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<creators>
<creator>
<creatorName>Siminiceanu, I.</creatorName>
<affiliation>Universitatea Tehnica „Gheorghe Asachi“, Iaşi, România</affiliation>
</creator>
<creator>
<creatorName>Marchitan, N.S.</creatorName>
<affiliation>Universitatea de Stat din Moldova, Moldova, Republica</affiliation>
</creator>
<creator>
<creatorName>Duca, G.G.</creatorName>
<affiliation>Universitatea de Stat din Moldova, Moldova, Republica</affiliation>
</creator>
<creator>
<creatorName>Mereuta, A.V.</creatorName>
<affiliation>Universitatea de Stat din Moldova, Moldova, Republica</affiliation>
</creator>
</creators>
<titles>
<title xml:lang='en'>Mathematical models based on thermodynamic equilibrium and kinetics of an ion Exchange process</title>
</titles>
<publisher>Instrumentul Bibliometric National</publisher>
<publicationYear>2010</publicationYear>
<relatedIdentifier relatedIdentifierType='ISSN' relationType='IsPartOf'>0034-7752</relatedIdentifier>
<subjects>
<subject>Dumwald- Wagner</subject>
<subject>Freundlich</subject>
<subject>Ho-McKay</subject>
<subject>Kinetic models</subject>
<subject>Lagergren</subject>
<subject>Langmuir</subject>
<subject>Weber-Morris</subject>
</subjects>
<dates>
<date dateType='Issued'>2010-07-01</date>
</dates>
<resourceType resourceTypeGeneral='Text'>Journal article</resourceType>
<descriptions>
<description xml:lang='en' descriptionType='Abstract'><p>A new adsorbent has been prepared from Amberlite IRA-67 impregnated with the liquid ion- exchanger Amberlite LA-2 dissolved in n- hexane to recover tartaric acid (TA) from aqueous solution. The experiments done on a batch equipment proved the effectiveness of the new material: the separation degree of TA was100% in a contact time less than 30 minutes for the following values of the 6 main factors: solid/ liquid loading &gt; 1 g/L, T= 294 K, initial pH 2.5, initial TA concentration &gt;1 g/L, particle diameter 0.4-1.2 mm, stirring 200 min<sup>-1</sup>. The equilibrium q<sub>e</sub>- c<sub>e</sub>&nbsp;data were better correlated through the Langmuir model (R<sup>2</sup>= 0.9962) compared to the Freundlich one (R<sup>2</sup>= 0.8535). The kinetic curves q- &tau; have been confronted with 4 kinetic models, and the corresponding kinetic constants have been identified. The Final conclusion was that, under the investigated conditions, the slowest step of the process was the intraparticle diffusion.</p></description>
</descriptions>
<formats>
<format>application/pdf</format>
</formats>
</resource>