TY - JOUR
T1 - Adsorption of Cadmium Using Biochars Produced from Agro-Residues
AU - López, Julián E.
AU - Builes, Santiago
AU - Heredia Salgado, Mario A.
AU - Tarelho, Luís A.C.
AU - Arroyave, Catalina
AU - Aristizábal, Adriana
AU - Chavez, Eduardo
N1 - Funding Information:
This research was supported by the project FOOD/2016/380-060 granted by European Union and implemented by CEFA/GIZ. Chemical analyses were funded by Universidad Estatal de Milagro, UNEMI (OCAS-2016). This work was supported by COLCIENCIAS though resources from “El Patrimonio Autónomo Fondo Nacional de Financiamiento para la Ciencia, la Tecnología y la Innovación Francisco José de Caldas” (Project No. CD120680863411). The authors acknowledge financial support from Universidad de Medellín and Vicerrectorı́a de Descubrimiento y Creación of Universidad EAFIT. J.E.L. thanks Universidad de Medellín for the Scholarship No. 321316/427405. Thanks are due for the financial support to CESAM (UID/AMB/50017/2019), to FCT/MCTES, Portugal, through national funds, and the cofunding by the FEDER, within the PT2020 Partnership Agreement and Compete 2020.
Publisher Copyright:
Copyright © 2020 American Chemical Society.
PY - 2020/7/9
Y1 - 2020/7/9
N2 - Biochars have been shown as promising materials for cadmium remediation. However, the different precursors and the pyrolysis process operating conditions can yield very different surface functional groups, and as a result, different cadmium sorption mechanisms can be observed in biochars. Herein we present the results of cadmium sorption on biochars produced from the pyrolysis of different agro-residues, namely, coffee husk, quinoa straw, and oil palm kernel shell. The adsorption isotherms were used to determine the influence of the biochar's physicochemical characteristics to their sorption behavior. The biochars prepared from quinoa residues showed much higher cadmium uptakes than the other biochars. The concentration of base cations was found to be a critical factor for cadmium sorption. Although the quinoa biochars presented large uptakes, it was found that base cations were supported on the biochars and could be removed by leaching. Results from this study suggest that concentration of base cations on biochars could be used as predictors of the biochar capabilities for the removal of cadmium in aqueous solution.
AB - Biochars have been shown as promising materials for cadmium remediation. However, the different precursors and the pyrolysis process operating conditions can yield very different surface functional groups, and as a result, different cadmium sorption mechanisms can be observed in biochars. Herein we present the results of cadmium sorption on biochars produced from the pyrolysis of different agro-residues, namely, coffee husk, quinoa straw, and oil palm kernel shell. The adsorption isotherms were used to determine the influence of the biochar's physicochemical characteristics to their sorption behavior. The biochars prepared from quinoa residues showed much higher cadmium uptakes than the other biochars. The concentration of base cations was found to be a critical factor for cadmium sorption. Although the quinoa biochars presented large uptakes, it was found that base cations were supported on the biochars and could be removed by leaching. Results from this study suggest that concentration of base cations on biochars could be used as predictors of the biochar capabilities for the removal of cadmium in aqueous solution.
UR - http://www.scopus.com/inward/record.url?scp=85089280277&partnerID=8YFLogxK
U2 - 10.1021/acs.jpcc.0c02216
DO - 10.1021/acs.jpcc.0c02216
M3 - Artículo
AN - SCOPUS:85089280277
SN - 1932-7447
VL - 124
SP - 14592
EP - 14602
JO - Journal of Physical Chemistry C
JF - Journal of Physical Chemistry C
IS - 27
ER -