Bentonites with grafted aminogroups: Synthesis, protolytic properties and assessing Cu(II), Cd(II) and Pb(II) adsorption capacity

Kostenko, Liudmyla; Tomashchuk, Iryna; Ковальчук, Т. В.; Zaporozhets, Olga A.

doi:10.1016/j.clay.2019.02.009

Cited by 50 publications

(8 citation statements)

References 49 publications

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“…Besides, the peak at 841 cm –1 is ascribed to the Al–Ca–OH bending vibration, and the strong peak at 990 cm –1 is attributed to the Si–O stretching vibration . Furthermore, the two peaks at 1633 and 3394 cm –1 are corresponding to H 2 O molecules on the surface of nBent, and the peak at 3614 cm –1 is attributed to the structural OH vibration . The FTIR spectrum of CMC shows two peaks at 918 and 1072 cm –1 corresponding to C–O stretching and C–O–C vibration, respectively .…”

Section: Results and Discussionmentioning

confidence: 97%

“…33 Furthermore, the two peaks at 1633 and 3394 cm −1 are corresponding to H 2 O molecules on the surface of nBent, and the peak at 3614 cm −1 is attributed to the structural OH vibration. 34 The FTIR spectrum of CMC shows two peaks at 918 and 1072 cm −1 corresponding to C−O stretching and C−O−C vibration, respectively. 11 Additionally, the peak at 1329 cm −1 is ascribed to C−OH stretching vibration.…”

Section: Resultsmentioning

confidence: 99%

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Zero Valent Iron Nanoparticle-Loaded Nanobentonite Intercalated Carboxymethyl Chitosan for Efficient Removal of Both Anionic and Cationic Dyes

et al. 2021

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A zero valent iron-loaded nano-bentonite intercalated carboxymethyl chitosan (nZVI@nBent–CMC) composite was fabricated and characterized by FT-IR, TEM, TEM–EDX, XRD, BET surface area, and zeta potential measurements. The as-fabricated nZVI@nBent–CMC composite exhibited excellent removal efficiency for both anionic Congo red (CR) dye and cationic crystal violet (CV) dye. The maximum uptake capacities of CR and CV onto the nZVI@nBent–CMC composite were found to be 884.95 and 505.05 mg/g, respectively. The adsorption process of both dyes well fitted with the Langmuir isotherm model and pseudo-second order kinetic model. Thermodynamic data clarified that the adsorptions of both CR and CV onto the nZVI@nBent–CMC composite are spontaneous processes. Moreover, the adsorption of CR onto the nZVI@nBent–CMC composite was found to be an exothermic process while that of CV is an endothermic process. The nZVI@nBent–CMC composite also exhibited excellent reusability for both studied dyes without noticeable loss in the removal efficiency, suggesting its validity to remove both anionic and cationic dyes from wastewater.

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Section: Results and Discussionmentioning

confidence: 97%

Section: Resultsmentioning

confidence: 99%

Zero Valent Iron Nanoparticle-Loaded Nanobentonite Intercalated Carboxymethyl Chitosan for Efficient Removal of Both Anionic and Cationic Dyes

et al. 2021

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“…19 More importantly, clay minerals have attracted significant attention for diversified applications including pollutants removal/remediation, because of their high specific surface area, adsorption capacity and excellent adsorption behavior towards cationic sensitizers. 20 The most used clays as nano-adsorbents are montmorillonite/ smectite group and kaolinite clays. 21 Cu(II) exchanged montmorillonite 22 and TiO 2 pillared montmorillonites 23 are successfully employed for the adsorption and degradation of dyes.…”

Section: Introduction *mentioning

confidence: 99%

Preparation and characterisation of montmorillonite-Fe3+ (MMT-Fe3+) nanoclay mineral for crystal violet (CV) removal from aqueous solutions

Boudjemaa¹

2021

Rev.Roum.Chim.

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Montmorillonite-Fe3+ (MMT-Fe3+) nanoclay mineral was successfully prepared using a ferric chloride precursor. The prepared sample was characterized using IR, XRD, BET and SEM-EDX. We have explored the highly efficient and environmentally benign MMT-Fe3+ for adsorption of Crystal Violet (CV) dye from aqueous solution under ambient conditions. The MMT-Fe3+ was interacted with CV dye solution at different pH, temperature and solid-to-liquid ratio. The concentration of CV dye removal was estimated from its optical density at λmax = 590 nm using UV–Vis spectrophotometer. The CV dye removal was rapid at basic pH and increases with temperature up to 40 °C. A complete reduction (100%) was occurred in about 7 min at pH 7 and 10 while at pH 3 in about 10 min. The time taken for complete reduction at 0, 30 and 40 °C are 10, 7 and 5 min respectively. The removal followed by adsorption of dye molecules on the spent nanoclay mineral was evident from SEM/EDX analysis. More importantly, MMT-Fe3+ could be separated and retrieved easily after the reaction by centrifugation from the degraded CV dye solution. The experimental results of CV dye removal from MMT-Fe3+ follows the pseudo first order kinetics. This study reveals that MMT-Fe3+ has the potential to be used as reductant/adsorbant to remove cationic pollutants effectively and rapidly from drinking water and large scale of industrial wastewater.

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“…[ 32–35 ] Salamo‐based compounds and their derivatives are the most versatile chelating ligands in inorganic and organometallic chemistry. [ 36–39 ] Salamo‐based ligands are constructed using oxygen and nitrogen atoms and exhibit basically similar coordination characteristics with a wide range of metal ions. [ 40–43 ] They have the advantages of relatively simple preparation methods, relatively easy structure modifications, and good selectivity.…”

Section: Introductionmentioning

confidence: 99%

Highly efficient detection of Cu²⁺and B₄O₇²⁻based on a recyclable asymmetric salamo‐based probe in aqueous medium

Tao

et al. 2020

Luminescence

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An asymmetric salamo‐based probe molecule (H2L) was synthesized and characterized structurally. When DMF/H2O (9:1) was used as the solvent, it was shown probe H2L has high sensitivity to Cu2+. Using high‐resolution mass spectrometry and theoretical calculation, it was found that probe H2L could form a more stable complex (1:1) with Cu2+, the minimum limit of detection (LOD) of H2L for Cu2+ was calculated as 9.95 × 10−8 M. In addition, probe H2L could also be used to identify B4O72− under the same detection conditions and the minimum LOD of H2L for B4O72− was calculated as 4.98 × 10−7 M. At the same time, density functional theory theoretical calculation further proved the flexibility of probe H2L. Through the action of EDTA, probe H2L had a cyclic ability to recognize Cu2+, and showed a better response in the physiological pH range; probe H2L had the characteristics of fast recognition speed and high efficiency. In addition, with probe H2L test paper for Cu2+ and B4O72−, the effect was more obvious. Meanwhile, probe H2L can be used to quantitatively detect Cu2+ in water samples.

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Bentonites with grafted aminogroups: Synthesis, protolytic properties and assessing Cu(II), Cd(II) and Pb(II) adsorption capacity

Cited by 50 publications

References 49 publications

Zero Valent Iron Nanoparticle-Loaded Nanobentonite Intercalated Carboxymethyl Chitosan for Efficient Removal of Both Anionic and Cationic Dyes

Zero Valent Iron Nanoparticle-Loaded Nanobentonite Intercalated Carboxymethyl Chitosan for Efficient Removal of Both Anionic and Cationic Dyes

Preparation and characterisation of montmorillonite-Fe3+ (MMT-Fe3+) nanoclay mineral for crystal violet (CV) removal from aqueous solutions

Highly efficient detection of Cu²⁺and B₄O₇²⁻based on a recyclable asymmetric salamo‐based probe in aqueous medium

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Bentonites with grafted aminogroups: Synthesis, protolytic properties and assessing Cu(II), Cd(II) and Pb(II) adsorption capacity

Cited by 50 publications

References 49 publications

Zero Valent Iron Nanoparticle-Loaded Nanobentonite Intercalated Carboxymethyl Chitosan for Efficient Removal of Both Anionic and Cationic Dyes

Zero Valent Iron Nanoparticle-Loaded Nanobentonite Intercalated Carboxymethyl Chitosan for Efficient Removal of Both Anionic and Cationic Dyes

Preparation and characterisation of montmorillonite-Fe3+ (MMT-Fe3+) nanoclay mineral for crystal violet (CV) removal from aqueous solutions

Highly efficient detection of Cu2+and B4O72−based on a recyclable asymmetric salamo‐based probe in aqueous medium

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Highly efficient detection of Cu²⁺and B₄O₇²⁻based on a recyclable asymmetric salamo‐based probe in aqueous medium