Preparation, characterization, and adsorption kinetics of graphene oxide/chitosan/carboxymethyl cellulose composites for the removal of environmentally relevant toxic metals

被引:29
作者
Rahaman, Md. Hafezur [1 ]
Islam, Md. Rakibul [1 ]
Islam, Rafiquel [1 ]
Alam, S. M. Nur [2 ]
Rahman, Md. Safiur [3 ]
Rahman, Md. Aminur [4 ]
Begum, Bilkis A. [3 ]
机构
[1] Islamic Univ, Dept Appl Chem & Chem Engn, Kushtia 7003, Bangladesh
[2] Jashore Univ Sci & Technol, Dept Chem Engn, Jashore 7408, Bangladesh
[3] Bangladesh Atom Energy Commiss, Atom Energy Ctr AECD, Dhaka 1000, Bangladesh
[4] Zonal Lab, Dept Publ Hlth Engn, Khulna 9100, Bangladesh
关键词
Graphene oxide; Carboxymethyl cellulose; Chitosan; Bio-composite; Adsorption; Batch adsorption; AQUEOUS-SOLUTION; MICROCRYSTALLINE CELLULOSE; HEXAVALENT CHROMIUM; WASTE-WATER; OXIDE; IONS; ADSORBENT; COPPER; LEAD; ISOTHERMS;
D O I
10.1016/j.ijbiomac.2023.128357
中图分类号
Q5 [生物化学]; Q7 [分子生物学];
学科分类号
071010 ; 081704 ;
摘要
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 inves-tigation 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.
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页数:13
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