Skip to Main content Skip to Navigation
Journal articles

Hybrid organic-inorganic nanotubes effectively adsorb some organic pollutants in aqueous phase

Abstract : Methylimogolite nanotubes (Me-IMO NTs, chemical composition (OH)3Al2O3SiCH3) are characterized by having an inner hydrophobic (fully-methylated) surface. Conversely, the outer surface is hydrophilic and positively charged below the point of zero charge (at pH = 8.6), due to the Al(OH)Al + H+ = Al(OH)2+Al equilibrium occurring at the outer surface of the NTs when they are dispersed in water.In this work, adsorption of MCPA (2-methyl-4-chlorophenoxyacetic acid) and of dichloromethane (DCM) on Me-IMO NTs was studied by means of both adsorption/desorption measurements in batch conditions (at room temperature and at different pH value) and Small Angle X-rays Scattering (SAXS).MCPA, which partially dissociates in water (pKa = 2.90), is mainly adsorbed at the outer surface of the NTs, although measurements in batch conditions show that other types of interaction occur (i.e. H-bond) at higher MCPA concentration. SAXS measurements confirm that MCPA has not entered the NTs inner pores.Interaction of the NTs with DCM, instead, is more complex: SAXS measurements show that DCM molecules interact with the NTs inner surface, whereas batch experiments indicate that additional interactions take place with the outer surface of the NTs.
Document type :
Journal articles
Complete list of metadata

https://hal-cea.archives-ouvertes.fr/cea-02458782
Contributor : Accord Elsevier CCSD Connect in order to contact the contributor
Submitted on : Thursday, July 21, 2022 - 11:00:12 AM
Last modification on : Tuesday, October 4, 2022 - 3:52:10 AM

File

S0169131720300144.pdf
Files produced by the author(s)

Licence


Distributed under a Creative Commons Attribution - NonCommercial 4.0 International License

Identifiers

Citation

Roberto Nasi, Filomena Sannino, Pierre Picot, Antoine Thill, Olimpia Oliviero, et al.. Hybrid organic-inorganic nanotubes effectively adsorb some organic pollutants in aqueous phase. Applied Clay Science, Elsevier, 2020, 186, pp.105449. ⟨10.1016/j.clay.2020.105449⟩. ⟨cea-02458782⟩

Share

Metrics

Record views

44

Files downloads

12