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hexadecyltrimethylammonium

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Journal Article
Journal: Clay Minerals
Published: 01 June 2003
Clay Minerals (2003) 38 (2): 225–232.
...S. Y. LEE; S. J. KIM Abstract The dehydration of hexadecyltrimethylammonium (HDTMA)-exchanged smectites has been studied using X-ray diffractometry (XRD) and differential scanning calorimetry (DSC). The basal spacing of hydrated HDTMA-smectites changed with temperature. The 2.5 HDTMA-smectite (i.e...
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Journal Article
Published: 01 March 2003
Environmental Geosciences (2003) 10 (1): 37–45.
... remediation, the desorption of sorbed surfactant from these mineral surfaces needs further study, particularly from column flow-through desorption tests. In this study, batch and column experiments were performed to evaluate desorption of hexadecyltrimethylammonium, a cationic surfactant, from zeolite...
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Journal Article
Journal: Clay Minerals
Published: 01 September 2002
Clay Minerals (2002) 37 (3): 465–471.
...@hanmir.com 05 02 2001 22 11 2001 © The Mineralogical Society 2002 smectite hexadecyltrimethylammonium X-ray diffraction transmission electron microscopy morphological heterogeneity interlayer Organoclays are formed by replacement of natural inorganic exchangeable cations...
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Journal Article
Published: 01 August 2002
Clays and Clay Minerals (2002) 50 (4): 435–445.
...Seung Yeop Lee; Soo Jin Kim Abstract The adsorption of hexadecyltrimethylammonium (HDTMA) in smectite was studied by adsorption isotherms, X-ray diffraction (XRD) and high-resolution transmission electron microscopy (HRTEM). Smectites that had reacted for 48 h with HDTMA cations equivalent to 0.2...
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Journal Article
Published: 01 February 2002
Clays and Clay Minerals (2002) 50 (1): 11–17.
...@gnv.ifas.ufl.edu 15 11 2000 05 06 2001 © 2002, The Clay Minerals Society 2002 Basal Spacing Hexadecyltrimethylammonium HDTMA Organoclay Sorption Organoclays are synthesized from the exchange of resident metallic cations on clay surfaces by organic alkylammonium cations...
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Journal Article
Published: 01 February 2000
Clays and Clay Minerals (2000) 48 (1): 43–50.
...Guangyao Sheng; Stephen A. Boyd Abstract Sorptive properties of organoclays may be greatly influenced by the physicochemical properties of organic sorbates. Hexadecyltrimethylammonium(HDTMA) clays were prepared using a high-charge smectite (HDTMA-SAz-1), a low-charge smectite (HDTMA-SWy-2...
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Journal Article
Published: 01 February 1999
Clays and Clay Minerals (1999) 47 (1): 28–35.
...Michael A. Anderson; Frans R. Trouw; Cheok N. Tam Abstract Dynamical and thermodynamic properties of water at room temperature in Ca- and hexadecyltrimethylammonium- (HDTMA) exchanged bentonite were determined for 4 different water contents ( approximately 0.03-0.55 g water g (super -1) clay...
Image
The molecular structures of (a) <b>hexadecyltrimethylammonium</b> bromide and (b) ...
Published: 01 September 2013
Fig. 1. The molecular structures of (a) hexadecyltrimethylammonium bromide and (b) hexadecylpyridinium bromide.
Journal Article
Published: 01 April 2013
Clays and Clay Minerals (2013) 61 (2): 98–106.
... carried out. With the aim of contributing to a better understanding of the intercalation process, a series of organoclays was synthesized using a montmorillonite and the cationic surfactant hexadecyltrimethylammonium bromide (HDTMABr), with an increasing surfactant load of between 0.2 and 4.0 times...
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Journal Article
Journal: Clay Minerals
Published: 21 January 2021
Clay Minerals (2020) 55 (4): 342–350.
... and then with organic complexes such as hexadecyltrimethylammonium bromide (HDTMA) and phenyltrimethylammonium chloride (PTMA). Changes in the surface properties and morphology of the montmorillonite before and after the modification with various concentrations of organic complexes were investigated using X-ray...
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Journal Article
Published: 01 December 2018
Clays and Clay Minerals (2018) 66 (6): 515–528.
... the sorption of DCF and Cd(II) from aqueous solutions on an organobentonite. The organobentonite was synthesized by adsorbing the surfactant hexadecyltrimethylammonium (HDTMA) on bentonite; this was designated OBHDTMA. The sorption of DCF and Cd(II) on OBHDTMA and of Cd(II) on OBHDTMA saturated with DCF...
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Journal Article
Journal: Clay Minerals
Published: 01 December 2018
Clay Minerals (2018) 53 (4): 603–620.
...S. Ghodrati; A. Mahmoodi; M. Mohseni ABSTRACT Iranian montmorillonite (MMT) was modified with hexadecyltrimethylammonium bromide (HDTB) and used as a nano-additive for the enhancement of the mechanical and anticorrosion properties of an epoxy coating. Infrared (IR) spectroscopy, thermo-gravimetric...
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Journal Article
Published: 01 October 2018
Clays and Clay Minerals (2018) 66 (5): 426–437.
... azo 57 dye molecules to modified sepiolite. For this purpose, the amenability of sepiolite to remove the anionic textile dye (acid azo red dye 57) was first studied in detail. Additionally, a typical cationic surfactant, hexadecyltrimethylammonium Br (HTAB), was used to modify sepiolite to increase...
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Journal Article
Published: 01 May 2018
American Mineralogist (2018) 103 (5): 700–710.
... cationic surfactants [cetylpyridinium chloride (CP-Cl), benzalkonium chloride (BC-Cl), hexadecyltrimethylammonium chloride (HDTMA-Cl), and bromide (HDTMA-Br) with phillipsite-rich tuff from the Campania region (southern Italy)]. Loading and release kinetics tests of sodium ibuprofen (IBU) were carried out...
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Journal Article
Journal: Clay Minerals
Published: 01 March 2016
Clay Minerals (2016) 51 (1): 39–54.
... by varying the concentration of two surfactants: hexadecyltrimethylammonium (HDTMA + ) and dodecyltrimethylammonium (DTMA + ) ions. These surfactants were used at concentrations 0.7, 1.0 and 1.5 times that of the cation exchange capacity (62.6 meq/100 g) of the clay, with a reaction time of 8 h...
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Journal Article
Journal: Clay Minerals
Published: 01 September 2015
Clay Minerals (2015) 50 (4): 485–496.
...I. Hamadneh; R. Abu-Zurayk; B. Abu-Irmaileh; A. Bozeya; A. H. Al-Dujaili Abstract A comparative study using bentonite (BT), hexadecyltrimethylammonium-modified bentonite (BT-HDTMA) and phenyl fatty hydroxamic acid-modified bentonite (BT-PFHA) as adsorbents for the removal of Pb(II) has been...
Journal Article
Journal: Clay Minerals
Published: 01 March 2015
Clay Minerals (2015) 50 (1): 103–115.
...Barbara Szala; Tomasz Bajda; Anna Jeleń Abstract The removal of Cr(VI) from aqueous solutions under various conditions was investigated using a natural clinoptilolite and a synthetic zeolite derived from fly-ash (Na-P1), modified either with hexadecyltrimethylammonium bromide (HDTMA...
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Journal Article
Journal: Clay Minerals
Published: 01 September 2013
Clay Minerals (2013) 48 (4): 583–593.
...Fig. 1. The molecular structures of (a) hexadecyltrimethylammonium bromide and (b) hexadecylpyridinium bromide. ...
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Journal Article
Published: 01 August 2013
Vadose Zone Journal (2013) 12 (3): vzj2012.0206.
...: benzyltrimethylammonium (BTMA-clay), tetraethylammonium (TEA-clay), and n- hexadecyltrimethylammonium exchanged at 41 and 90% of the cation exchange capacity of the clay (HDTMA41- and HDTMA90-clay). Freeze-dried organoclays were exposed to temperatures of 25, 150, 250, 360 or 420°C for 2 h, and N 2 adsorption isotherms...
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Journal Article
Published: 01 April 2012
Clays and Clay Minerals (2012) 60 (2): 153–161.
... capacity of a prepared OC to evaluate its ability to remove naringin from aqueous solutions, investigating the effect of adsorbent dose, initial concentration of naringin, temperature, contact time, and pH. The OC was prepared by the intercalation of cationic surfactant hexadecyltrimethylammonium bromide...
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