Журнал Белорусского государственного университета: Химия (Mar 2020)
Adsorption of cefotaxim sodium on activated carbons of various origin
Abstract
The adsorption of the cephalosporin antibiotic sodium cefotaxime (CEFOT) on two activated carbons in the temperature range 288–313 K was under study. Experimental charcoal AC obtained from hydrolysis lignin was established to be mesoporous. It demonstrates greater CEFOT adsorption activity than the commercially available charcoal OU-A made from wood and characterized by both micro- and mesoporous structure. The surface modification of both activated carbons by a water-soluble polyelectrolyte cellulose acetate sulfate in the form of sodium salt (Na-CAS) leads to an increase in specific adsorption. The multilayer model with saturation (MMS) was used for data analysis. As a result, the number of molecules on the adsorption center, the density of adsorption centers, the total number of formed layers and the energy characteristics of adsorbate – adsorbent interactions at the interface and adsorbate – adsorbate ones within the adsorption layer were estimated.
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