Amino-functionalized magnetic bacterial cellulose/activated carbon composite for Pb2+ and methyl orange sorption from aqueous solution

• Published in: Journal of materials science & technology Vol. 34; no. 5; pp. 855 - 863
• Main Authors: Huang, Xiaogui, Zhan, Xiaozhang, Wen, Cuilian, Xu, Feng, Luo, Lijin
• Format: Journal Article
• Language: English
• Published: Elsevier Ltd 01-05-2018
• Subjects: Activated carbon; Adsorption; Bacterial cellulose; Methyl orange; Pb2; Pb2; Bacterial cellulose; Adsorption; Methyl orange; Activated carbon
• ISSN: 1005-0302; 1941-1162
• DOI: 10.1016/j.jmst.2017.03.013

A new nanostructured amino-functionalized magnetic bacterial cellulose/activated carbon (BC/AC) composite bioadsorbent (AMBCAC) was prepared for removal of Pb2+ and methyl orange (MO) from aqueous solution. The results demonstrated that the equilibrium adsorption capacity (qe) for Pb2+ obviously increases by 2.14 times after introduction of amino groups, the optimum pH for Pb2+ and MO adsorption was 5.0 and 3.0, respectively, and the qe of AMBCAC was 161.78mgg−1 for Pb2+ and 83.26mgg−1 for MO under the optimal conditions in this investigation. The kinetics and adsorption isotherm data of the sorption process were well fitted by pseudo-second-order kinetic model and Langmuir isotherm respectively. The thermodynamic results (the Gibbs free energy change ΔG<0, the enthalpy change ΔH>0, the entropy change ΔS>0) implied that the adsorption process of Pb2+ and MO was feasible, endothermic and spontaneous in nature. These results support that the AMBCAC composite developed in this work can provide a cheap and efficient way for easy removal of both Pb2+ and MO as a promising adsorbent candidate for wastewater treatment.