An FTIR investigation of hexadecyltrimethylammonium intercalation into rectorite

Li, Zhaohui; Jiang, Wei Teh; Hong, Hanlie

doi:10.1016/j.saa.2008.05.015

Cited by 132 publications

(77 citation statements)

References 26 publications

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“…FT-IR bands of the sorbed CTMA on zeolite, however, slightly shifted toward greater wave number which can be attributed to a crystal-field effect from the clay. [34] The bands centered at 1,472 and 1,486 cm −1 in the pure CTMA spectrum related to scissoring and bending vibrations of methylene groups of CTMA, respectively, [35,36] were also found in CTMA 100 -bent and CTMA 200 -bent spectra at 1,469 and 1,468 cm −1 , respectively, showing significant changes in the methyl deformation region (Fig. 2a).…”

Section: Ft-ir Spectramentioning

confidence: 92%

Mobility and efficacy of 2,4-D herbicide from slow-release delivery systems based on organo-zeolite and organo-bentonite complexes

Shirvani

Farajollahi

Bakhtiari

et al. 2014

Journal of Environmental Science and Health, Part B

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This research aimed to develop slow-release formulations (SRFs) of 2,4-dichlorophenoxyacetic acid (2,4-D) using zeolite and bentonite minerals modified with cetyltrimethylammonium (CTMA) surfactant. Adsorption-desorption, greenhouse bioassay and column experiments were carried out to assess the potential of the SRFs to control weeds while reducing the herbicide leaching losses to deep layers of soil. The results showed that only 6.5 mmol 2,4-D kg −1 was retained by Na-bent, and the herbicide was not adsorbed by Na-zeol at all. The surface modification with CTMA surfactant, however, improved the 2,4-D adsorption capacity of the zeolite and bentonite up to 207.5 and 415.8 mmol kg , respectively. The synthesized organo-minerals slowly released the retained 2,4-D discharging 22 to 64% of the adsorbed 2,4-D to the solution phase within 7 days. The SRFs significantly (P = 0.05) reduced the herbicide mobility within the soil columns keeping a great portion of the herbicide active ingredient in the upper 5 cm soil layer. The SRFs were significantly (P = 0.05) as effective as the free technical herbicide in weed control without harming the ryegrass as the main plant. Therefore, the synthesized SRFs could be considered as useful tools for weed control in sustainable agriculture.

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Section: Ft-ir Spectramentioning

confidence: 92%

Mobility and efficacy of 2,4-D herbicide from slow-release delivery systems based on organo-zeolite and organo-bentonite complexes

Shirvani

Farajollahi

Bakhtiari

et al. 2014

Journal of Environmental Science and Health, Part B

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show abstract

“…, corresponding to methylene scissoring vibrations, are sensitive to surfactant chain interactions as well as diagnostic of alkyl chain packing (Casal et al, 1982;Venkataraman and Vasudevan, 2001;Li et al, 2008;Ma et al, 2010). The spectrum of pure C16 showed a doublet at 1475 and 1463 cm − 1 (Fig.…”

Section: Fourier-transform Infrared Spectroscopymentioning

confidence: 99%

Al13-pillared montmorillonite modified by cationic and zwitterionic surfactants: A comparative study

Zhu

et al. 2014

Applied Clay Science

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“…It has also been observed that the absorption band at 3020 cm -1 showed a more notable intensity in the samples JaC and DLC compared to samples B1C and B2C. The presence of this band would be related to a higher ordering of the large carbon chain 80 . Figure 4b showed doublet for the band associated with scissoring (1490 y 1490 cm -1 )…”

Section: Resultsmentioning

confidence: 84%

“…For CTMA-bentonites, characteristic bands of cation organic CTMA + are localized at 3020 cm -1 , assigned to the symmetric stretching mode of the trimethylammonium headgroup CH 3 -N while the bands 2918 cm -1 and 2849 cm -1 are typical asymmetrical and symmetrical modes of bond C-H methylene asymmetric and symmetric, respectively (concerning CTMACL solid) 77 . The wavenumber of C-H methylene stretching absorption bands of CTMA + cation are extremely sensitive to the degree of ordering adopting carbon chain in each conformation [78][79][80][81] . When the chains are highly ordered (all trans) and with high packing density, these absorption bands are close to the wavenumber of the pure CTMACL solid.…”

Section: Resultsmentioning

confidence: 99%

Influence of organobentonite structure on toluene adsorption from water solution

Vidal¹,

Volzone²

2012

Mat. Res.

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Due to increase water pollution by organic compound derived from hydrocarbons such as toluene, several alternative technologies for remediation of polluted water have been originated. In this work natural bentonites were modified with cetyltrimethylammonium (CTMA + ) for obtaining organophilic bentonites. The obtained CTMA-bentonites would be suitable for use as adsorbents of toluene present in water. The influence of structural characteristics of CTMA-bentonites on their adsorption capacity was studied. It was shown that adsorption of toluene depended on homogeneous interlayer space associated with arrangements of CTMA + paraffin-monolayer and bilayer models, accompanied by a high degree ordering of the carbon chain of organic cation in both arrangements. However, packing density would not have an evident influence on the retention capacity of these materials. The solids obtained were characterized by chemical analysis, X-ray diffractions and infrared spectroscopy. Toluene adsorption was measured by UV-visible spectrophotometer. Adsorption capacity was studied by determining adsorption isotherms and adsorption coefficient calculation. The adsorption isotherms were straight-line indicating a partition phenomenon of toluene between the aqueous and organic phase present in organophilic bentonites.

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An FTIR investigation of hexadecyltrimethylammonium intercalation into rectorite

Cited by 132 publications

References 26 publications

Mobility and efficacy of 2,4-D herbicide from slow-release delivery systems based on organo-zeolite and organo-bentonite complexes

Mobility and efficacy of 2,4-D herbicide from slow-release delivery systems based on organo-zeolite and organo-bentonite complexes

Al13-pillared montmorillonite modified by cationic and zwitterionic surfactants: A comparative study

Influence of organobentonite structure on toluene adsorption from water solution

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