Investigation of organic dyes adsorption on activated carbon
Journal Title: Екологічні науки - Year 2018, Vol 22, Issue
Abstract
The adsorption of methylene blue, bromotymol blue and indigo carmine by activated carbon was investigated by spectrophotometric analysis method. Obtained adsorption isotherms were modeled by Langmuir and Dubinin-Radushkevich equations. Based on the analysis of the modeling results, it was established that the presence of mesopores in activated carbon material along with the developed microporous structure contributes to an increase in the adsorption capacity of carbon in aqueous solutions, especially in cases of large molecules adsorption. The existence of a mesopores allows adsorbates to gain access to micropores that contain adsorption centers with higher energy for adsorption. This is confirmed by the large values of both the equilibrium constant and the values of the adsorption energy determined from the Langmuir and Dubinin-Radushkevich equations, respectively.
Authors and Affiliations
І. М. Бордун, В. В. Пташник, В. О. Чумакевич, О. А. Машков
Keywords
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