Izvorni znanstveni članak
https://doi.org/10.13044/j.sdewes.d5.0184
Agroindustrial Waste for Lead and Chromium Biosorption
Susana P. Boeykens
; Facultad de Ingeniería, Laboratorio de Química de Sistemas Heterogéneos (LaQuíSiHe), Universidad de Buenos Aires, Paseo Colon 850, Buenos Aires, Argentina
Andrea Saralegui
; Facultad de Ingeniería, Laboratorio de Química de Sistemas Heterogéneos (LaQuíSiHe), Universidad de Buenos Aires, Paseo Colon 850, Buenos Aires, Argentina
Néstor Caracciolo
; Facultad de Ingeniería, Laboratorio de Química de Sistemas Heterogéneos (LaQuíSiHe), Universidad de Buenos Aires, Paseo Colon 850, Buenos Aires, Argentina
María N. Piol
; Facultad de Ingeniería, Laboratorio de Química de Sistemas Heterogéneos (LaQuíSiHe), Universidad de Buenos Aires, Paseo Colon 850, Buenos Aires, Argentina
Sažetak
There is a need to re-evaluate the residues generated in industrial processes for the production of new raw material, reducing the volume of waste. In this regard, the biosorption is a low-cost alternative method for treating effluents compared to conventional methods. The main objectives of this research were: the evaluation of the biosorbent capacity of six waste materials for the extraction of chromium(VI) and
lead(II) ions from aqueous solutions and, the determination of the adsorption and kinetic parameters for the more efficient system. The materials evaluated were: peanut shell (Arachis hypagaea), sugarcane bagasse (Saccharum officinarum), avocado peel (Persea americana), pecan nutshell (Carya illinoinensis), wheat bran (Triticum aestivum) and
banana peel (Mussa paradisiaca). The highest percentage of lead removal was obtained with wheat bran (89%). For chromium, the percentage was generally much lower compared with lead for all tested biosorbents, the banana peel being the most efficient with a 10% removal. The models that better describe the adsorption processes were: Langmuir and Freundlich. The pseudo-second order kinetic model allowed obtaining the parameters for both systems. The equilibrium time, in both systems, was reached after 60 minutes. The study of Fourier Transformed Infrared spectra and the results of desorption
experiments allowed to hypothesize on the mechanisms involved in the adsorption of these metals.
Ključne riječi
Bioadsorption; Lead; Chromium; Reusing waste material
Hrčak ID:
200966
URI
Datum izdavanja:
30.6.2018.
Posjeta: 989 *