{"id":6828,"date":"2022-03-25T09:39:14","date_gmt":"2022-03-25T08:39:14","guid":{"rendered":"https:\/\/www.mio.osupytheas.fr\/fr\/thays-thayanne-luz-santos-mio-cem-soutiendra-sa-these-le-lundi-25-avril\/"},"modified":"2022-03-25T09:39:14","modified_gmt":"2022-03-25T08:39:14","slug":"thays-thayanne-luz-santos-mio-cem-will-present-her-thesis-on-monday-25-april","status":"publish","type":"post","link":"https:\/\/www.mio.osupytheas.fr\/en\/thays-thayanne-luz-santos-mio-cem-soutiendra-sa-these-le-lundi-25-avril\/","title":{"rendered":"Thays Thayanne Luz SANTOS (MIO-CEM) will defend her thesis on Monday 25 April."},"content":{"rendered":"
<\/div> <\/div> <\/div>

At 14:00 (France) (09:00 in Brazil)<\/p>

By videoconference at the University of Toulon - La Garde Campus - V 217<\/p>

& in person at the Universidade Federal de Fortaleza - Bloco 901 do Campus do Pici - Sala De Videoconfer\u00eancia Do Instituto UFC Virtual (09:00)<\/p>

On the following subject: Geochemistry of trace metals and organic matter in equatorial estuaries in north-eastern Brazil<\/p>

before a jury made up of<\/p>

\u00a0<\/p>

Ms M\u00e9lanie DAVRANCHE, University Professor, University of Rennes 1 (France), Rapporteur<\/p>

\u00a0<\/p>

Mr Carlos Eduardo de REZENDE, University Professor, Universidade Estadual do Norte Fluminense Darcy Ribeiro (Brazil), Rapporteur<\/p>

\u00a0<\/p>

Mr Luiz Drude LACERDA, University Professor, Universidate Federal do Ceara - UFC Labomar (Brazil), Examiner<\/p>

\u00a0<\/p>

Ms Florence VOUVE, Senior Lecturer, University of Perpignan (France), Examiner<\/p>

\u00a0<\/p>

Ms Rozane Valente MARINS, University Professor, Universidate Federal do Ceara - UFC Labomar (Brazil), Thesis co-supervisor<\/p>

\u00a0<\/p>

Mr St\u00e9phane MOUNIER, Senior Lecturer (HDR), University of Toulon (France), Thesis co-supervisor<\/p>

Abstract<\/p>

The present work hypothesizes that trace metals from natural and non-natural sources may be controlled by the dissolved organic matter (DOM) of the mangrove forest, which acts as a geochemical transporter that regulates the distribution, mobility and possible toxicity to biota under geochemical effect. and hydrodynamic conditions of the tropical estuary of the Parna\u00edba River Delta (PRD). A sampling campaign was carried out in December 2019 to collect groundwater in order to obtain the particulate, dissolved and colloidal fractions. The environmental quality index results for trace metals identified moderate to highly contaminated Zn enrichment in the particulate fraction. Trace metals in the particulate fraction showed an increase in desorption from the dissolved fraction with increasing salinity, as observed mainly for Ba and Zn. This behaviour was evident from the distribution coefficient, which indicated potential mobility for Ba, Zn and Cu. The DOM showed a composition of humic substances of terrestrial (peaks A+C) and marine (peak M) origin. The complexation capacity showed a strong interaction of DOM with Cu at the Mangrove Channel stations, suggesting a lower availability of the metal in the water column. Therefore, the present study characterised the importance of mangrove DOM in controlling trace metal partitioning in the tropical estuarine system, as this DRP case study.<\/p><\/div><\/div><\/div> <\/div> <\/div> <\/div> <\/div> <\/div><\/div>","protected":false},"excerpt":{"rendered":"

A 14h00 (France) (09h00 au Br\u00e9sil)En visioconf\u00e9rence \u00e0 l’Universit\u00e9 de Toulon \u2013 Campus La Garde – V 217& en pr\u00e9sentiel \u00e0 l\u2019Universidade Federal de Fortaleza – B\u00e2timent Bloco 901 do […]<\/p>\n","protected":false},"author":1,"featured_media":4489,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[1],"tags":[],"class_list":["post-6828","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-actualites"],"acf":[],"_links":{"self":[{"href":"https:\/\/www.mio.osupytheas.fr\/en\/wp-json\/wp\/v2\/posts\/6828","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.mio.osupytheas.fr\/en\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.mio.osupytheas.fr\/en\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.mio.osupytheas.fr\/en\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.mio.osupytheas.fr\/en\/wp-json\/wp\/v2\/comments?post=6828"}],"version-history":[{"count":0,"href":"https:\/\/www.mio.osupytheas.fr\/en\/wp-json\/wp\/v2\/posts\/6828\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.mio.osupytheas.fr\/en\/wp-json\/wp\/v2\/media\/4489"}],"wp:attachment":[{"href":"https:\/\/www.mio.osupytheas.fr\/en\/wp-json\/wp\/v2\/media?parent=6828"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.mio.osupytheas.fr\/en\/wp-json\/wp\/v2\/categories?post=6828"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.mio.osupytheas.fr\/en\/wp-json\/wp\/v2\/tags?post=6828"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}