Efficient Removal of Anionic Surfactants Using Mesoporous Functionalised Hybrid Materials

Abstract

A new hybrid system for surfactant removal from water has been developed using mesoporous material (MCM-41) functionalised with suitable binding groups. Solid S1, S2 and S3 were prepared by reaction of the mesoporous material with N-methyl-NЈ-(propyltrimethoxysilyl)imidazolium chloride, (3-aminopropyl)trimethoxysilane or 4-[(triethoxysilylpropylthio)methyl]pyridine, respectively. The functionalised materials were characterised following standard solid-state techniques. The final prepared solids consist of a siliceous MCM-41-type mesoporous support with the surface decorated by imidazolium, amine and pyridine binding groups suitable for anion coordination. Equilibrium adsorption studies of linear alkylbenzenesulfonate (LAS) using S1, S2 and S3 in water have been carried out. The obtained adsorption data were correlated with a Langmuir isotherm model that gives an acceptable description of the experimental data. The maximum surfactant uptake/binding site (mol mol -1 ) and

Synthesis and adsorption properties of mesoporous material for the removal of dye safranin: Kinetics, equilibrium, and thermodynamics

“…MCM-41 was prepared by using tetraethylorthosilicate (TEOS) as silicon source, and CTAB as surfactant [20,21]. It was crystallized from gel composed of TEA:TEOS:CTAB:NaOH:H 2 O = 10:2:0.5:0.5:170 in a Teflon container.…”

Low-cost materials for boron adsorption from water

“…for their use as matrices in anion remediation protocols. 25,26 In fact, after the pioneering work devoted to the Hg(II) adsorption 27,28 a great amount of research has been developed on the use of ordered mesoporous materials as adsorbents. [29][30][31] Additionally, given boron's ability to react with non-acidic polyalcohols, it was envisaged that the grafting of mesoporous scaffolds with saccharides could yield highly efficient boron removal systems.…”

Photoluminescence as Complementary Evidence for Short-Range Order in Ionic Silica Nanoparticle Networks

“…These materials were designed in order to take advantage of the highly interesting features of imidazolium moieties and, thus, were developed for numerous applications like catalysis, 17,18 anion exchange, 10,11 selective gas trapping,(12) drug delivery,(6) or electrochemistry. (5)…”