Resumen

PEREZ SILVA, Rosa María; CALZADO LAMELA, Orlindes; CASCARET CARMENATY, Dannis Adrián  y  TUR NARANJO, Enieyis. Cr(VI) adsorption by Cocos nucífera L. in wastewater of fibrocement from Santiago de Cuba. Rev. colomb. biotecnol [online]. 2014, vol.16, n.1, pp.9-18. ISSN 0123-3475.  https://doi.org/10.15446/rev.colomb.biote.v16n1.44183.

Adsorption and/or formation of complexes of heavy metals based on the chemical activity of the biomass, it is the process known as biosorption and it is the base of a new technology for its removal in industrials effluent and its posterior recuperation. In this technology, different kinds of biomasses can be utilized such as: algae, microorganisms and agricultural subproducts. In this work, the adsorption of Cr(VI) was studied utilizing the nutshell of the fruit of the plant Cocos nucífera L as organic biomass. The optimal values of adsorption of Cr(VI) are: pH of 3 units, size of particle smaller than 0.074 mm, doses of adsorbent of 5 g.dm^-3 and contact time of 1 hour. At low values of concentration of the metal (1.0, 1,5 and 1.84 mg.dm^-3) percentage of removal superior to 90% were obtained, however, at high values of concentration (2.5 and 3 mg.dm^-3) values inferior to 90 % are obtained. The process can be studied by the models of both, Langmuir and of Freundlich, because the , coefficient of correlation for these two models was 0.994 and 0.991 respectively. The ions Cr(VI) can be removed at values of 3 and 7 units in a real matrix, reaching removal values of 96.85% and 93.71% respectively.

Palabras clave : biosorption; Cr(VI); vegetal biomass; Langmuir; Freundlich.

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