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- Title
Reconstructing Kaolinite Compounds for Remarkably Enhanced Adsorption of Congo Red.
- Authors
Liu, Ting; Li, Xinle; Wang, Hao; Li, Mingyang; Yang, Hua; Liao, Yunhui; Tang, Wufei; Li, Yong; Liu, Fang
- 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 m2/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.
- Subjects
KAOLINITE; CONGO red (Staining dye); ORGANIC dyes; SCANNING electron microscopy; ENVIRONMENTAL protection; WATER pollution
- Publication
Molecules, 2024, Vol 29, Issue 9, p2121
- ISSN
1420-3049
- Publication type
Article
- DOI
10.3390/molecules29092121