Kinetic and equilibrium studies for the adsorption of acid nucleic bases onto K10 montmorillonite

Sciascia, Luciana; Liveri, Maria Liria Turco; Merli, Marcello

doi:10.1016/j.clay.2011.05.021

Cited by 50 publications

(33 citation statements)

References 68 publications

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“…Water molecules are allocated in the interlayer sheet and are coordinated by the exchangeable cations. The size of the cations influences the (001) basal space of the structure (Sciascia et al, 2011). The inorganic-organic ion exchange between the desired organic cations and exchangeable inorganic cations in the interlayers of clays allows to obtain organoclays, which are effective adsorbents for organic and aromatic contaminants in pollution treatment (Meng et al, 2009).…”

Section: Introductionmentioning

confidence: 99%

Synthesis and characterization of ZnAl-layered double hydroxide and organo-K10 montmorillonite for the removal of diclofenac from aqueous solution

Boukhalfa

Boutahala

Djebri

2016

Adsorption Science & Technology

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Two prepared adsorbents, namely, calcined ZnAl-layered double hydroxide and K10 montmorillonite intercalated with cetyltrimethyl-ammonium bromide cations are used in diclofenac sodium adsorption under the batch reactor operations. The pseudo-second-order model describes better the results of the kinetics. Fitting parameters revealed that the rate of adsorption increased with the increase in diclofenac sodium concentration and decrease in background electrolyte concentration and temperature, while the solution pH did not have a significant effect. The maximum adsorption capacities of diclofenac obtained by Langmuir model are found to be 55.46 and 737.02 mg/g for K10 montmorillonite intercalated with cetyltrimethylammonium bromide cations and ZnAl-C LDH, respectively. The results of adsorption-desorption cycles revealed that ZnAl-C LDH and K10 montmorillonite intercalated with cetyltrimethylammonium bromide cations have an excellent potential to be used as an economical adsorbent for the removal of diclofenac sodium from water.

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Section: Introductionmentioning

confidence: 99%

Synthesis and characterization of ZnAl-layered double hydroxide and organo-K10 montmorillonite for the removal of diclofenac from aqueous solution

Boukhalfa

Boutahala

Djebri

2016

Adsorption Science & Technology

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“…Among them are the nanoclays, like imogolite and halloysite that both have a hollow tubular shape, which have a particular relevance for materials design. Imogolite, Al 2 SiO 3 (OH) 4, possesses an external diameter of ca. 25 Å and an internal diameter of ca.…”

Section: ■ Introductionmentioning

confidence: 99%

“…The different chemistry at each surface offers the opportunity to control the selective interaction with ionic molecules. 3,4 Recent studies proved that HNTs are ecological, biocompatible, and dispersible in water even at very high concentrations where they can form liquid crystalline phases. 5,6 HNTs are abundant all over the world and consequently are available at low cost.…”

Section: ■ Introductionmentioning

confidence: 99%

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Modified Halloysite Nanotubes: Nanoarchitectures for Enhancing the Capture of Oils from Vapor and Liquid Phases

Cavallaro

Milioto

Parisi

et al. 2013

ACS Appl. Mater. Interfaces

155

129

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We prepared hybrid halloysite nanotubes (HNT/sodium alkanoates) in which the inner cavity of the nanoclay was selectively modified. Physicochemical studies evidenced the interactions between HNT and sodium alkanoates, ruled out clay exfoliation, quantified the amount of the loaded substance, and showed an increase of the total net negative charge, allowing us to obtain rather stable aqueous nanoclay dispersions. These dispersions were exploited as inorganic micelles to capture hydrocarbon and aromatic oils in the vapor and liquid states and were revealed to be nonfoaming but very efficient in encapsulating oils. Here, we have fabricated biocompatibile and low-cost inorganic micelles that can be exploited for industrial applications on a large scale.

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“…Sillitoe 2010; Kadir et al 2011;Premović et al 2012) and weathering pathways controlling processes of clay-mineral formation in acidic soils (Uzarowicz et al 2011). Many studies were devoted to acid treatment of bentonites or smectites (Fijał et al 1975;Číčel & Novák 1976;Stoch et al 1977;Novák & Číčel 1978;Komadel et al 1993Komadel et al , 1996Tkáč et al 1994;Breen et al 1997;Madejová et al 1998;Rožić et al 2010Rožić et al , 2011Sciascia et al 2011), illites, micas or kaolinites (Bahranowski et al 1993;Ganor et al 1995;Kalinowski & Schweda 1996;Dubíková et al 2002;Hradil et al 2002;Jozefaciuk & Bowanko 2002;Pentrák et al 2009Pentrák et al , 2010Nguetnkam et al 2011;Valášková et al 2011;Worasith et al 2011 Al) in octahedral sheets leads to enhancement of the clay mineral dissolution due to higher negative layer charge density (Pentrák et al 2012). The tetrahedra are rearranged from layered into three-dimensional adjustment.…”

Section: Acidification Of the Claysmentioning

confidence: 99%

Stability of kaolin sand from the Vyšný Petrovec deposit (south Slovakia) in an acid environment

Pentrák¹,

Madejová²,

Slávka³

et al. 2012

Geologica Carpathica

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Abstract:Comprehensive characterization of kaolin sand from the Vyšný Petrovec (VP) deposit in Slovakia by a variety of experimental methods was performed. The quantitative XRD analysis (RockJock software) revealed that the acid-untreated sample contained mainly kaolinite (~60 wt. %), a considerable amount of dioctahedral micas (~32 wt. %) and quartz (~7 wt. %). The Hinckley index (HI) and Aparicio-Galán-Ferrel index (AGFI) calculated from the 02l and 11l reflections showed medium-defect kaolinite to be present in the VP kaolin. The influence of the mineral composition of VP kaolin on its stability in 6 mol · dm -3 HCl at 95 °C was investigated. The solid reaction products were examined by chemical analysis; XRD and infrared spectroscopy in both middle (MIR) and near (NIR) regions. Considerably higher dissolution rate of Fe compared to Al indicated that Fe was bounded in a readily soluble phase rather than in kaolinite. While the MIR spectra confirmed the gradual release of the central atoms from the clay minerals layers and creation of amorphous silica upon acid treatment, the NIR spectra revealed the formation of Si-OH groups in the solid reaction product. Relatively high dissolution rate of VP kaolin resulted from the presence of small-grains of mediumdefect kaolinite and clay admixtures in VP kaolin sand.

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Kinetic and equilibrium studies for the adsorption of acid nucleic bases onto K10 montmorillonite

Cited by 50 publications

References 68 publications

Synthesis and characterization of ZnAl-layered double hydroxide and organo-K10 montmorillonite for the removal of diclofenac from aqueous solution

Synthesis and characterization of ZnAl-layered double hydroxide and organo-K10 montmorillonite for the removal of diclofenac from aqueous solution

Modified Halloysite Nanotubes: Nanoarchitectures for Enhancing the Capture of Oils from Vapor and Liquid Phases

Stability of kaolin sand from the Vyšný Petrovec deposit (south Slovakia) in an acid environment

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