Organically modified montmorillonite as an environmental adsorbent of pollutants: Formaldehyde from urea-formaldehyde resin and Acid Red 183 dye from the aqueous solution

Ristić, Mirjana; Samaržija-Jovanović, Suzana; Jovanović, Tijana; Jovanović, Vojislav; Kostić, Marija; Marković, Gordana; Marinović-Cincović, Milena

doi:10.1016/j.jece.2023.111828

Cited by 3 publications

(2 citation statements)

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“…Bands of 3430 cm −1 and 1620 cm −1 correspond to the vibration of H-OH [39]. The band at 3628 cm −1 is associated with the functional group Al-OH [40]. The peak of Si-O-Si was observed at 790 cm −1 [40].…”

Section: Montmorillonite Modificationmentioning

confidence: 96%

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Shrinkage Reduction in Nanopore-Rich Cement Paste Based on Facile Organic Modification of Montmorillonite

Yang,

Chen

et al. 2024

Materials

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The organic modification of montmorillonite was successfully achieved using cetyltrimethyl ammonium bromide under facile conditions. The modified montmorillonite was subsequently used for the fabrication of montmorillonite-induced nanopore-rich cement paste (MNCP), and the shrinkage behavior and fundamental performance of MNCP were also investigated. The results indicate that alkali cations on a montmorillonite layer surface were exchanged by using CTAB under 80 °C, successfully achieving the organic modification of montmorillonite. As a pore-forming agent, the modified montmorillonite caused a reduction in shrinkage: the 28-day autogenous shrinkage at a design density of 400 kg/m3 and 800 kg/m3 was reduced to 2.05 mm/m and 0.24 mm/m, and the highest reduction percentages during the 28-day drying shrinkage were 68.1% and 62.2%, respectively. The enlarged interlamellar pores and hydrophobic effects caused by the organic modification of montmorillonite aided this process. Organic-modified montmorillonite had a minor influence on dry density and thermal conductivity and could contribute to an enhancement of strength in MNCP.

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Section: Montmorillonite Modificationmentioning

confidence: 96%

“…The band at 3628 cm −1 is associated with the functional group Al-OH [40]. The peak of Si-O-Si was observed at 790 cm −1 [40]. The weak absorption band at 912 cm −1 is related to the Al-OH in the vibration [41].…”

Section: Montmorillonite Modificationmentioning

confidence: 96%