Application of Brazilian kaolinite clay as adsorbent to removal of U(VI) from aqueous solution: Kinetic and thermodynamic of cation-basic interactions

Journal Article · Sat May 15 00:00:00 EDT 2010 · Journal of Solid State Chemistry

DOI:https://doi.org/10.1016/j.jssc.2010.03.021· OSTI ID:21372603

Leidens, Victor L; Viana, Rubia R ^[1]; Airoldi, Claudio ^[2]

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1. Universidade Federal de Mato Grosso, UFMT, Centro de Recursos Minerais, Cuiaba 78060 900, Mato Grosso (Brazil)
2. Chemistry Institute, State University of Campinas, P.O. Box 6154, 13084-971 Campinas, Sao Paulo (Brazil)

The compound N{sup 1}-[3-(trimethoxysilyl)propyl]diethylenetriamine was anchored onto Amazon kaolinite surface by heterogeneous route. The modified and natural kaolinite samples were characterized by transmission electron microscopy, scanning electron microscopic, X-ray diffraction, and nuclear magnetic nuclei of {sup 29}Si and {sup 13}C. The well-defined peaks obtained in the {sup 13}C NMR spectrum in the 5.0-62.1 ppm region confirmed the attachment of organic functional groups as pendant chains bonded into the porous clay. The ability of these materials to remove U(VI) from aqueous solution was followed by a series of adsorption isotherms adjusted to a Sips equation at room temperature and pH 4.0. The kinetic parameters analyzed by the Lagergren and Elovich models gave a good fit for a pseudo-second order reaction with k{sub 2} values 16.0 and 25.1 mmol g{sup -1} min{sup -1} ranges for natural and modified kaolinite clays, respectively. The energetic effects caused by metal ion adsorption were determined through calorimetric titrations. - Graphical abstract: This investigation reports the use of original and modified kaolinites as alternative absorbents. The compound N-[3-trimethoxysilyl)propyl]diethylenetriamine was anchored onto Amazon kaolinite surface by heterogeneous route.

• OSTI ID: 21372603
• Journal Information: Journal of Solid State Chemistry, Vol. 183, Issue 5; Other Information: DOI: 10.1016/j.jssc.2010.03.021; PII: S0022-4596(10)00111-8; Copyright (c) 2010 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved.; ISSN 0022-4596
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC
ORGANIC
PHYSICAL AND ANALYTICAL CHEMISTRY
ADSORPTION
ADSORPTION ISOTHERMS
AMINES
AQUEOUS SOLUTIONS
BASIC INTERACTIONS
CALORIMETRY
CATIONS
CLAYS
KAOLINITE
NMR SPECTRA
ORGANIC SILICON COMPOUNDS
POROUS MATERIALS
SCANNING ELECTRON MICROSCOPY
TEMPERATURE RANGE 0273-0400 K
TITRATION
TRANSMISSION ELECTRON MICROSCOPY
URANIUM COMPOUNDS
X-RAY DIFFRACTION
ACTINIDE COMPOUNDS
CHARGED PARTICLES
CHEMICAL ANALYSIS
COHERENT SCATTERING
DIFFRACTION
DISPERSIONS
ELECTRON MICROSCOPY
HOMOGENEOUS MIXTURES
INTERACTIONS
IONS
ISOTHERMS
MATERIALS
MICROSCOPY
MINERALS
MIXTURES
ORGANIC COMPOUNDS
QUANTITATIVE CHEMICAL ANALYSIS
SCATTERING
SILICATE MINERALS
SOLUTIONS
SORPTION
SPECTRA
TEMPERATURE RANGE
VOLUMETRIC ANALYSIS