Thermodynamics and mechanism of cetyltrimethylammonium adsorption onto clayey soil from aqueous solutions

Gürses, Ahmet; Karaca, Semra; Açıkyıldız, Metin; Ejder, M.

doi:10.1016/j.cej.2008.07.001

Cited by 35 publications

(10 citation statements)

References 28 publications

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“…This means that the adsorption intensity of the QACs to the sludge is closely related to the hydrophobicity of the compound. This result is in agreement with previous findings which indicate that at low concentrations, adsorption of C14BDMA to activated sludge mainly occurs through ionic interactions, but at high concentration the hydrocarbon chain dominates the process (Gurses et al, 2009;Ren et al, 2011). Fig.…”

Section: Resultssupporting

confidence: 94%

Degradation of cationic surfactants using immobilized bacteria: Its effect on adsorption to activated sludge

Bergero

Lucchesi

2018

Journal of Biotechnology

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Adsorption of cationic surfactants (QACs) Br-tetradecyltrimethylammonium (TTAB), Cl-tetradecylbenzyldimethylammonium (CBDMA) and Cl-hexadecylbenzyldimethylammonium (CBDMA) to activated sludge from a wastewater treatment plant was tested. Adsorption equilibrium was reached after 2 h, and for initial 200 mg L 81%, 90% and 98% of TTAB, CBDMA and CBDMA were respectively adsorbed. After six successive desorption cycles, 21% of TTAB and 12.7% of CBDMA were desorbed from the sludge. In agreement with the percentage of QACs pre-adsorbed, the more hydrophobic the compound, the lesser the extent of desorption. Wastewater samples with activated sludge were supplemented with TTAB 200 mg L and Ca-alginate beads containing the QACs-degrading microorganisms Pseudomonas putida A (ATCC 12633) and Aeromonas hydrophila MFB03. After 24 h, 10 mg L of TTAB were detected in the liquid phase and 6-8 mg L adsorbed to the sludge. Since without Ca-alginate beads or with empty beads total TTAB amount (phase solid and liquid) did not change, the 90% reduction of the initial 200 mg L after treatment with immobilized cells was attributed to the bacterial consortium's capacity to biodegrade QACs. The results show the advantages of using immobilized bacteria to achieve complete QACs elimination from wastewater systems, thus preventing them from reaching the environment.

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Section: Resultssupporting

confidence: 94%

Degradation of cationic surfactants using immobilized bacteria: Its effect on adsorption to activated sludge

Bergero

Lucchesi

2018

Journal of Biotechnology

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“…Therefore, the characterization of the impact of organic phase on the measured electrical conductivity of organoclays is important to use organoclays in barriers. Studies on the electrical conductivity of organoclays, however, are limited except for the electrical conductivity measurements on suspensions (porosity~1) of clays modified with surfactants or polymers (Akbulut et al, 2010;Gurses et al, 2009; Stojiljkovic et al, 2014). Electrical conductivity of organoclays varies with different organic carbon structures and densities of loading as a function of porosity ( Fig.…”

Section: Electrical Conductivitymentioning

confidence: 98%

Review of the fundamental geochemical and physical behaviors of organoclays in barrier applications

Zhao

Choo

Bhatt

et al. 2017

Applied Clay Science

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“…In recent decades, natural clay materials have been widely used for removing organic compounds such as organic dyes from aqueous solutions because of their availability, nontoxicity, mechanical and chemical stabilities, high surface area, and low price compared to the conventional activated carbon. 10,11 Montmorillonite is one type of clay material, existing in most soils abundantly. This type of clay is employed as a low-cost alternative to activated carbon.…”

Section: Introductionmentioning

confidence: 99%

Optimization of the adsorption of a textile dye onto nanoclay using a central composite design

Hassani¹,

Kıranşan²,

Soltani³

et al. 2015

Turk J Chem

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Abstract:The main aim of this study was to evaluate the efficacy of montmorillonite clay for the adsorption of C.I. Basic The adsorbent dosage was found to be the key factor that controlled dye adsorption. The adsorption kinetic and isotherm were also investigated. The rate of adsorption showed the best fit with the pseudo-second order model (R 2 = 1). The results of the isotherm study fit the Freundlich model (R 2 > 0.9). The physicochemical properties of the sample were determined by XRF, XRD, FT-IR, and N 2 adsorption-desorption.

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Thermodynamics and mechanism of cetyltrimethylammonium adsorption onto clayey soil from aqueous solutions

Cited by 35 publications

References 28 publications

Degradation of cationic surfactants using immobilized bacteria: Its effect on adsorption to activated sludge

Degradation of cationic surfactants using immobilized bacteria: Its effect on adsorption to activated sludge

Review of the fundamental geochemical and physical behaviors of organoclays in barrier applications

Optimization of the adsorption of a textile dye onto nanoclay using a central composite design

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