Characterization of microspheres γ-AlOOH and the excellent removal efficiency of Congo red

Wang, Ding; Li, Zhonglin; Lv, Fengcheng; Guan, Meijie; Chen, Junxue; Li, Yuping; Li, Yibing; Zhang, Weiguang

doi:10.1016/j.jpcs.2022.111043

Cited by 12 publications

(13 citation statements)

References 51 publications

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“…A-Kaol showed a peak at 20.86 • and a broad band between 15 and 25 • , which could be attributed to crystalline and amorphous phases of SiO 2 [31], respectively. As for γ-AlOOH, the characteristic diffraction peaks were assigned to 14.56, 28.21, 38.41, and 49.29 • , which corresponded to the crystal planes of (020), (120), (031), and (200), respectively [32][33][34]. After treatment by γ-AlOOH, it was found that the characteristic diffraction peaks of γ-AlOOH and A-Kaol were also present.…”

Section: Characterizationmentioning

confidence: 95%

Reconstructing Kaolinite Compounds for Remarkably Enhanced Adsorption of Congo Red

Liu,

Li,

Wang

et al. 2024

Molecules

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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.

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Section: Characterizationmentioning

confidence: 95%

Reconstructing Kaolinite Compounds for Remarkably Enhanced Adsorption of Congo Red

Liu,

Li,

Wang

et al. 2024

Molecules

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“…Additionally, they have proven to be valuable in environmental applications, particularly as adsorbents and catalysts in wastewater treatment; they have been employed for the removal of dyes [7], fluoride [8], heavy metals [9] and phosphorus [10]. Boehmite with different morphologies has been developed using various methods, including precipitation [11], the sol-gel process [12], the hydrothermal route [13] and spray drying [1]. Most of these methods are costly and rely on the use of aluminum salts.…”

Section: Adsorbents Characterization 211 Xrd Analysismentioning

confidence: 99%

“…The FTIR spectrum of γ-AlOOH is illustrated in Figure 2a; the broad band located at 3440 cm −1 and the band at 1639 cm −1 are attributed to the stretching and bending modes of physically adsorbed water, respectively [19]. Although the band at 3440 cm −1 dominates the region, the band at 3315 cm −1 , characteristic of the stretching vibrations of the structural OH group, can be identified [1]. The shoulder at 3093 cm −1 is associated with the (Al)O-H stretching vibration of γ-AlOOH [19].…”

Section: Ftir Analysismentioning

confidence: 99%

“…In recent decades, the contamination of water resources by wastewater has become a crucial issue. A considerable volume of these wastewaters come from dyeing water, which is estimated at about 3 to 4 million cubic meters per day [1]. Indeed, dye waters contain a variety of chemical dyes that can be classified into different categories according to their application; azo dyes are the most frequently encountered dyes, and are known for their distinctive Azo groups (-N=N-).…”

Section: Introductionmentioning

confidence: 99%

“…Boehmite with different morphologies has been developed using various methods, including precipitation [11], the sol-gel process [12], the hydrothermal route [13] and spray drying [1]. Most of these methods are costly and rely on the use of aluminum salts.…”

Section: Introductionmentioning

confidence: 99%

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Adsorption of Eriochrome Black T on Pseudo Boehmite and Gamma Alumina Synthesized from Drinking Water Treatment Sludge: A Waste-to-Recycling Approach

Ballou,

Naja,

Bakher

et al. 2024

Recycling

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Eriochrome black T is considered as one of the anionic dyes with potential harmful effects on human health and the environment. Among other processes, adsorption can contribute to the removal of these dyes. In the present study, two adsorbent materials, pseudo-boehmite (γ-AlOOH) and gamma alumina (γ-Al2O3), were synthesized and tested in the removal of the Eriochrome black T molecule (EBT). γ-AlOOH and γ-Al2O3 were obtained by precipitation from NaAlO2 solution at pH = 7, at a temperature of 80 °C, and by the thermal transformation of γ-AlOOH at 800 °C, respectively. In order to gain insights into the structural, chemical, thermal and morphological properties of these materials, numerous analytical techniques were involved, including X-ray diffraction (XRD), Fourier-transform infrared spectroscopy (FTIR), differential thermogravimetric–thermal analysis (TGA-DTA), scanning electron microscopy with energy-dispersive spectroscopy (SEM-EDS), and specific surface area measurement using the Brunauer–Emmett–Teller (BET) method. Several adsorption parameters were studied, such as the adsorbent dose, initial concentration, pH, contact time and reaction temperature. The kinetic study showed that EBT adsorption follows the pseudo-second-order model. The Langmuir isotherm model revealed a maximum EBT adsorption capacity of 344.44 mg g−1 and 421.94 mg g−1 for γ-AlOOH and γ-Al2O3, respectively. A textural and structural analysis after adsorption highlighted the effective adsorption of the dye.

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Bismuth oxymetallate-modified biochar derived from Euryale ferox husk for efficient removal of Congo red from wastewater: adsorption behavior and mechanisms

Zhang,

Li,

Liu

et al. 2024

Environ Sci Pollut Res

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Characterization of microspheres γ-AlOOH and the excellent removal efficiency of Congo red

Cited by 12 publications

References 51 publications

Reconstructing Kaolinite Compounds for Remarkably Enhanced Adsorption of Congo Red

Reconstructing Kaolinite Compounds for Remarkably Enhanced Adsorption of Congo Red

Adsorption of Eriochrome Black T on Pseudo Boehmite and Gamma Alumina Synthesized from Drinking Water Treatment Sludge: A Waste-to-Recycling Approach

Bismuth oxymetallate-modified biochar derived from Euryale ferox husk for efficient removal of Congo red from wastewater: adsorption behavior and mechanisms

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