TY - JOUR
T1 - Preparation, characterization, and adsorption kinetics of graphene oxide/chitosan/carboxymethyl cellulose composites for the removal of environmentally relevant toxic metals
AU - Rahaman, Md Hafezur
AU - Islam, Md Rakibul
AU - Islam, Rafiquel
AU - Alam, S. M.Nur
AU - Rahman, Md Safiur
AU - Rahman, Md Aminur
AU - Begum, Bilkis A.
N1 - Copyright © 2023 Elsevier B.V. All rights reserved.
PY - 2024/2/1
Y1 - 2024/2/1
N2 - This study attempted to develop a low-cost and eco-friendly bio-based composite adsorbent that is highly efficient in capturing potential toxic metals. The bio-composite adsorbent was prepared using graphene oxide (GO), carboxymethyl cellulose (CMC) and chitosan (CS); and characterized using FTIR, SEM-EDX and WAXD techniques. Metal-ion concentration in an aqueous solution was measured by ICP-OES. This article reveals that the adsorption of heavy metal ions varied according to the adsorbent quantity, initial metal concentration, pH, and interaction time. The metal ions' adsorption capacity (mg/g) was observed to increase when the interaction time and metal concentration increased. Conversely, metal ions adsorption was decreased with an increase in adsorbent dosages. The effect of pH on metal ions' adsorption was ion-specific. The substantial adsorption by GO/CMC/CS composite for Co2+, CrO42−, Mn2+ and Cd2+, had the respective values of 43.55, 77.70, 57.78, and 91.38 mg/g under acidic conditions. The metal ions experimental data were best fitted with pseudo-second-order (PSO) kinetics, and Freundlich isotherm model (except Co2+). The separation factors (RL) value in the present investigation were found between 0 and 1, meaning that the metal ions adsorption onto GO/CS/CMC composite is favorable. The RL and sorption intensity (1/n) values fitted well to the adsorption isotherm.
AB - This study attempted to develop a low-cost and eco-friendly bio-based composite adsorbent that is highly efficient in capturing potential toxic metals. The bio-composite adsorbent was prepared using graphene oxide (GO), carboxymethyl cellulose (CMC) and chitosan (CS); and characterized using FTIR, SEM-EDX and WAXD techniques. Metal-ion concentration in an aqueous solution was measured by ICP-OES. This article reveals that the adsorption of heavy metal ions varied according to the adsorbent quantity, initial metal concentration, pH, and interaction time. The metal ions' adsorption capacity (mg/g) was observed to increase when the interaction time and metal concentration increased. Conversely, metal ions adsorption was decreased with an increase in adsorbent dosages. The effect of pH on metal ions' adsorption was ion-specific. The substantial adsorption by GO/CMC/CS composite for Co2+, CrO42−, Mn2+ and Cd2+, had the respective values of 43.55, 77.70, 57.78, and 91.38 mg/g under acidic conditions. The metal ions experimental data were best fitted with pseudo-second-order (PSO) kinetics, and Freundlich isotherm model (except Co2+). The separation factors (RL) value in the present investigation were found between 0 and 1, meaning that the metal ions adsorption onto GO/CS/CMC composite is favorable. The RL and sorption intensity (1/n) values fitted well to the adsorption isotherm.
KW - Adsorption
KW - Batch adsorption
KW - Bio-composite
KW - Carboxymethyl cellulose
KW - Chitosan
KW - Graphene oxide
KW - Water Pollutants, Chemical/analysis
KW - Ions
KW - Water/chemistry
KW - Graphite
KW - Carboxymethylcellulose Sodium/chemistry
KW - Kinetics
KW - Chitosan/chemistry
KW - Hydrogen-Ion Concentration
UR - http://www.scopus.com/inward/record.url?scp=85178496659&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=85178496659&partnerID=8YFLogxK
UR - https://www.mendeley.com/catalogue/a6a40879-fa83-3889-a050-5e43e44568a6/
U2 - 10.1016/j.ijbiomac.2023.128357
DO - 10.1016/j.ijbiomac.2023.128357
M3 - Article
C2 - 38035970
AN - SCOPUS:85178496659
SN - 0141-8130
VL - 257
JO - International Journal of Biological Macromolecules
JF - International Journal of Biological Macromolecules
IS - Pt 1
M1 - 128357
ER -