Combined determination analysis of surface properties evolution towards bentonite by pH treatments

Du, Wei; Yang, Yajun; Hu, Liang; Chang, Bokun; Cao, Gang; Nasir, Mubasher; Lv, Jialong

doi:10.1016/j.colsurfa.2021.127067

Cited by 6 publications

(2 citation statements)

References 63 publications

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“…As shown in Figure b, with the increase of pH from ≈2.0 to 5.0, the adsorption capacity of the Zn-BDC MOF/GO composite material to La(III) gradually increases, and the maximum adsorption capacity is reached when the pH value is ≈4. It is reported that the value of ζ potential is related to the stability of colloidal dispersion. − From the results of ζ potential measured by the Zn-BDC MOF/GO composite material (Figure c), due to the existence of oxygen-containing functional groups, with the increase of pH value, the surface carboxyl and hydroxyl groups of the composite material are deprotonated, and the negative charge on the surface of the composite material enhances the electrostatic attraction force between the material and the rare earth ions, thereby increasing the adsorption capacity.…”

Section: Resultsmentioning

confidence: 99%

Selective Adsorption of Rare Earth Elements by Zn-BDC MOF/Graphene Oxide Nanocomposites Synthesized via In Situ Interlayer-Confined Strategy

Chen

Zhan

Chen

et al. 2022

Ind. Eng. Chem. Res.

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Separation of rare earth elements has always been an urgent problem in the industry. Although a variety of adsorption materials have been developed for the adsorption and separation of rare earth elements, it is difficult to achieve high adsorption capacity and high separation selectivity from most of them at the same time. In this work, to combine the advantages of the good adsorption capacity of graphene oxide (GO) and high separation selectivity of metal organic frameworks (MOFs), two-dimensional MOFs and GO nanocomposite materials (2D Zn-BDC MOF/GO) were synthesized by a solvothermal interlayer-confined strategy. The composite material has a maximum adsorption capacity of 344.48 mg/g for rare earth ions, with the selectivity of Sc/Tm ≈ 529.57, Sc/Er ≈ 461.91, Sc/Y ≈ 445.70, and Tm/Eu ≈ 4.55. This work brings us a new route to synthesize 2D MOF/GO nanocomposite materials and combine their advantages for the separation of rare earth elements in chemical engineering research.

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Section: Resultsmentioning

confidence: 99%

Selective Adsorption of Rare Earth Elements by Zn-BDC MOF/Graphene Oxide Nanocomposites Synthesized via In Situ Interlayer-Confined Strategy

Chen

Zhan

Chen

et al. 2022

Ind. Eng. Chem. Res.

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“…To see the effect of cation exchange with sodium ions on the functional groups of BtB, FTIR-ATR spectra were performed in the range of 4000-500 cm −1 as a common approach to finding the characteristics of functional groups [49]. The vibrations, respectively, the bending modes for the hydroxyl groups and the Si-O stretches in the bentonite structure, are observed in the range of wavelengths 3745-3115 cm −1 and 1227-553 cm −1 [50].…”

Section: Ftir-atr Analysismentioning

confidence: 99%

Chemically Modified Clay Adsorbents Used in the Retention of Protein and Polyphenolic Compounds from Sauvignon Blanc White Wine

Hortolomeu,

Mirila,

Roșu

et al. 2024

Nanomaterials

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During the manufacturing process of white wine, various physicochemical reactions can occur and can affect the quality of the finished product. For this reason, it is necessary to apply different treatments to minimize distinct factors such as protein instability and pinking phenomenon, which can affect the organoleptic properties of wines and their structure. In this work, a new method for the preparation of a sorbent-type material is presented through the fractional purification of native bentonite in three fractions (Na-BtF1, Na-BtF2, and Na-BtF3). Furthermore, the influence of the prepared sorbents on pH, conductivity, and amino nitrogen level was analyzed. The absorbents prepared and tested in wine solutions were characterized using the following physico-chemical methods: Brunauer–Emmett–Teller and Barrett–Joyner–Halenda (BET-BJH) method, X-ray diffraction (XRD) technique, and transform-coupled infrared spectroscopy Fourier with attenuated total reflection (FTIR-ATR). Following the analyses carried out on the retention of protein content and polyphenolic compounds, it was found that materials based on natural clay have suitable adsorption properties.

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Electrochemical mechanisms of Robinia pseudoacacia restoration affecting the interfacial reaction of base cations in loess hilly areas

Zhou,

Yang,

Yang

et al. 2024

CATENA

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Combined determination analysis of surface properties evolution towards bentonite by pH treatments

Cited by 6 publications

References 63 publications

Selective Adsorption of Rare Earth Elements by Zn-BDC MOF/Graphene Oxide Nanocomposites Synthesized via In Situ Interlayer-Confined Strategy

Selective Adsorption of Rare Earth Elements by Zn-BDC MOF/Graphene Oxide Nanocomposites Synthesized via In Situ Interlayer-Confined Strategy

Chemically Modified Clay Adsorbents Used in the Retention of Protein and Polyphenolic Compounds from Sauvignon Blanc White Wine

Electrochemical mechanisms of Robinia pseudoacacia restoration affecting the interfacial reaction of base cations in loess hilly areas

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