Articolul precedent |
Articolul urmator |
10 0 |
SM ISO690:2012 PETUHOV, Oleg, TIMBALIUC, Nina, CEBAN (GÎNSARI), Irina, CIBOTARU, Silvia, GONTA, Alexandru, CIOBANU, Mihail, LUPASCU, Tudor, NASTAS, Raisa. Comparative analysis of vegetable activated carbons with commercial ones of granucol series. In: Constructive Design and Technological Optimization in Machine Building Field , 25-27 mai 2021, Bacău. Bacău, Romania: Alma Mater Publishing House of "Vasile Alecsandri" University of Bacau, 2021, Ediția 16, p. 83. ISSN 2457 - 3388. |
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Constructive Design and Technological Optimization in Machine Building Field Ediția 16, 2021 |
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Conferința "Constructive Design and Technological Optimization in Machine Building Field" Bacău, Romania, 25-27 mai 2021 | |||||||
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Pag. 83-83 | |||||||
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Activated carbons have great applicability in the conditioning of wines: discoloration, removal of foreign taste and smell, correction of organoleptic parameters, etc. Nowadays, the most used activated carbons in the winemaking industry are the activated carbons of Granucol series (BI, GE, FA), which are of vegetable origin granulated with the aid of bentonite. The purpose of this work was to compare the structural and sorption characteristics of local vegetal active carbons obtained from apricot stones and nutshells (AC-C and AC-C2, Republic of Moldova) with that of commercial activated carbons (Granucol BI/GE/FA, Germany). The standard methods were used in order to determine the physico-chemical characteristics of activated carbons: the specific surface area, pore size distribution, pore sorption volume, humidity, ash content, bulk density, pH value of suspension and type of surface functional groups. The adsorption capacity of the studied activated carbons was evaluated using methylene blue dye as a reference substance. Equilibrium adsorption data of methylene blue on activated carbons were fitted by using three isotherm models: Langmuir, Freundlich and Sips. In order to analyze the obtained kinetic data three kinetic models: pseudo-first order model, pseudo-second order model, and intraparticle diffusion model were used. According to the obtained results, the local vegetal active carbon (AC-C) has proven to be comparatively effective with commercial ones (Granucol series) in removing methylene blue dye from solutions. |
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Cuvinte-cheie activated carbons, adsorption, Isotherms, Kinetic models, methylene blue, Langmuir, Freundlich, Sips |
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