Removal of hexavalent and total chromium from aqueous solution by avocado shell

Eliseo Cristiani-Urbina, Alma Rosa Netzahuatl-Munoz, Maria Del Carmen Cristiani-Urbina

Producción científica: Contribución a una revistaArtículorevisión exhaustiva

5 Citas (Scopus)

Resumen

The main aim of this work was to evaluate the potential of Hass avocado (Persea americana Mill var. 'Hass') shell to remove hexavalent chromium [Cr(VI)] and total chromium from aqueous solutions. Results showed that avocado shell removed Cr(VI) by two different mechanisms: chromium biosorption and bioreduction of Cr(VI) to Cr(III). The capacity for removing Cr(VI) and total chromium gradually increased as the contact time proceeded, reaching values of 101.81 and 61.67 mg g-1 respectively, after 120 h. The opposite behavior was observed concerning the volumetric rates of Cr(VI) and total chromium removal. The pseudo-second order model adequately described the kinetic process of chromium biosorption by avocado shell, which suggests that this process chiefly occurs as a result of chemisorption.

Idioma originalInglés
Páginas (desde-hasta)1339-1344
Número de páginas6
PublicaciónChemical Engineering Transactions
Volumen24
DOI
EstadoPublicada - 2011

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