions on activated coal CAN-9: kinetics and equilibrium studies
| Autor: | Tudor Lupascu, Mihail Ciobanu, Elena Culighin |
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| Jazyk: | angličtina |
| Rok vydání: | 2022 |
| Předmět: | |
| Zdroj: | Romanian Journal of Ecology & Environmental Chemistry, Vol 4, Iss 1, Pp 22-28 (2022) |
| Druh dokumentu: | article |
| ISSN: | 2668-5418 2668-8530 |
| DOI: | 10.21698/rjeec.2022.102 |
| Popis: | The adsorption of methylene blue and the kinetics of adsorption of aqueous solutions on activated carbon CAN-9, obtained from walnut shells by chemical activation with orthophosphoric acid were studied. It has been shown that the adsorption isotherm of methylene blue from aqueous solutions on CAN-9 in the linear coordinates of the Langmuir model is a straight line (R = 0.99427) and is of the Langmuir type. The kinetics of adsorption of methylene blue on CAN-9, measured at two initial concentrations, showed an increase in Kint and C values with the increase of the initial concentrations. The process of intra-particular diffusion occurs in only one stage and takes place in the mesopores. |
| Databáze: | Directory of Open Access Journals |
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