Sorption mechanism of anionic dyes on pecan nut shells (Carya illinoinensis) using batch and continuous systems

•Biomass derived from pecan nut processing (Carya illinoinensis) is rich in calcium compounds.•The biosorption of acid blue 74, acid blue 25 and reactive blue 4 was studied using as sorbent this calcium-rich biomass.•The sorption mechanism can be related with the calcium cation of biomass and the su...

Full description

Saved in:
Bibliographic Details
Published in:Industrial crops and products 2013-07, Vol.48, p.89-97
Main Authors: Aguayo-Villarreal, I.A., Ramírez-Montoya, L.A., Hernández-Montoya, V., Bonilla-Petriciolet, A., Montes-Morán, M.A., Ramírez-López, E.M.
Format: Article
Language:English
Subjects:
Adsorbents
Adsorption
Biomass
biosorption
calcium
Calcium-rich biomass
Carya illinoinensis
continuous systems
Diffraction
Dyes
Isotherms
Pecan nuts
pecan shells
pecans
proximate composition
Shells
X-ray diffraction
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:•Biomass derived from pecan nut processing (Carya illinoinensis) is rich in calcium compounds.•The biosorption of acid blue 74, acid blue 25 and reactive blue 4 was studied using as sorbent this calcium-rich biomass.•The sorption mechanism can be related with the calcium cation of biomass and the sulphonic groups of the dyes molecules. The biomass derived from pecan nut processing (Carya illinoinensis) for alimentary purpose, specifically the pecan shells were used in this work as a biosorbent of acid blue 74 (AB74), acid blue 25 (AB25) and reactive blue 4 (RB4). This biomass was characterized by ultimate and proximate analysis, FT-IR spectroscopy, X-ray diffraction and SEM/EDX. Adsorption studies were performed in batch and continuous systems and adsorption kinetics, isotherms and breakthrough curves were experimentally determined. Results obtained suggest that the calcium compounds occurring in pecan shells are responsible of the favorable adsorption of anionic dyes, specifically for the removal of AB74. Biosorption results showed that pecan shell is a more suitable adsorbent in dye removal processes using batch configuration rather than packed-bed columns.
ISSN:0926-6690
1872-633X
DOI:10.1016/j.indcrop.2013.04.009