Registration Number
2124U014601, Article
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Article, Стаття
Title
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Bordun Ihor
Vasylinych Tamara
Malovanyy Myroslav
Sakalova Halyna
Liubchak Liudmyla
Luchyt Liubov
Сакалова Г. В.
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22-11-2024
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Вінницький національний технічний університет
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https://ir.lib.vntu.edu.ua/handle/123456789/43613
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Elsevier
Description
The article investigates the adsorption of basic (Methylene blue) and acidic (Congo red) dyes by three
types of industrial activated carbon synthesized from natural raw materials. Using the method of
isothermal adsorption/desorption of nitrogen, the porous structure of all types of carbon was studied, and the effect of the size of the adsorbent particles on the adsorption capacity was shown. It
was established that the adsorption isotherms of both dyes can be described using the Langmuir
model. It is assumed that dye molecules are weakly bound to the surface of the carbon material due
to van der Waals and hydrophobic interactions. It is shown that the adsorption of Methylene blue
is significantly greater than the adsorption of Congo red. This is due to the peculiarities of the dissociation of the functional groups of dye molecules, as well as the almost twice the length of Congo
red molecules compared to Methylene blue molecules. It is shown that the boundary amount of
adsorbed Methylene blue allows us to estimate the specific surface area of microporous activated
carbon with high accuracy if the hydrophilicity of the surface of this carbon is taken into account.
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2026-10-21
