Preparation of sodium alginate-carboxymethyl cellulose-graphene oxide composite aerogel for adsorption of Pb(II) ion

被引：0
作者：
Tian T. [1 ]
Fu Y. [1 ]
Guan L. [1 ]
Wang Y. [1 ]
Zhou J. [1 ]
机构：
[1] School of Chemistry and Chemical Engineering, Xi'an University of Architecture and Technology, Xi'an
来源：
Fuhe Cailiao Xuebao/Acta Materiae Compositae Sinica | 2023年 / 40卷 / 10期
基金：
中国国家自然科学基金;
关键词：
adsorption; aerogel; carboxymethyl cellulose; graphene oxide; sodium alginate;
D O I：
10.13801/j.cnki.fhclxb.20230314.001
中图分类号：
学科分类号：
摘要：
Exploiting adsorbents with excellent adsorption activity, good durability and environment friendly is still the core focus of water pollution treatment. Herein, in this study, sodium alginate (SA), carboxymethyl cellulose (CMC), and graphene oxide (GO) were used as raw materials to frame a SA-CMC-GO composite aerogel with a 3D network structure by a sol-gel and freeze-drying method. The functional group structure and microstructure of SA-CMC-GO composite aerogel were tested and analyzed by SEM, FTIR and XRD. Various parameters affecting the removal of Pb2+ such as pH, temperature and contact time were optimized by using a series of batch adsorption experiments. The results show that the adsorption amount of Pb2+ by the composite aerogel increases with the increase of pH=2-5. The adsorption process is a spontaneous exothermic process and the experimental data of the adsorption process are more fitted to Langmuir isotherm, the theoretical maximum adsorption capacity of Pb2+ on SA-CMC-GO composite aerogel is 272.5 mg·g−1. Adsorption kinetics studies indicate the adsorption of Pb2+ by the SA-CMC-GO composite aerogel shows rapid uptake rates and reaches equilibrium within 60 min. The pseudo-second-order kinetic model coincides with the adsorption behavior of the composite aerogel. Furthermore, the composite aerogel exhibited better reusability for five adsorption and desorption cycles with highly adsorption properties. The results imply that the new SA-CMC-GO composite aerogel could be potentially applied as an effective and rapid adsorbent for Pb2+ removal from aqueous solutions. © 2023 Beijing University of Aeronautics and Astronautics (BUAA). All rights reserved.
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页码：5792 / 5802
页数：10
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