首页|Removal of U(VI) and Th(IV) from aqueous solutions by organically modified diatomaceous earth: Evaluation of equilibrium, kinetic and thermodynamic data
Removal of U(VI) and Th(IV) from aqueous solutions by organically modified diatomaceous earth: Evaluation of equilibrium, kinetic and thermodynamic data
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NSTL
Elsevier
<![CDATA[<ce:abstract xmlns:ce="http://www.elsevier.com/xml/common/dtd" xmlns="http://www.elsevier.com/xml/ja/dtd" id="ab0005" xml:lang="en" view="all" class="author"><ce:section-title id="st0005">Abstract</ce:section-title><ce:abstract-sec id="as0005" view="all"><ce:simple-para id="sp0095" view="all">Raw and organically modified diatomaceous earth were used to remove U(VI) and Th(IV) ions from aqueous solution using the batch method. Effects of contact times, dosage of adsorbent, pH, ionic strength and temperature on the adsorption process were studied. The results indicated that the adsorption of these ions was affected by pH and ionic strength. The adsorption isotherms fit the Langmuir, Freundlich and D–R models at different temperature. The kinetic results revealed that pseudo-second-order kinetic model provided the best description of the equilibrium data. Thermodynamic parameters showed the adsorption process was spontaneous and endothermic. The best recovery for U(VI) was obtained when 1.0M EDTA was used as eluent, while for Th(IV) ions when 1.0M HNO<ce:inf loc="post">3</ce:inf>was used.</ce:simple-para></ce:abstract-sec></ce:abstract><ce:abstract xmlns:ce="http://www.elsevier.com/xml/common/dtd" xmlns="http://www.elsevier.com/xml/ja/dtd" id="ab0010" class="graphical" xml:lang="en" view="all"><ce:section-title id="st0010">Graphical abstract</ce:section-title><ce:abstract-sec id="as0010" view="all"><ce:simple-para id="sp0100" view="all">This paper presents the uptake of U(VI) and Th(IV) ions from aqueous solutions by raw and organically modified diatomaceous earth.</ce:simple-para><ce:simple-para>Display Omitted</ce:simple-para></ce:abstract-sec></ce:abstract><ce:abstract xmlns:ce="http://www.elsevier.com/xml/common/dtd" xmlns="http://www.elsevier.com/xml/ja/dtd" id="ab0015" class="author-highlights" xml:lang="en" view="all"><ce:section-title id="st0015">Highlights</ce:section-title><ce:abstract-sec id="as0015" view="all"><ce:simple-para id="sp0105" view="all"><ce:list id="l0005"><ce:list-item id="li0005"><ce:label>?</ce:label><ce:para id="p0005" view="all">Raw and organomodified diatomaceous earth (DT-HDTMA) was utilized as an adsorbent.</ce:para></ce:list-item><ce:list-item id="li0010"><ce:label>?</ce:label><ce:para id="p0010" view="all">It was used for the removal of U(VI) and Th(IV) from aqueous solutions.</ce:para></ce:list-item><ce:list-item id="li0015"><ce:label>?</ce:label><ce:para id="p0015" view="all">Adsorption was well described by the Langmuir, Freundlich and D-R isotherm models.</ce:para></ce:list-item><ce:list-item id="li0020"><ce:label>?</ce:label><ce:para id="p0020" view="all">Adsorption kinetics of these ions was found to conform to pseudo-second order model.</ce:para></ce:list-item><ce:list-item id="li0025"><ce:label>?</ce:label><ce:para id="p0025" view="all">The adsorption of U(VI) and Th(IV) on (DT-HDTMA) is endothermic and spontaneous.</ce:para></ce:list-item></ce:list></ce:simple-para></ce:abstract-sec></ce:abstract>]]>
NSTL
Elsevier
