Adsorption of Direct Red 2 on bentonite modified by cetyltrimethylammonium bromide

Bouberka, Zohra; Khenifi, Aicha; Fatima, Sekrane; Bettahar, Noureddine; Derriche, Z.

doi:10.1016/j.cej.2007.03.086

Cited by 157 publications

(54 citation statements)

References 49 publications

(50 reference statements)

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“…(1,468 cm -1 ) related to the CTA surfactant (Wang and Wang 2008;Bakhtiary et al 2013) were observed on the FT-IR spectra of the surfactant-modified bentonite confirming the adsorption/intercalation of the CTA cations into the montmorillonite galleries. The absorption bands related to bending vibrations of Si-O-Si and Si-O-Al occurred at 469.6 and 520.7 cm -1 , respectively (Zohra et al 2008), but the position of the bands was slightly changed to lower wave numbers after modification of bentonite with CTA surfactant (Table 1). The absorption peak at 1,671.9 cm -1 in the spectrum of the nanocomposite was attributed to the C=O stretching vibrations of the COOH group (Zhao et al 2009;Mahmoud et al 2011), indicating successful grafting of PAA on the surface of the CTA-Bent.…”

Section: Xrd Patternsmentioning

confidence: 99%

Removal of lead from aqueous solutions by a poly(acrylic acid)/bentonite nanocomposite

2014

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We synthesized a novel poly acrylic acid-organobentonite (PAA-Bent) nanocomposite by successive intercalation of cetyltrimethylammonium (CTA) surfactant and polyacrylic acid (PAA) into the bentonite (Bent) interlayer spaces. The surfactant-modified clay (CTABent) and PAA-Bent nanocomposite were characterized by XRD and FT-IR techniques and used for removal of Pb(II) from aqueous solution. The XRD results confirmed the intercalation of CTA and PAA into the interlayer spaces of the bentonite increasing the d 001 spacing of the clay from 12.2 up to 38.9 Å . FT-IR analysis of the modified clay samples revealed the functional groups of CTA and PAA constituents alighted on the bentonite surfaces. Maximum Pb sorption capacity of the Bent and PAA-Bent predicted by Langmuir model were 52.3 and 93.0 mg g -1 , respectively, showing that the synthesized nanocomposite superiorly adsorbed Pb from the solution as compared to the Bent. The maximum Pb removal efficiency of 99.6 % was achieved by the nanocomposite at 25°C with \30 min contact time for a 7.5 g L -1 solid-to-liquid ratio and an initial metal concentration of 400 mg L -1 . The results indicated that PAA-Bent nanocomposite can be efficiently used as a superadsorbent for the removal of Pb(II) from aqueous solution.

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Section: Xrd Patternsmentioning

confidence: 99%

Removal of lead from aqueous solutions by a poly(acrylic acid)/bentonite nanocomposite

2014

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“…This substitution results in the hydrophobic surface nature of bentonite, which is suitable for the adsorption of organic substances. Several studies have reported on the modification of bentonite using various surfactants such as CTAB, CDBAC, CPC, and TMAB for dye removal [17][18][19]. However, the use of synthetic surfactants often causes environmental issues and need an extra cost for the treatment of unused chemicals.…”

Section: Introductionmentioning

confidence: 99%

Removal of basic dyes in binary system by adsorption using rarasaponin–bentonite: Revisited of extended Langmuir model

Kurniawan

Sutiono

Indraswati

et al. 2012

Chemical Engineering Journal

109

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“…Recently, low-cost materials such as fly ash [5], natural zeolite [6], red mud [7] and coir pith [8] accepted vital interest for wastewater treatment. Several modified bentonite are also reported to be inexpensive and effective in water decontamination [9][10][11][12].…”

Section: Introductionmentioning

confidence: 99%

Adsorption of Acid Dyes onto Bentonite and Surfactant-modified Bentonite

Youssef¹,

MM²

2013

J Anal Bioanal Tech

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Adsorption of Congo red (CR) from water via batch adsorption experiments onto bentonite and CTAB-modified bentonite (CTAB-MBn) was investigated. Studies concerning the factors influencing the adsorption capacities of bentonite and CTAB-MBn, such as initial dye concentration, adsorbent dosage, pH, ionic strength, contact time and temperature were systematically investigated and discussed. The results revealed that CTAB-modified bentonite demonstrated high adsorption capacities toward acid dyes, while bentonite exhibited sorption capacities lower than CTAB-MBn. The kinetics data were analyzed using first order and pseudo-second order models. It was best described by the pseudo-second order model. The isotherm data were investigated accord¬ing to Langmuir and Freundlich equations. Thermodynamic parameters ΔG°, ΔH° and ΔS° were calculated for the adsorption of CR on bentonite and CTAB-MBn ; the value of ΔG° showed the spontaneous nature of adsorption for both sorbents.

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Adsorption of Direct Red 2 on bentonite modified by cetyltrimethylammonium bromide

Cited by 157 publications

References 49 publications

Removal of lead from aqueous solutions by a poly(acrylic acid)/bentonite nanocomposite

Removal of lead from aqueous solutions by a poly(acrylic acid)/bentonite nanocomposite

Removal of basic dyes in binary system by adsorption using rarasaponin–bentonite: Revisited of extended Langmuir model

Adsorption of Acid Dyes onto Bentonite and Surfactant-modified Bentonite

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