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<div class="moz-cite-prefix"><font size="2" face="Helvetica, Arial,
sans-serif"><font size="2" face="Helvetica, Arial, sans-serif">(Desculpas
para aqueles que recebem em duplicado)<br>
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PRIMEIRA SESSÃO DOS ENCONTROS COM A CIÊNCIA 2014<br>
<img alt="" src="cid:part1.06020709.02010808@eq.uc.pt"
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<font size="2"><font size="2">9 Abr</font></font><font
size="2"><font size="2"> 2</font></font>01<font size="2">4</font>,
14h15-15h15<br>
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</font></font><font face="Helvetica, Arial, sans-serif"><font
face="Helvetica, Arial, sans-serif">Os Encontros com a Ciência
do CIEPQPF, Departamento de Engenharia Química, Universidade
de Coimbra estão de volta! Anexo programa completo para 2014,
com 8 sessões previstas dentro do leque alargado de interesses
do nosso centro de investigação. representados. A primeira
sessão é já <u><b>na próxima quarta-feira</b></u>, com a Ana
Sofia Fajardo (abstract segue abaixo). Não percam. No sítio e
hora do costume. Até lá,</font></font><font size="2"
face="Helvetica, Arial, sans-serif"><font size="2"
face="Helvetica, Arial, sans-serif"><br>
<br>
Fernando Bernardo<br>
<br>
<br>
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<p class="MsoNormal"><b style="mso-bidi-font-weight:normal"><span
style="mso-ansi-language:EN-GB" lang="EN-GB">Electrocoagulation:
a new approach to treat wastewaters<a moz-do-not-send="true"
name="_GoBack"></a><o:p></o:p></span></b></p>
<p class="MsoNormal"><span style="mso-ansi-language:EN-GB"
lang="EN-GB"><o:p><b>Ana Sofia Fajardo</b><br>
</o:p></span><span style="mso-ansi-language:EN-GB"
lang="EN-GB">Olive mill wastewaters are mainly produced in
Mediterranean countries and contain phenolic mixtures in their
composition. These compounds incorporate a significant
contaminant load due to their high toxicity, refractory
character and high stability in water. These factors do not
allow an efficient application of biological treatments so
that the recourse for chemical purification methods is
requested before the effluents’ discharge into the aquatic
environment.<o:p></o:p></span> </p>
<p class="MsoNormal"><span style="mso-ansi-language:EN-GB"
lang="EN-GB">Electrochemical processes appear as interesting
alternatives to conventional systems to treat wastewaters,
allowing a great efficacy in the removal of organic compounds.
Among these technologies is electrocoagulation (EC), easy to
operate, requiring low equipment costs, not needing high
temperature and pressure. In the EC system, sacrificial anodes
dissolve into the aquatic medium leading to the generation of
metal ions which are hydrolysed to produce metal hydroxide
ions. The in-situ generation of coagulants has the advantage
of not being required the introduction of chemical reagents to
the system. <o:p></o:p></span></p>
<p class="MsoNormal"><span style="mso-ansi-language:EN-GB"
lang="EN-GB">The electrocoagulation process has begun to be
successfully applied to the treatment of olive mill
wastewaters with the aid of anodes of aluminium or iron
material. <o:p></o:p></span></p>
<p class="MsoNormal"><span style="mso-ansi-language:EN-GB"
lang="EN-GB">The main objective of this research was to
compare the effect of Al, Fe, Cu, Pb and Zn anode materials on
the treatment of a mixture of six phenolic acids usually
present in olive mill wastewaters. The assessment of their
activity is given in terms of Total Phenolic Content (TPh),
Chemical Oxygen Demand (COD), Biochemical Oxygen Demand (BOD<sub>5</sub>)
removal and effluent toxicity. Furthermore, the dissolution of
electrodes and the electrical energy consumption will also be
attained. During the treatment process, it seems that beyond
the electrocoagulation route, the electrooxidation of organic
compounds is possibly to occur since the results appear to
indicate the formation of by-products more recalcitrant than
the parent substances.<o:p></o:p></span></p>
<span style="mso-ansi-language:EN-GB" lang="EN-GB">The
electrochemical alternative used in this research </span><span
class="hps"><span style="mso-ansi-language:EN" lang="EN">opens
the possibility</span></span><span
style="mso-ansi-language:EN" lang="EN"> <span class="hps">of
integration</span> <span class="hps">with other techniques</span>
<span class="hps">to improve</span> <span class="hps">the
performance of the</span> <span class="hps">depuration
systems.</span></span><span style="mso-ansi-language:EN"
lang="EN"><span class="hps"></span></span>
<pre class="moz-signature" cols="72">Fernando Pedro Martins Bernardo
Assistant Professor
Department of Chemical Engineering
University of Coimbra
Pólo II - Rua Sílvio Lima
3030-790 Coimbra
Portugal
Tele: +351-239-798722
Fax: +351-239-798703
<a class="moz-txt-link-abbreviated" href="mailto:bernardo@eq.uc.pt">bernardo@eq.uc.pt</a>
<a class="moz-txt-link-abbreviated" href="http://www.eq.uc.pt/~bernardo">www.eq.uc.pt/~bernardo</a></pre>
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