Articles - Leather Technology Magazine Nš80
Blanca H. Hintermeyer1, Silvana A. Muratona1,2, Eduardo L. Tavani2,*
1 Facultad de Ingeniería y Ciencias Económico-Sociales de la Universidad Nacional de San Luis, 25 de Mayo 384, (D5730EKQ) Villa Mercedes, San Luis, Argentina
2 Centro de Tecnología de Recursos Minerales y Cerámica
(CETMIC), Comisión de Investigaciones Científicas de la Provincia
de Buenos Aires, CONICET, Camino Centenario y 506, C.C.
49, (B1897ZCA) M.B. Gonnet, Argentina
*E-mail: etavani@netverk.com.ar
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Analysis of the adsorption process
applied to the removal of chromium(III)
dissolved in wastewaters from tanneries
Keywords: chromium(III), adsorption, wastewaters from tanneries,
clay, zeolite, activated carbon, chitosan, alga, fungus.
ABSTRACT
Data published on the capacity of twelve adsorbents to remove
the chromium(III) contained in wastewaters from tanneries
were analyzed. The review included a detailed description of
the main physicochemical characteristics of the adsorbents,
highlighting those aspects that make it possible to explain
the mechanism through which the separation occurs. Subsequently,
whether the electric charge and the size of a complex
ion affect the yield of the process was examined. The results
compiled showed that the electric charge is the property of
greatest incidence on the attraction force of the chromium(III)
bearing species. According to the fact that the substance used
in the tannage is mainly a dimer and the practical interest of
its presence in the medium studied, it was decided to focus on
treatments that were carried out only with industrial effluents.
To conclude, the amounts of chromium(III) retained per gram
of each adsorbent were compared. The highest removal was
185.9 mg/g and it was obtained with an acidophilic fungi from
the neutralization liquid.
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