Removal of Sb(III) by 3D-reduced graphene oxide/sodium alginate double-network composites from an aqueous batch and fixed-bed system

Xiuzhen Yang; Tengzhi Zhou; Renjian Deng; Zhenya Zhu; Atif Saleem; Yuezhou Zhang

doi:10.1038/s41598-021-01788-0

Removal of Sb(III) by 3D-reduced graphene oxide/sodium alginate double-network composites from an aqueous batch and fixed-bed system

Sci Rep. 2021 Nov 17;11(1):22374. doi: 10.1038/s41598-021-01788-0.

Authors

Xiuzhen Yang¹, Tengzhi Zhou¹, Renjian Deng¹, Zhenya Zhu², Atif Saleem³, Yuezhou Zhang⁴

Affiliations

¹ College of Civil Engineering, Hunan University of Science and Technology, Xiangtan, 411201, China.
² College of Ecological Health, Hangzhou Vocational and Technical College, Xue Yuan Road. No.68, Hangzhou, 310018, China.
³ Frontiers Science Center for Flexible Electronics (FSCFE), Xi'an Institute of Flexible Electronics (IFE) and Xi'an Institute of Biomedical Materials and Engineering (IBME), Northwestern Polytechnical University, 127 West Youyi Road, Xi'an, 710072, China.
⁴ Frontiers Science Center for Flexible Electronics (FSCFE), Xi'an Institute of Flexible Electronics (IFE) and Xi'an Institute of Biomedical Materials and Engineering (IBME), Northwestern Polytechnical University, 127 West Youyi Road, Xi'an, 710072, China. iamyzzhang@nwpu.edu.cn.

Abstract

We created 3D-reduced graphene oxide/sodium alginate double network (GAD) beads to address the problem of local water pollution by antimony. GAD is a novel material with the high specific surface area of graphene and biosecurity of sodium alginate. Due to the introduction of graphene, the thermal stability and specific surface area of GAD are enhanced, as shown from the FTIR, TGA, BET, Raman, and XRD characterizations. The influence of different environmental variables-such as the pH, dosage, temperature, contact time, and sodium chloride concentration on the Sb(III) sorption with GAD-was investigated. The adsorption results fit well with both the pseudo-second order (R² > 0.99) and Freundlich (R² > 0.99) isotherm models. The temperature rise has a negative influence on the adsorption. The Langmuir adsorption capacity is 7.67 mg/g, which is higher than many adsorbents. The GAD results from the fixed-bed adsorption experiment were a good fit with the Thomas model (R² > 0.99). In addition, GAD appears to be a renewable and ideal adsorbent for the treatment of antimony pollution in aqueous systems.

Publication types

Research Support, Non-U.S. Gov't

Abstract

Publication types

Grants and funding