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 SM ISO690:2012LUPASCU, Tudor, CIOBANU, Mihail, CULIGHIN, Elena. Absorption of methylene blue from aqueous solutions on activated coal CAN-9: kinetics and equilibrium studies. In: Romanian Journal of Ecology and Environment Chemistry, 2022, nr. 1(4), pp. 22-28. ISSN 2668-5418. DOI: https://doi.org/10.21698/rjeec.2022.102 |
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| Romanian Journal of Ecology and Environment Chemistry | ||||||
| Numărul 1(4) / 2022 / ISSN 2668-5418 /ISSNe 2668-8530 | ||||||
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| DOI:https://doi.org/10.21698/rjeec.2022.102 | ||||||
| Pag. 22-28 | ||||||
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The adsorption of methylene blue and kinetics of its adsorption from aqueous solutions on activated carbon CAN-9, obtained from walnut shells by chemical activation with orthophosphoric acid were studied. It has been shown that methylene blue adsorption isotherm from aqueous solutions on CAN-9 in the linear coordinates of the Langmuir model is a straight line (R = 0.99427) and is of Langmuir type. The kinetics of methylene blue adsorption 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. |
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| Cuvinte-cheie methylene blue, activated carbon, adsorption kinetics, adsorption in static conditions |
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