Co-intercalation of organic cations/amide molecules into montmorillonite with tunable hydrophobicity and swellability

Zhou, Chun Hui; Li, Cunjun; Gates, Will P.; Zhu, Ting; Hua, Yu

doi:10.1016/j.clay.2019.105157

Cited by 32 publications

(12 citation statements)

References 57 publications

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“…Wettability of minerals can be directly related to hydrophobicity. It has been shown that introduction of anions or cations on the smectite surface plays a key role in adsorption of water molecules by these minerals (Dazas et al, 2013;Dazas et al, 2015;Zhang et al, 2016;Zhou et al, 2019). Attention should be also paid to the topography of the smectite surface, which can significantly affect the surface wettability (Ou et al, 2018;Xi et al, 2017).…”

Section: Introductionmentioning

confidence: 99%

Intrinsic hydrophobicity of smectite basal surfaces quantitatively probed by molecular dynamics simulations

Szczerba

Kalinichev

Kowalik

2020

Applied Clay Science

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Section: Introductionmentioning

confidence: 99%

Intrinsic hydrophobicity of smectite basal surfaces quantitatively probed by molecular dynamics simulations

Szczerba

Kalinichev

Kowalik

2020

Applied Clay Science

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“…The FTIR spectrum of CBC exhibited characteristic adsorption bands near 3436 cm –1 with a shoulder at 3620 cm –1 , attributable to the adsorption by the interlayer water and the stretching vibrations of structural hydroxyl groups, respectively (Fig. 4a) (Mullassery et al , 2014; Zhou et al , 2019). In addition, the spectra displayed absorption bands at 1640 cm –1 (interlayer water hydroxyl bending vibration), at 1037 cm –1 (Si–O stretching vibrations), at 779 and 795 cm –1 (Si–O–Si symmetric stretching vibrations) and at 521 and 462 cm –1 (Si–O–Al bending vibrations).…”

Section: Resultsmentioning

confidence: 99%

Regeneration of spent bleaching clay by ultrasonic irradiation and its application in methylene blue adsorption

Liang

Yang

et al. 2020

Clay miner.

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An effective method that combines solvent extraction with ultrasonic irradiation was developed to recycle spent bleaching clay (SBC) from modern oil refinery plants. The principle of ‘waste to treasure’ was used to achieve the regenerated SBC. Various characterization techniques were applied to analyse and compare regenerated SBC and commercial bleaching clay (CBC). The structure of the regenerated SBC did not show any obvious change compared with that of CBC, but the Brunauer–Emmett–Teller-specific surface area (SBET) and pore-volume values of the regenerated SBC increased. At the same time, the parameters of the regenerated SBC reached national standards. In addition, the samples were used as low-cost adsorbents for the adsorption of methylene blue (MB) from water. The regenerated SBC had greater adsorption efficiency and cycle performance for MB than CBC. Hence, the SBC may be treated by ultrasonic radiation combined with extraction, and the regenerated SBC has better properties than CBC. This work opens up a new approach to the regeneration and utilization of SBC and raises the potential of ultrasonic irradiation as an environmentally friendly method to be applied to various regeneration systems.

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“…Generally, the modification process is based on replacing the interlayer cations by organo‐cations like alkylammonium or alkylphosphonium cations. Such ion exchange modifies the hydrophilic disposition to organophilic, which enables intercalation and sorption of the organic compounds like polyaromatic hydrocarbons, pharmaceuticals, pesticides, tenzides, etc 15‐20 . But using organic compounds like alkylammonium or alkylphosphonium cations can bring some limitations like quite high cost, lower accessibility or potential gradual desorption of alkylammonium and alkylphosphonium cations leading to the reduction of the adsorption capacity of the prepared organoclay composite and also such released surfactant can become a further potential pollutant in the environment 21,22 .…”

Section: Introductionmentioning

confidence: 99%

Removal of amoxicillin and ampicillin using manganese dioxide/montmorillonite composite

Valovičová

Plevová

Vallová

et al. 2022

J of Chemical Tech & Biotech

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BACKGROUND Clay‐based materials represent great potential for the development of efficient and environmentally friendly sorbents. The study focuses on a laboratory‐obtained manganese dioxide/montmorillonite (MnO2/MMT) composite for removal of two types of antibiotics – amoxicillin (AMX) and ampicillin (AMP) – from aqueous solution. RESULTS The composite was successfully prepared using a reduction procedure involving the reaction between potassium permanganate (KMnO4) and hydrochloric acid (HCl) to form MnO2 followed by the addition of MMT. X‐ray analysis, scanning electron microscopy, X‐ray fluorescence and Fourier transform infrared spectroscopy were performed for characterization of physicochemical and structural properties, simultaneous thermogravimetry and differential scanning calorimetry for estimation of thermal stability and high‐performance liquid chromatography for determination of antibiotic equilibrium concentrations in aqueous solution. The precipitated MnO2 component, manifested by long fibers, corresponded to the tunnel structure of cryptomelane. In the case of MnO2/MMT it is evident that MnO2 developed short fibers with the participation of the MMT matrix. The thermal data suggested that the MnO2 phase upon contact with the clay support showed better thermal stability. The final decomposition of Mn2O3 was shifted to higher temperature of 985 °C. Adsorption procedure in a batch regimen showed sufficient sorption ability for both antibiotics with over 90% efficiency. For AMP the value of qmax was about 45 mg g−1 and for AMX it was only 21 mg g−1. CONCLUSIONS The results provided valuable information for the design of a potentially inexpensive clay‐based adsorbent and demonstrated the removal of two types of broad‐spectrum β‐lactam antibiotics from aqueous solution to a sufficient degree. © 2022 Society of Chemical Industry (SCI).

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Co-intercalation of organic cations/amide molecules into montmorillonite with tunable hydrophobicity and swellability

Cited by 32 publications

References 57 publications

Intrinsic hydrophobicity of smectite basal surfaces quantitatively probed by molecular dynamics simulations

Intrinsic hydrophobicity of smectite basal surfaces quantitatively probed by molecular dynamics simulations

Regeneration of spent bleaching clay by ultrasonic irradiation and its application in methylene blue adsorption

Removal of amoxicillin and ampicillin using manganese dioxide/montmorillonite composite

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