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<p class="MsoTitle" style="margin:0cm;margin-bottom:.0001pt"><span style="font-size:9.0pt;font-family:"Verdana","sans-serif";color:black;font-weight:normal"><o:p> </o:p></span></p>
<p class="MsoTitle" style="margin:0cm;margin-bottom:.0001pt"><span style="font-size:18.0pt;font-family:"Verdana","sans-serif";color:black;font-weight:normal">VABILO NA INŠTITUTSKO PREDAVANJE / INVITATION TO THE INSTITUTE LECTURE<o:p></o:p></span></p>
<p class="MsoNormal" align="center" style="text-align:center"><b><span style="font-size:20.0pt;font-family:"Verdana","sans-serif""><o:p> </o:p></span></b></p>
<p class="MsoNormal" align="center" style="text-align:center"><b><span style="font-size:20.0pt;font-family:"Verdana","sans-serif"">Prof. dr. Patricia Haure<o:p></o:p></span></b></p>
<p class="MsoNormal" align="center" style="text-align:center"><i><span lang="EN-US" style="font-size:12.0pt;font-family:"Calibri","sans-serif""><o:p> </o:p></span></i></p>
<p class="MsoNormal" align="center" style="text-align:center"><i><span lang="EN-US" style="font-size:12.0pt;font-family:"Calibri","sans-serif"">Dpto. de Ingeniería Química/Div. Catalizadores y Superficies – INTEMA – CONICET /<o:p></o:p></span></i></p>
<p class="MsoNormal" align="center" style="text-align:center"><i><span lang="EN-US" style="font-size:12.0pt;font-family:"Calibri","sans-serif"">Universidad Nacional de Mar del Plata,Mar del Plata 7600, Argentina;
<u><a href="mailto:phaure@fi.mdp.edu.ar"><span style="color:windowtext">phaure@fi.mdp.edu.ar</span></a>
<o:p></o:p></u></span></i></p>
<p class="MsoNormal" align="center" style="text-align:center"><i><span lang="EN-US" style="font-size:12.0pt;font-family:"Calibri","sans-serif""><o:p> </o:p></span></i></p>
<p class="MsoNormal" align="center" style="text-align:center;line-height:150%"><b><span style="font-size:16.0pt;line-height:150%;font-family:"Verdana","sans-serif""><o:p> </o:p></span></b></p>
<p class="MsoNormal" align="center" style="text-align:center;line-height:150%"><b><span style="font-size:16.0pt;line-height:150%;font-family:"Verdana","sans-serif"">četrtek / Thursday, 30. 07. 2015, ob / at 13:00<o:p></o:p></span></b></p>
<h6 style="margin:0cm;margin-bottom:.0001pt"><span lang="EN-GB" style="font-size:14.0pt;font-family:"Verdana","sans-serif"">Velika predavalnica Kemijskega inštituta / Lecture Hall at the National Institute of Chemistry; Hajdrihova 19, Ljubljana
<o:p></o:p></span></h6>
<p class="MsoTitle" style="margin:0cm;margin-bottom:.0001pt"><span lang="EN-GB" style="font-size:14.0pt;mso-fareast-language:EN-US;font-weight:normal"><o:p> </o:p></span></p>
<p class="MsoNormal" style="text-align:justify"><b><span lang="EN-GB" style="font-size:18.0pt;font-family:"Verdana","sans-serif";color:#993366"><o:p> </o:p></span></b></p>
<p class="MsoNormal" align="center" style="text-align:center"><b><span lang="EN-GB" style="font-size:18.0pt;font-family:"Verdana","sans-serif";color:#993366">Natural Diatomites: Efficient Green Catalyst for Fenton-like Oxidation of Orange II<o:p></o:p></span></b></p>
<p class="MsoNormal"><span lang="EN-GB" style="color:black"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-GB" style="color:black">Abstract:<o:p></o:p></span></p>
<p class="MsoNormal" style="text-align:justify;text-indent:14.2pt"><span lang="EN-GB" style="font-size:11.0pt;color:black">Our group is involved in the development of new catalytic materials and treatment technologies for the decontamination of liquid effluents
through Fenton-like processes. Particularly, we are interested in the use of natural, low cost materials such as diatomites or pumice as Fenton-like catalysts for oxidation of phenol and azo-compounds.<o:p></o:p></span></p>
<p class="MsoNormal" style="text-align:justify;text-indent:14.2pt"><span lang="EN-GB" style="font-size:11.0pt;color:black">In this presentation, the
</span><span lang="EN-US" style="font-size:11.0pt">Fenton-like oxidation of the anionic azo-dye Orange II (100-500 mg/L) is catalyzed using commercial grade diatomites (3.5 % Fe content) thermally treated.<o:p></o:p></span></p>
<p class="MsoNormal" style="text-align:justify;text-indent:14.2pt"><span lang="EN-US" style="font-size:11.0pt">Solid samples were thoroughly characterized by several techniques. Peroxidation experiments were performed varying the diatomite calcination temperature
(500, 700 and 1000 °C), reaction temperature (50, 60, 70 and 80 °C), catalyst load (0.47, 0.94, 1.89 and 3.78 g), H<sub>2</sub>O<sub>2</sub> concentration (11.0, 13.7 and 20.6 mmol/L) and dosing, pH value (2-4) and initial dye concentration (0.28, 0.57 and
1.43 mmol/L). The influence of NaCl and oxalic acid on the catalytic performance and stability was also addressed.<o:p></o:p></span></p>
<p class="MsoNormal" style="text-align:justify;text-indent:14.2pt"><span lang="EN-US" style="font-size:11.0pt">The best results were obtained at 70 °C, initial pH value equal to 3 and using the stoichiometric amount of H<sub>2</sub>O<sub>2</sub>, since complete
decoloration, TOC reduction close to 67 % and negligible Fe leaching were achieved with samples calcined at 700 °C. The catalyst used in consecutive runs yielded similar performance in terms of decoloration and TOC reduction.<o:p></o:p></span></p>
<p class="MsoNormal" style="text-align:justify;text-indent:14.2pt"><span lang="EN-GB" style="font-size:11.0pt">Overall, the performance of this natural material was
</span><span lang="EN-US" style="font-size:11.0pt">comparable or even better than data reported in the literature using more complex and expensive catalysts and less concentrated solutions.<o:p></o:p></span></p>
<p class="MsoNormal" style="text-align:justify;text-indent:14.2pt"><span lang="EN-US" style="font-size:11.0pt;color:black"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="FR"><o:p> </o:p></span></p>
<p class="MsoNormal" align="center" style="text-align:center"><b><span lang="EN-US" style="font-size:12.0pt;font-family:"Arial","sans-serif";mso-fareast-language:SL">Vljudno vabljeni! / Kindly invited!<o:p></o:p></span></b></p>
<p class="MsoNormal"><span lang="EN-US" style="font-family:"Verdana","sans-serif""><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="FR" style="font-size:11.0pt;font-family:"Calibri","sans-serif""><o:p> </o:p></span></p>
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