TY - JOUR
T1 - Phosphorylated cellulose triacetate-silica composite adsorbent for recovery of heavy metal ion
AU - Srivastava, Niharika
AU - Thakur, Amit K.
AU - Shahi, Vinod K.
N1 - Funding Information:
Instrumental support received from Analytical Science Division, CSMCRI is gratefully acknowledged. One of the authors (N.S.) is thankful to the Department of the Science and Technology for providing DST Woman Scientist fellowship.
Publisher Copyright:
© 2015 Elsevier Ltd. All rights reserved.
PY - 2016/1/20
Y1 - 2016/1/20
N2 - Phosphorylated cellulose triacetate (CTA)/silica composite adsorbent was prepared by acid catalyzed sol-gel method using an inorganic precursor (3-aminopropyl triethoxysilane (APTEOS)). Reported composite adsorbent showed comparatively high adsorption capacity for Ni(II) in compare with different heavy metal ions (Cu2+, Ni2+, Cd2+ and Pb2+). For Ni(II) adsorption, effect of time, temperature, pH, adsorbent dose and adsorbate concentration were investigated; different kinetic models were also evaluated. Thermodynamic parameters such as ΔG°, ΔH°and ΔS°were also estimated and equilibrium adsorption obeyed Langmuir and Freundlich isotherms. Developed adsorbent exhibited about 78.8% Ni(II) adsorption at pH: 6 and a suitable candidate for the removal of Ni(II) ions from wastewater. Further, about 65.5% recovery of adsorbed Ni(II) using EDTA solution was demonstrated, which suggested effective recycling of the functionalized beads would enable it to be used in the treatment of contaminated water in industry.
AB - Phosphorylated cellulose triacetate (CTA)/silica composite adsorbent was prepared by acid catalyzed sol-gel method using an inorganic precursor (3-aminopropyl triethoxysilane (APTEOS)). Reported composite adsorbent showed comparatively high adsorption capacity for Ni(II) in compare with different heavy metal ions (Cu2+, Ni2+, Cd2+ and Pb2+). For Ni(II) adsorption, effect of time, temperature, pH, adsorbent dose and adsorbate concentration were investigated; different kinetic models were also evaluated. Thermodynamic parameters such as ΔG°, ΔH°and ΔS°were also estimated and equilibrium adsorption obeyed Langmuir and Freundlich isotherms. Developed adsorbent exhibited about 78.8% Ni(II) adsorption at pH: 6 and a suitable candidate for the removal of Ni(II) ions from wastewater. Further, about 65.5% recovery of adsorbed Ni(II) using EDTA solution was demonstrated, which suggested effective recycling of the functionalized beads would enable it to be used in the treatment of contaminated water in industry.
KW - Biopolymer adsorbent
KW - Cellulose triacetate (CTA)/silica composite
KW - Metal ions adsorption
KW - Recovery of Ni(II)
UR - http://www.scopus.com/inward/record.url?scp=84945947292&partnerID=8YFLogxK
U2 - 10.1016/j.carbpol.2015.10.047
DO - 10.1016/j.carbpol.2015.10.047
M3 - Article
C2 - 26572476
AN - SCOPUS:84945947292
SN - 0144-8617
VL - 136
SP - 1315
EP - 1322
JO - Carbohydrate Polymers
JF - Carbohydrate Polymers
ER -