Electrokinetic remediation of dredged sediments and benefits reuse by solidificaation/stabilisation
Identifieur interne : 000109 ( Hal/Curation ); précédent : 000108; suivant : 000110Electrokinetic remediation of dredged sediments and benefits reuse by solidificaation/stabilisation
Auteurs : Yue Song [France]Source :
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Abstract
This thesis research is devoted to investigate the treatment methods of dredged sediments in order their restoration and valorisation: electroremediation and solidification/stabilization. Two experimental set-up (at two different scales) have been designed and a series of tests were performed under different conditions (electric potential values, opened/closed system, electrolyte solutions: EDTA, EDDS, NTA and Citric Acid). Each chelating agent provides an extraction efficiency for a given metal. The obtained results show that the pH control at the cathode by citric acid and its combinations with a surfactant (Tween 20) can increase the metal removal effect. Moreover, under closed system condition, metal removal efficiency became stronger. The obtained metal removals values within the matrix of sediment under optimal conditions can reach 60%. As regard to the solidification/stabilization, serval formulations (of lime, cement and silica fume) associated to the sediment were tested in order to create a resistant and sustainable material forwarding to be used as a road embankments. The specimen of treated sediment were submitted to severe conditions of temperature and wettability. Leaching tests were carried out on the obtained material in order to assess a capability of used formulations to stabilize pollutant elements contained in the sediment. The obtained results from 12 different formulations showed that the required resistance is obtained with the reasonable proportions of binders, while the sustainability requirement need higher lime content in the formulation.
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Two experimental set-up (at two different scales) have been designed and a series of tests were performed under different conditions (electric potential values, opened/closed system, electrolyte solutions: EDTA, EDDS, NTA and Citric Acid). Each chelating agent provides an extraction efficiency for a given metal. The obtained results show that the pH control at the cathode by citric acid and its combinations with a surfactant (Tween 20) can increase the metal removal effect. Moreover, under closed system condition, metal removal efficiency became stronger. The obtained metal removals values within the matrix of sediment under optimal conditions can reach 60%. As regard to the solidification/stabilization, serval formulations (of lime, cement and silica fume) associated to the sediment were tested in order to create a resistant and sustainable material forwarding to be used as a road embankments. The specimen of treated sediment were submitted to severe conditions of temperature and wettability. Leaching tests were carried out on the obtained material in order to assess a capability of used formulations to stabilize pollutant elements contained in the sediment. The obtained results from 12 different formulations showed that the required resistance is obtained with the reasonable proportions of binders, while the sustainability requirement need higher lime content in the formulation. </div></front></TEI><hal api="V3"><titleStmt><title xml:lang="en">Electrokinetic remediation of dredged sediments and benefits reuse by solidificaation/stabilisation</title><title xml:lang="fr">Traitement électrocinétique des sédiments de dragage et valorisation par solidification/stabilisation</title><author role="aut"><persName><forename type="first">Yue</forename><surname>SONG</surname></persName><email>yuesong@issas.ac.cn</email><idno type="halauthor">1327542</idno><orgName ref="#struct-328503"></orgName><affiliation ref="#struct-415995"></affiliation></author><editor role="depositor"><persName><forename>Yue</forename><surname>SONG</surname></persName><email>yuesong@issas.ac.cn</email></editor></titleStmt><editionStmt><edition n="v1" type="current"><date type="whenSubmitted">2016-04-20 11:22:09</date><date type="whenModified">2016-05-12 03:01:50</date><date type="whenReleased">2016-04-20 14:05:37</date><date type="whenProduced">2016-02-22</date><date type="whenEndEmbargoed">2016-04-20</date><ref type="file" target="https://tel.archives-ouvertes.fr/tel-01304709/document"><date notBefore="2016-04-20"></date></ref><ref type="file" n="1" target="https://tel.archives-ouvertes.fr/tel-01304709/file/the%CC%80se%20de%20song%20.pdf"><date notBefore="2016-04-20"></date></ref></edition><respStmt><resp>contributor</resp><name key="338693"><persName><forename>Yue</forename><surname>SONG</surname></persName><email>yuesong@issas.ac.cn</email></name></respStmt></editionStmt><publicationStmt><distributor>CCSD</distributor><idno type="halId">tel-01304709</idno><idno type="halUri">https://tel.archives-ouvertes.fr/tel-01304709</idno><idno type="halBibtex">song:tel-01304709</idno><idno type="halRefHtml">Génie civil. Normandie Université, France, 2016. Français</idno><idno type="halRef">Génie civil. Normandie Université, France, 2016. Français</idno></publicationStmt><seriesStmt><idno type="stamp" n="CNRS">CNRS - Centre national de la recherche scientifique</idno><idno type="stamp" n="UNIV-LEHAVRE">Université du Havre</idno><idno type="stamp" n="SDE">Sciences De l'Environnement</idno><idno type="stamp" n="GIP-BE">GIP Bretagne Environnement</idno><idno type="stamp" n="COMUE-NORMANDIE">Normandie Université</idno><idno type="stamp" n="GENIECIVIL">Génie Civil</idno></seriesStmt><notesStmt></notesStmt><sourceDesc><biblStruct><analytic><title xml:lang="en">Electrokinetic remediation of dredged sediments and benefits reuse by solidificaation/stabilisation</title><title xml:lang="fr">Traitement électrocinétique des sédiments de dragage et valorisation par solidification/stabilisation</title><author role="aut"><persName><forename type="first">Yue</forename><surname>SONG</surname></persName><email>yuesong@issas.ac.cn</email><idno type="halAuthorId">1327542</idno><orgName ref="#struct-328503"></orgName><affiliation ref="#struct-415995"></affiliation></author></analytic><monogr><imprint><date type="dateDefended">2016-02-22</date></imprint><authority type="institution">Normandie Université, France</authority><authority type="supervisor">Huaqing WANG</authority></monogr></biblStruct></sourceDesc><profileDesc><langUsage><language ident="fr">French</language></langUsage><textClass><keywords scheme="author"><term xml:lang="en"> Dredged sediments</term><term xml:lang="en"> Heavy metals</term><term xml:lang="en">Electroremediation</term><term xml:lang="en"> Solidification/Stabilization</term><term xml:lang="fr">Sédiment de dragage</term><term xml:lang="fr">Solidification/Stabilisation</term><term xml:lang="fr">Éléments traces métalliques</term></keywords><classCode scheme="halDomain" n="spi.gciv">Engineering Sciences [physics]/Civil Engineering</classCode><classCode scheme="halDomain" n="spi.gciv.geotech">Engineering Sciences [physics]/Civil Engineering/Geotechnic</classCode><classCode scheme="halDomain" n="sde.ie">Environmental Sciences/Environmental Engineering</classCode><classCode scheme="halDomain" n="sde">Environmental Sciences</classCode><classCode scheme="halTypology" n="THESE">Theses</classCode></textClass><abstract xml:lang="en">This thesis research is devoted to investigate the treatment methods of dredged sediments in order their restoration and valorisation: electroremediation and solidification/stabilization. Two experimental set-up (at two different scales) have been designed and a series of tests were performed under different conditions (electric potential values, opened/closed system, electrolyte solutions: EDTA, EDDS, NTA and Citric Acid). Each chelating agent provides an extraction efficiency for a given metal. The obtained results show that the pH control at the cathode by citric acid and its combinations with a surfactant (Tween 20) can increase the metal removal effect. Moreover, under closed system condition, metal removal efficiency became stronger. The obtained metal removals values within the matrix of sediment under optimal conditions can reach 60%. As regard to the solidification/stabilization, serval formulations (of lime, cement and silica fume) associated to the sediment were tested in order to create a resistant and sustainable material forwarding to be used as a road embankments. The specimen of treated sediment were submitted to severe conditions of temperature and wettability. Leaching tests were carried out on the obtained material in order to assess a capability of used formulations to stabilize pollutant elements contained in the sediment. The obtained results from 12 different formulations showed that the required resistance is obtained with the reasonable proportions of binders, while the sustainability requirement need higher lime content in the formulation. </abstract><abstract xml:lang="fr">Ce travail de thèse a porté sur l’étude des méthodes de traitement des sédiments de dragage en vue de leur remédiation et leur valorisation : la méthode électrocinétique et la méthode solidification/stabilisation. Deux dispositifs expérimentaux (à deux échelles différentes) ont été développés et une série d’essais électrocinétiques ont été effectués sous différentes conditions (valeurs du potentiel électrique, système ouvert/fermé, solutions d’électrolyte : EDTA, EDDS, NTA et Acide citrique). Chaque chélatant fournit une efficacité d’extraction sur un métal donné. Les résultats obtenus montrent que le contrôle de pH à la cathode par l’acide citrique et l’ajout d’un tensio-actif (Tween 20) peuvent augmenter l’effet de remédiation des métaux. Par ailleurs, lorsque le système est fermé, l’efficacité d’électroremédiation est plus élevée. Les abattements obtenus pour les métaux dans la matrice des sédiments sous des conditions optimales peuvent atteindre 60 %. Pour ce qui est de la solidification/stabilisation, plusieurs formulations (de chaux, de ciment et de fumée de silice) associées au sédiment ont été testées dans le but de reconstituer un matériau résistant et durable dans l’objectif de son utilisation dans les remblais routiers. Les éprouvettes de sédiment traitées ont été soumises à des conditions sévères de température et d’humidité. Des essais de lixiviation ont été effectués sur le matériau obtenu afin de déterminer la capacité des formulations à stabiliser les éléments polluants contenus dans le sédiment. Les résultats obtenus avec 12 différentes formulations ont montré que la résistance requise est obtenue avec des proportions raisonnables d’ajouts, tandis que l’exigence de durabilité nécessite une plus grande proportion de chaux. </abstract></profileDesc></hal></record>Pour manipuler ce document sous Unix (Dilib)
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