TY - JOUR
T1 - Removal of arsenic using functionalized cellulose nanofibrils from aqueous solutions
AU - Najib, Nadira
AU - Christodoulatos, Christos
N1 - Publisher Copyright:
© 2018 Elsevier B.V.
PY - 2019/4/5
Y1 - 2019/4/5
N2 - Cellulose nanofibrils (CNF) functionalized by introduction of trimethylammonium chloride were investigated for the uptake of arsenate [As(V)] from aqueous solutions. The modified-CNF was characterized using Energy Dispersive Spectrometry (EDS), argentometric titration, Boehr titration, zeta-potential, Scanning Electron Microscopy (SEM), Fourrier Transform Infrared (FTIR) spectroscopy, Nuclear Magnetic Resonance (NMR) spectroscopy, Brunauer-Emmet-Teller (BET), and Dynamic Light Scattering (DLS). The modified-CNF was effective for As(V) removal from laboratory and field samples. The As(V) adsorption was rapid and equilibrium was attained within two hours. The kinetic data were adequately described by the pseudo-second-order kinetics model suggesting that As(V) adsorption onto modified-CNF involves electrostatic forces and bonds between As(V) and adsorption sites. The adsorption isotherm data were well correlated with model. The modified-CNF exhibited an As(V) adsorption capacity (qe) of approximately 25.5 mg g−1. Competitive adsorption between As(V) and anions including NO2−, NO3−, and SO42− was investigated and the results showed negligible influence on As(V) removal. However, PO43− presence slightly reduced As(V) adsorption. Thermodynamics study showed that the As(V) adsorption onto modified-CNF is temperature dependent and is spontaneous and exothermic. Overall, the results of this study demonstrated that modified-CNF offers a propitious alterative for As(V) removal from water.
AB - Cellulose nanofibrils (CNF) functionalized by introduction of trimethylammonium chloride were investigated for the uptake of arsenate [As(V)] from aqueous solutions. The modified-CNF was characterized using Energy Dispersive Spectrometry (EDS), argentometric titration, Boehr titration, zeta-potential, Scanning Electron Microscopy (SEM), Fourrier Transform Infrared (FTIR) spectroscopy, Nuclear Magnetic Resonance (NMR) spectroscopy, Brunauer-Emmet-Teller (BET), and Dynamic Light Scattering (DLS). The modified-CNF was effective for As(V) removal from laboratory and field samples. The As(V) adsorption was rapid and equilibrium was attained within two hours. The kinetic data were adequately described by the pseudo-second-order kinetics model suggesting that As(V) adsorption onto modified-CNF involves electrostatic forces and bonds between As(V) and adsorption sites. The adsorption isotherm data were well correlated with model. The modified-CNF exhibited an As(V) adsorption capacity (qe) of approximately 25.5 mg g−1. Competitive adsorption between As(V) and anions including NO2−, NO3−, and SO42− was investigated and the results showed negligible influence on As(V) removal. However, PO43− presence slightly reduced As(V) adsorption. Thermodynamics study showed that the As(V) adsorption onto modified-CNF is temperature dependent and is spontaneous and exothermic. Overall, the results of this study demonstrated that modified-CNF offers a propitious alterative for As(V) removal from water.
KW - Adsorption
KW - Arsenic
KW - Cellulose
KW - Functionalized
KW - Nanofibrils
KW - Trimethylammonium
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U2 - 10.1016/j.jhazmat.2018.12.067
DO - 10.1016/j.jhazmat.2018.12.067
M3 - Article
C2 - 30594725
AN - SCOPUS:85059127725
SN - 0304-3894
VL - 367
SP - 256
EP - 266
JO - Journal of Hazardous Materials
JF - Journal of Hazardous Materials
ER -