@article{article_339525, title={Investigation of the Kinetic and Thermodynamic Properties of U(VI) Ions onto Raw and Modified Diatomite}, journal={Celal Bayar University Journal of Science}, volume={13}, pages={761–768}, year={2017}, DOI={10.18466/cbayarfbe.339525}, author={Yuşan, Sabriye}, keywords={Adsorpsiyon,Diyatomit,Kinetik parametreler,Termodinamik parametreler}, abstract={<p align="justify"> <font color="#000000"> <span style="line-height:115%;font-family:’Times New Roman’, serif;font-size:10pt;">In this study, the
removal of uranium from aqueous solutions by natural and modified diatomite has
been investigated. SEM, XRD and TGA/DTA analysis techniques were used for the
characterization of natural and acid modified diatomite samples as adsorbents. The
adsorption process was examined kinetically according to obtained data from
adsorption studies at three different concentrations, and it was found
adsorption process was best described by the pseudo-second-order model with
chemical adsorption. The effect of temperature on the adsorption was also
examined </span> <span style="line-height:115%;font-family:’Times New Roman’, serif;font-size:11pt;"> </span> <span style="line-height:115%;font-family:’Times New Roman’, serif;font-size:10pt;">and
thermodynamic parameters were calculated. Positive enthalpy calculated for both
adsorbents have shown that the adsorption process is endothermic. In addition
negative values of free energy change indicated the spontaneity of the
adsorption at the studied temperatures. The positive values of entropy show the
increasing randomness at the solid/solution interface during the adsorption
process. </span> </font> <br /> </p>}, number={3}, publisher={Manisa Celal Bayar Üniversitesi}