Premium
Amino‐functionalized material from a bio‐template for silver adsorption: process evaluation in batch and fixed bed
Author(s) -
RomeroCano Luis A,
GarcíaRosero Helena,
del OlmoIruela Monsalud,
CarrascoMarín Francisco,
GonzálezGutiérrez Linda V
Publication year - 2019
Publication title -
journal of chemical technology and biotechnology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.64
H-Index - 117
eISSN - 1097-4660
pISSN - 0268-2575
DOI - 10.1002/jctb.5806
Subject(s) - adsorption , aqueous solution , melamine , desorption , chemistry , urea , chromatography , chemical engineering , metal , materials science , organic chemistry , engineering
Abstract BACKGROUND The modification of an organic matrix as a bio‐template (grapefruit peel) using urea and melamine was carried out to introduce amino groups on its surface and favor Ag(I) adsorption in aqueous solution for metal recovery. RESULTS Adsorption capacity in batch mode was proportional to the nitrogen content within the adsorbents, the maximum being the one obtained with the adsorbent functionalized with urea, 72.33 mg g −1 , which was tested as a fixed bed in a column to evaluate the metal adsorption in a continuous flow model. The adsorption capacity of the fixed bed was 15.14 mg g −1 , and its use was proved over three adsorption–desorption cycles. CONCLUSION Amino‐functionalized adsorbent achieved a high Ag + uptake capacity; from the characterization it is proposed that the adsorption mechanism consists in the formation of the complex R‐NH 2 Ag + and R‐COOAg. © 2018 Society of Chemical Industry