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

• 来源期刊: 材料科学技术（英文版）
• 年，卷（期）: 2018,（5）
• 页码范围: 855-863
• 页数: 9页
• 语种: 英文

摘要

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 161.78 mgg-1 for Pb2+ and 83.26 mgg-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.