Synthetic High-Charge Organomica: Effect of the Layer Charge and Alkyl Chain Length on the Structure of the Adsorbed Surfactants

Pazos, Manuel; Castro, Miguel; Orta, M. Mar; Pavón, Esperanza; Ríos, Jesús Sigifredo Valencia; Alba, María D.

doi:10.1021/la300153e

Cited by 41 publications

(36 citation statements)

References 54 publications

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“…Thus, the molecular self assembly of the organosilanes or organosulphur groups of the modiers has been proven to be a powerful technique for graing of montmorillonite surfaces. 8,21,22 This is conrmed by the obtained XRD patterns of the montmorillonites before and aer modication, as shown in Fig. Then, these are hydrogen bound to the SiO 2 groups of montmorillonite.…”

Section: Ft-ir Bet Elemental Analyses and Xrdmentioning

confidence: 77%

A facile approach for achieving an effective dual sorption ability of Si/SH/S grafted sodium montmorillonite

et al. 2015

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In this study, sodium montmorillonite was functionalized with SH, S and Si functional groups using four different soil modifiers, 1,3-bis(3-aminopropyl)-1,1,3,3-tetramethyldisiloxane [BAT], 3,3 0tetrathiobis(propyl-triethoxysilane) [TP], thiodiglycol bis(3-aminocrotonate) [TDBA] and (3mercaptopropyl)trimethoxysilane [MPTMS], for the effective uptake of both organic and inorganic pollutants. The uptake of inorganic (Cu 2+ , Zn 2+ ) and organic [benzene, toluene, ethylbenzene and pxylene (BTEX)] pollutants was studied with individual as well as binary mixtures. Based on the experimental results, the soil modifier MPTMS best improved the sorption characteristics and, among two metal ions, Cu 2+ showed enhanced adsorption. Sorption of BTEX was not correlated with a single parameter and hence it differed for the different cases based on the organic matter content. The obtained log K OC and log K OM values of BTEX in this study for modified montmorillonite arecomparatively larger than those of unmodified montmorillonite or natural soil. Sorption carried out in the binary mixtures showed that there is no interaction between these pollutants and the presence of one did not retard the adsorption of another. The uptake phenomenon was influenced by various combined factors such as the nature, surface charge and surface area of the modified soils.

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Section: Ft-ir Bet Elemental Analyses and Xrdmentioning

confidence: 77%

A facile approach for achieving an effective dual sorption ability of Si/SH/S grafted sodium montmorillonite

et al. 2015

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“…To render the mixture compatible, it is necessary to modify the clay before it is dispersed. For this reason, a pretreatment process should take place to weaken the forces holding the structure [24][25][26][27]. The main goal of this process is to render the surface of the layered silicate more organophilic.…”

Section: Structure Of Layered Silicatesmentioning

confidence: 99%

Polymer-Clay Nanocomposites for Corrosion Protection

Alshahrani¹,

Taie²,

Fihri³

et al. 2018

Current Topics in the Utilization of Clay in Industrial and Medical Applications

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Nanoclays have evoked a great deal of attention lately for the preparation of novel nanocomposite materials for several applications. This is attributed to their lamellar structures, which are distinguished by having high in-plane strength and stiffness, as well as a high aspect ratio. Nanocomposites have exhibited an advanced gas and water barrier properties compared to the pristine polymers. Such advancement plays a major role in enhancing the coating industry, specifically for corrosion protection. One main factor attributing to coating failure is its inability to maintain low water and oxygen permeability thought its service life. The penetration of these elements through the coating leads to corrosion initiation under the coating. The addition of clay to polymeric coatings has great potential to improve the corrosion protection performance of the coatings. This chapter will present the recent advancement in the preparation and utilization of clay nanocomposites as enhanced coatings for corrosion protection.

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“…After adding hot deionized water, the mixture was stirred for 30 min at 50 °C and then the dispersion was centrifuged at 10,000 rpm for 20 minutes. The product was dissolved in a hot ethanol-water mixture (1:1) and stirred for 1 h at 50 ºC and then centrifuged [19,20]. The precipitate was dried at room temperature.…”

Section: Organo-functionalization Of Micasmentioning

confidence: 99%

New insights into surface-functionalized swelling high charged micas: Their adsorption performance for non-ionic organic pollutants

Pazos

Castro²,

Cota³

et al. 2017

Journal of Industrial and Engineering Chemistry

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The major components of the wastewater from the petroleum refineries are benzene, toluene and phenol and one of the techniques applied to the treatment of effluents is sorption using organo-functionalized clay. The materials exploited in the present study are a family of surface-functionalized synthetic micas and their sorption capacities for non-ionic organic pollutants are analyzed. The organo-functionalization of their surface provides them the capacity to sorb effectively non-ionic pollutants in the interface. Their adsorption performance is a function of the alkylamonium properties such as the chain * Corresponding author E-mail: alba@icmse.csic.es 2 length, the mass fraction and the organization of the organic cation in the interlayer space of the micas.

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Synthetic High-Charge Organomica: Effect of the Layer Charge and Alkyl Chain Length on the Structure of the Adsorbed Surfactants

Cited by 41 publications

References 54 publications

A facile approach for achieving an effective dual sorption ability of Si/SH/S grafted sodium montmorillonite

A facile approach for achieving an effective dual sorption ability of Si/SH/S grafted sodium montmorillonite

Polymer-Clay Nanocomposites for Corrosion Protection

New insights into surface-functionalized swelling high charged micas: Their adsorption performance for non-ionic organic pollutants

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