1. Reconstructing Kaolinite Compounds for Remarkably Enhanced Adsorption of Congo Red.
- Author
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Liu, Ting, Li, Xinle, Wang, Hao, Li, Mingyang, Yang, Hua, Liao, Yunhui, Tang, Wufei, Li, Yong, and Liu, Fang
- Subjects
KAOLINITE ,CONGO red (Staining dye) ,ORGANIC dyes ,SCANNING electron microscopy ,ENVIRONMENTAL protection ,WATER pollution - Abstract
Organic dyes are widely used in many important areas, but they also bring many issues for water pollution. To address the above issues, a reconstructed kaolinite hybrid compound (γ-AlOOH@A-Kaol) was obtained from raw kaolinite (Kaol) in this work. The product was then characterized by X-ray diffraction (XRD), Fourier-transform infrared (ATR-FTIR), Brunauer-Emmett-Teller (BET), and scanning electron microscopy (SEM), and the absorption properties of γ-AlOOH@A-Kaol for congo red were further studied. The results demonstrated that flower-like γ-AlOOH with nanolamellae were uniformly loaded on the surface of acid-treated Kaol with a porous structure (A-Kaol). In addition, the surface area (36.5 m
2 /g), pore volume (0.146 cm3 /g), and pore size (13.0 nm) of γ-AlOOH@A-Kaol were different from those of A-Kaol (127.4 m2 /g, 0.127 cm3 /g, and 4.28 nm, respectively) and γ-AlOOH (34.1 m2 /g, 0.315 cm3 /g, and 21.5 nm, respectively). The unique structure could significantly enhance the sorption capacity for congo red, which could exceed 1000 mg/g. The reasons may be ascribed to the abundant groups of -OH, large specific surface area, and porous structure of γ-AlOOH@A-Kaol. This work provides an efficient route for comprehensive utilization and production of Kaol-based compound materials that could be used in the field of environmental conservation. [ABSTRACT FROM AUTHOR]- Published
- 2024
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