TY - JOUR
T1 - Biosorption of Ni(II) from aqueous solutions by Litchi chinensis seeds
AU - Flores-Garnica, Jonathan Gonzalo
AU - Morales-Barrera, Liliana
AU - Pineda-Camacho, Gabriela
AU - Cristiani-Urbina, Eliseo
PY - 2013/5
Y1 - 2013/5
N2 - The potential of Litchi chinensis seeds (LCS) for biosorption of Ni(II) ions from aqueous solutions was investigated in batch systems in terms of kinetics, equilibrium and thermodynamics. Experimental data showed that the biosorption capacity of LCS was dependent on operating variables such as solution pH, initial Ni(II) concentration, contact time, and temperature. The optimum pH value for Ni(II) biosorption was 7.5. Significant enhancement of Ni(II) biosorption was observed by increasing initial metal concentration and temperature. Modeling of sorption kinetics showed good agreement of experimental data with the pseudo-second-order kinetic model. Langmuir model exhibited the best fit to experimental data. According to this isotherm model, the maximum Ni(II) biosorption capacity of LCS is 66.62mgg-1. The calculated thermodynamic parameters showed that the biosorption of Ni(II) ions is an endothermic and non-spontaneous process. Results indicate that LCS can be used as an effective and environmentally friendly biosorbent to detoxify Ni(II)-polluted wastewaters.
AB - The potential of Litchi chinensis seeds (LCS) for biosorption of Ni(II) ions from aqueous solutions was investigated in batch systems in terms of kinetics, equilibrium and thermodynamics. Experimental data showed that the biosorption capacity of LCS was dependent on operating variables such as solution pH, initial Ni(II) concentration, contact time, and temperature. The optimum pH value for Ni(II) biosorption was 7.5. Significant enhancement of Ni(II) biosorption was observed by increasing initial metal concentration and temperature. Modeling of sorption kinetics showed good agreement of experimental data with the pseudo-second-order kinetic model. Langmuir model exhibited the best fit to experimental data. According to this isotherm model, the maximum Ni(II) biosorption capacity of LCS is 66.62mgg-1. The calculated thermodynamic parameters showed that the biosorption of Ni(II) ions is an endothermic and non-spontaneous process. Results indicate that LCS can be used as an effective and environmentally friendly biosorbent to detoxify Ni(II)-polluted wastewaters.
KW - Isotherm
KW - Kinetics
KW - Litchi chinensis seed
KW - Ni(II) biosorption
KW - Thermodynamics
UR - http://www.scopus.com/inward/record.url?scp=84876333321&partnerID=8YFLogxK
U2 - 10.1016/j.biortech.2013.02.059
DO - 10.1016/j.biortech.2013.02.059
M3 - Artículo
C2 - 23567741
SN - 0960-8524
VL - 136
SP - 635
EP - 643
JO - Bioresource Technology
JF - Bioresource Technology
ER -