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Insight into thiabendazole interaction with montmorillonite and organically modified montmorillonites
AbstractThe interactions of the fungicide, thiabendazole (TBZ) on montmorillonite (Mt) and organoclays synthesized from phosphatidylcholine (DSPC) and octadecyltrimethylammonium bromide (ODTMA) was investigated for water remediation. The affinity of TBZ on the surface of Mt and organoclays was evaluated by powder X-ray diffraction, X-ray photoelectron spectroscopy and the experimental results were also reinforced by molecular modelling in order to explore the surfaces arrangements. TBZ was protonated upon interaction with negative charged Mt and therefore this strong electrostatic interactions prevented it's desorption in water. Repulsive electrostatic interactions between the cationic surfactant ODTMA and the cationic form of TBZ on the outer surface of the ODTMA modified Mt resulted in high desorption values. In the DSPC modified Mt, TBZ was anchored within the surfactant chains and a small amount of interlayer water was released from the interlayer space.
Graphical abstract
HighlightsWyoming montmorillonite showed the highest TBZ adsorbed amount and no further desorption.Thiabendazole adsorption decreased in organo modified clay respect to raw clay.Protonated thiabendazole tended to be under ODTMA chains and to expel them.TBZ immersed among DSPC chains exhibiting strong interactions between them.
Insight into thiabendazole interaction with montmorillonite and organically modified montmorillonites
AbstractThe interactions of the fungicide, thiabendazole (TBZ) on montmorillonite (Mt) and organoclays synthesized from phosphatidylcholine (DSPC) and octadecyltrimethylammonium bromide (ODTMA) was investigated for water remediation. The affinity of TBZ on the surface of Mt and organoclays was evaluated by powder X-ray diffraction, X-ray photoelectron spectroscopy and the experimental results were also reinforced by molecular modelling in order to explore the surfaces arrangements. TBZ was protonated upon interaction with negative charged Mt and therefore this strong electrostatic interactions prevented it's desorption in water. Repulsive electrostatic interactions between the cationic surfactant ODTMA and the cationic form of TBZ on the outer surface of the ODTMA modified Mt resulted in high desorption values. In the DSPC modified Mt, TBZ was anchored within the surfactant chains and a small amount of interlayer water was released from the interlayer space.
Graphical abstract
HighlightsWyoming montmorillonite showed the highest TBZ adsorbed amount and no further desorption.Thiabendazole adsorption decreased in organo modified clay respect to raw clay.Protonated thiabendazole tended to be under ODTMA chains and to expel them.TBZ immersed among DSPC chains exhibiting strong interactions between them.
Insight into thiabendazole interaction with montmorillonite and organically modified montmorillonites
Gamba, Martina (author) / Kovář, Petr (author) / Pospíšil, Miroslav (author) / Torres Sánchez, Rosa M. (author)
Applied Clay Science ; 137 ; 59-68
2016-12-01
10 pages
Article (Journal)
Electronic Resource
English
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