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Title: Absorption of methylene blue from aqueous solutions on activated coal CAN-9: kinetics and equilibrium studies
Authors: Lupascu, Tudor 
Ciobanu, Mihail 
Culighin, Elena 
Affiliations: Institute of Chemistry (A.S.M) 
Institute of Chemistry (A.S.M) 
Institute of Chemistry (A.S.M) 
Keywords: Methylene blue;Activated carbon;Adsorption kinetics;Adsorption in static conditions
Issue Date: Jun-2022
Publisher: Romanian Journal of Ecology & Environmental Chemistry
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.
Romanian Journal of Ecology & Environmental Chemistry, vol. 4, no. 1, 2022, 22-28,
Appears in Collections:RJEEC, Volume 4, no.1, 2022

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