Resumo

PARRA-REYES, JAIME-ANDRÉS;  e  PEREZ, EDIER-HUMBERTO;. Estimation of residual lignocellulosic materials as adsorbents of chromium and lead. Rev.Bio.Agro [online]. 2023, vol.21, n.1, pp.18-27.  Epub 01-Jul-2023. ISSN 1692-3561.  https://doi.org/10.18684/rbsaa.v21.n1.2023.1610.

Residual lignocellulosic materials can be used as adsorbents for heavy metals present in water, promoting the adsorption of metal ions on the surface and active sites of biomaterials, resulting in a low-cost and efficient removal. In this case, the residues from the agroindustrial use of the fique (Furcraea macrophilla) and the agricultural process of the corn maize (Zea mays) were studied as adsorbing phases of chromium and lead metals, in order to assess their capacity as biosorbents of these metals present in water samples, determined by equilibrium time, type of isotherm and maximum adsorption capacity; finding that in a time of 12 hours, the fique fiber has an adsorption capacity of Cr and Pb of 7,81 ± 1,40 mg/g and 169,51 ± 1,37 mg/g respectively, observing, a form of Freundlich type adsorption isotherm; while the corn layer fiber has an adsorption capacity of 13,35 ± 3,28 mg/g for chromium and 15,01 ± 3,47 mg/g for lead, showing a behavior in its Langmuir-type adsorption isotherm , concluding that both fibers have potential for the removal of the metals studied, especially the fiber of fique.

Palavras-chave : Adsorption; Metals; Fique; Maize; Lignocellulosic; materials; Freundlich; Langmuir; Remotion; Contamination; Biomaterials.

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