Adsorption and mechanism of nitrate from groundwater onto Si-Al porous clay mineral material as ceramic waste: characterization, kinetics, and adsorption isotherms

Intercalation of tetracycline into layered clay mineral material for drug delivery purposes

Materials Technology ◽

10.1179/1753555714y.0000000133 ◽

2014 ◽

Vol 29 (sup3) ◽

pp. B96-B99 ◽

Cited By ~ 12

Author(s):

C. Aguzzi ◽

P. Cerezo ◽

G. Sandri ◽

F. Ferrari ◽

S. Rossi ◽

...

Keyword(s):

Drug Delivery ◽

Clay Mineral ◽

Mineral Material ◽

Layered Clay

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Use of General Purpose Adsorption Isotherms for Heavy Metal–Clay Mineral Interactions

Journal of Colloid and Interface Science ◽

10.1006/jcis.1997.5246 ◽

1998 ◽

Vol 198 (1) ◽

pp. 130-140 ◽

Cited By ~ 147

Author(s):

Orhan Altın ◽

H.Önder Özbelge ◽

Timur Doğu

Keyword(s):

Heavy Metal ◽

Clay Mineral ◽

Adsorption Isotherms ◽

General Purpose

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Comparative study of CTAB adsorption on bituminous coal and clay mineral

Chemical Papers ◽

10.2478/s11696-010-0076-9 ◽

2011 ◽

Vol 65 (1) ◽

Cited By ~ 4

Author(s):

Roman Maršálek ◽

Zuzana Navrátilová

Keyword(s):

Zeta Potential ◽

Clay Mineral ◽

Adsorption Isotherms ◽

Bituminous Coal ◽

Differential Pulse ◽

Open Circuit ◽

Carbon Paste ◽

Layer Arrangement ◽

Pulse Voltammetry

AbstractAdsorption of cetyltrimethylammonium bromide (CTAB) onto bituminous coal (BC) and a clay mineral, montmorillonite (MMT), was studied. Simultaneous measurements of the CTAB adsorption and zeta potential determination of the adsorption suspensions were carried out. The adsorption isotherms were found to be of the typical Langmuir type; values of the CTAB adsorption capacities were calculated (a m = 0.65 mmol g−1 for coal and a m = 3.24 mmol g−1 for MMT). The shape of the adsorption isotherms was correlated with zeta potential values at the adsorption equilibrium. The adsorption properties of both sorbents were studied by voltammetry on carbon paste electrodes (CPE) modified with coal-CTAB and MMT-CTAB system, respectively. Open circuit sorption with differential pulse voltammetry was performed in order to compare the sorption properties of the systems with the unmodified sorbents. The Cu2+ adsorption on BC and MMT decreased to approximately 50 % and 40 %, respectively. The surface adsorption mechanism of CTAB on coal based on hydrophilic interactions was proposed. In the case of montmorillonite, the CTAB intercalation is expected via ion exchange into the inter-layer space forming a double- or triple-layer arrangement.

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High Resolution Replication of Organoclay Surfaces

Proceedings, annual meeting, Electron Microscopy Society of America ◽

10.1017/s0424820100055126 ◽

1982 ◽

Vol 40 ◽

pp. 576-577

Author(s):

W. W. Barker ◽

W. E. Rigsby ◽

V. J. Hurst ◽

W. J. Humphreys

Keyword(s):

Clay Mineral ◽

Organic Molecule ◽

Organic Molecules ◽

X Ray Diffraction ◽

Xrd Pattern ◽

X Ray ◽

Naturally Occurring ◽

Silicate Layers ◽

Mineral Identification

Experimental clay mineral-organic molecule complexes long have been known and some of them have been extensively studied by X-ray diffraction methods. The organic molecules are adsorbed onto the surfaces of the clay minerals, or intercalated between the silicate layers. Natural organo-clays also are widely recognized but generally have not been well characterized. Widely used techniques for clay mineral identification involve treatment of the sample with H2 O2 or other oxidant to destroy any associated organics. This generally simplifies and intensifies the XRD pattern of the clay residue, but helps little with the characterization of the original organoclay. Adequate techniques for the direct observation of synthetic and naturally occurring organoclays are yet to be developed.

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