Resumo

HODELIN-BARRERA, Radames; BESSY-HORRUITINER, Taimi; CALZADO-LAMELA, Orlindes  e  PEREZ-SILVA, Rosa María. Chromium (VI) and lead (II) adsorption about biomass of Kluyveromyces marxianus CCEBI 2011. Rev Cub Quim [online]. 2022, vol.34, n.1, pp. 111-130.  Epub 18-Fev-2022. ISSN 2224-5421.

Adsorption minimizes the generation of toxic waste and the recovery of metal. The objective of the work was to study the bioadsorption of chromium (VI) and lead (II) using dry biomass of the strain Kluyveromyces marxianus CCEBI 2011. It was worked at different pH values ​​and concentration levels. The determination of the chemical-physical parameters was carried out at the Geominera Oriente Company. Adsorption isotherms were carried out by the Langmuir, Freundlich and Dubinin-Radushkevich models, resulting in that the maximum bioadsorption capacity of chromium (VI) and lead (II) by biomass was 0,89 and 4,61 mg g-1, respectively. the removal percentages being greater than 90%. The mean adsorption free energy values ​​obtained from the Dubinin-Radushkevich model in chromium (VI) and lead (II) were 10 000 and 15 811,4 kJ mol-1, respectively, showing that for these experimental conditions the adsorption process is of chemical nature.

Palavras-chave : adsorption; Kluyveromyces marxianus; chromium (VI); lead (II).

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