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Partager le résultat de cette recherche Interroger des sources externesQualité physico-chimique, pollution organique et métalliquedes compartiments Eau / Sédiments de l’Oued Rhumel,et des barrages Hammam Grouz et Beni Haroun / Meriem Melghit
Titre : Qualité physico-chimique, pollution organique et métalliquedes compartiments Eau / Sédiments de l’Oued Rhumel,et des barrages Hammam Grouz et Beni Haroun Type de document : texte imprimé Auteurs : Meriem Melghit, Auteur ; F. Zohra Afri-Mehennaoui, Directeur de thèse Editeur : Constantine : Université Mentouri Constantine Année de publication : 2012 Importance : 176 f. Format : 31 cm. Note générale : 2 copies imprimées disponibles Langues : Français (fre) Tags : Contamination Qualité Physico-chimie Eau Sédiments ETM Pollution Physical Chemistry Water Sediment Trace metals Index. décimale : 570 Sciences de la vie. Biologie Résumé : This study is part of the context of a multidisciplinary research on terrestrial and aquatic ecosystems. To assess the quality of water of the Rhumelwadi, its tributaries and the water dams HammamGrouzand BeniHaroun, to the organic pollution and possible metal contamination, we conducted for water and sediment compartments a set of physico-chemical approaches: physical and chemical parameters, major mineral elements, pollution parameters and dosage of five ETM (Cd, Cr, Cu, Pb and Zn). This research involved five sampling points for the water compartment, both located at the two dams GrouzHammam and BeniHaroun,
and three on the Rhumelwadi, collected twelve times during 2009. For the sediment compartment, sixteen sampling points were selected in strategic locations and sampled twice during the month of January 2010 and April 2010. The set of parameters determined showed organic pollution characterized by fair to poor quality water from the wadiRhumel. Metallic contamination evaluated by SEM is almost negligible dissolved in water but fairly abundant in sediments which could cause high toxicity for aquatic fauna and flora, mainly marked by
levels of Cd, Cr, Zn and Pb higher than the estimated natural levels. The waters of dams HammamGrouzandBeniHaroun are exposed to pollution from various sources (urban,industrial and agricultural ...) despite treatment of wastewater in STEP. Their sediments show a significant metal contamination. A similar situation is observed for the waters of
Rhumelwadi and its tributaries, where the degree of pollution is important.
To remedy this problem, it would be important to better exploit the wastewater treatment plants, a wastewater collection and mastered most comprehensive, well while managing industrial and municipal discharges, which undoubtedly constitute a major threat to ecosystems aquatic. The purified water supply Rhumelwadi, its tributaries and therefore the
two dams HammamGrouzandBeniHaroun. They contribute to the reduced risk of organic pollution and heavy metal contamination of water and sediment compartments, and water conservation for serene life (better water management).
Diplôme : Magistère En ligne : ../theses/biologie/MEL6203.pdf Format de la ressource électronique : Permalink : https://bu.umc.edu.dz/md/index.php?lvl=notice_display&id=6174 Qualité physico-chimique, pollution organique et métalliquedes compartiments Eau / Sédiments de l’Oued Rhumel,et des barrages Hammam Grouz et Beni Haroun [texte imprimé] / Meriem Melghit, Auteur ; F. Zohra Afri-Mehennaoui, Directeur de thèse . - Constantine : Université Mentouri Constantine, 2012 . - 176 f. ; 31 cm.
2 copies imprimées disponibles
Langues : Français (fre)
Tags : Contamination Qualité Physico-chimie Eau Sédiments ETM Pollution Physical Chemistry Water Sediment Trace metals Index. décimale : 570 Sciences de la vie. Biologie Résumé : This study is part of the context of a multidisciplinary research on terrestrial and aquatic ecosystems. To assess the quality of water of the Rhumelwadi, its tributaries and the water dams HammamGrouzand BeniHaroun, to the organic pollution and possible metal contamination, we conducted for water and sediment compartments a set of physico-chemical approaches: physical and chemical parameters, major mineral elements, pollution parameters and dosage of five ETM (Cd, Cr, Cu, Pb and Zn). This research involved five sampling points for the water compartment, both located at the two dams GrouzHammam and BeniHaroun,
and three on the Rhumelwadi, collected twelve times during 2009. For the sediment compartment, sixteen sampling points were selected in strategic locations and sampled twice during the month of January 2010 and April 2010. The set of parameters determined showed organic pollution characterized by fair to poor quality water from the wadiRhumel. Metallic contamination evaluated by SEM is almost negligible dissolved in water but fairly abundant in sediments which could cause high toxicity for aquatic fauna and flora, mainly marked by
levels of Cd, Cr, Zn and Pb higher than the estimated natural levels. The waters of dams HammamGrouzandBeniHaroun are exposed to pollution from various sources (urban,industrial and agricultural ...) despite treatment of wastewater in STEP. Their sediments show a significant metal contamination. A similar situation is observed for the waters of
Rhumelwadi and its tributaries, where the degree of pollution is important.
To remedy this problem, it would be important to better exploit the wastewater treatment plants, a wastewater collection and mastered most comprehensive, well while managing industrial and municipal discharges, which undoubtedly constitute a major threat to ecosystems aquatic. The purified water supply Rhumelwadi, its tributaries and therefore the
two dams HammamGrouzandBeniHaroun. They contribute to the reduced risk of organic pollution and heavy metal contamination of water and sediment compartments, and water conservation for serene life (better water management).
Diplôme : Magistère En ligne : ../theses/biologie/MEL6203.pdf Format de la ressource électronique : Permalink : https://bu.umc.edu.dz/md/index.php?lvl=notice_display&id=6174 Exemplaires
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Titre : "Spéciation du Phosphore dans des Sédiments Aquatiques Optimisation Analytique Application Environnementale" Type de document : texte imprimé Auteurs : Sarah Azzouz, Auteur ; Chahrazed Boukhalfa, Directeur de thèse Editeur : constantine [Algérie] : Université Constantine 1 Année de publication : 2014 Importance : 132 f. Format : 30 cm. Note générale : 2 copies imprimées disponibles
Langues : Français (fre) Tags : phosphore sédiment spéciation adsorption mobilité Rhumel Boumerzoug El-kebir
phosphorus sediment speciation mobility El-kebirIndex. décimale : 540 Chimie et sciences connexes Résumé : "In this study, sediments samples were collected at three oueds in the north-east Algeria: oued
El-Kebir, oued Boumerzoug and oued Rhumel.
The mineralogical composition of the sediments was evaluated by X-ray fluorescence and
Infrared analysis. The contents of metals Al, Ca, Fe, Mn, organic matter and total phosphorus
were determined. Generally, the studied sediments are characterized by an alkaline pH, a high
electrical conductivity and significant contents of organic matter. The X-ray fluorescence
shows that the main components of the sediment matrix are calcium in major part, iron,
silicon and aluminum. The infrared spectra show the presence of carbonates, goethite and
Kaolinite.
The evaluation of the phosphorus retention in the sediments of the three oueds was assessed
by fractionation and adsorption tests. The obtained results show that phosphorus is mainly in
inorganic form with prevalence of calcic fraction. The phosphorus retention depends on the
samples composition. The sediments of oued El-Kebir retain more phosphorus than those of
oued Boumerzoug and Rhumel.
In a relation with the sediments composition and the method of phosphorus determination, a
phosphorus extraction scheme is proposed in this study by optimizing the used reagents and
the operating conditions.
By applying this extraction scheme, the spatiotemporal evolution of phosphorus speciation
during the year 2012, was studied in the sediments of the rivers which cross Constantine city:
oued Rhumel and its tributary Boumerzoug.
In the sediments of the two streams, the results show the predominance of the residual
fraction and the importance of phosphorus bound to detrital apatite. The evolution of the
exchangeable fraction and that related to authigenic apatite depends on the pH of the
sediments. The reducible fraction is characterized by a significant spatiotemporal evolution.
At the end of the summer period, the contribution of the residual organic fraction is less
significant.
Spatiotemporal changes in the distribution and the mobility of phosphorus are recorded in the
sediments of oued Rhumel. In those of oued Boumerzoug, phosphorus is more mobile in the
winter and spring."
Diplôme : Doctorat En ligne : ../theses/chimie/AZZ6500.pdf Format de la ressource électronique : Permalink : https://bu.umc.edu.dz/md/index.php?lvl=notice_display&id=9614 "Spéciation du Phosphore dans des Sédiments Aquatiques Optimisation Analytique Application Environnementale" [texte imprimé] / Sarah Azzouz, Auteur ; Chahrazed Boukhalfa, Directeur de thèse . - constantine (Route ain el bey, Algérie) : Université Constantine 1, 2014 . - 132 f. ; 30 cm.
2 copies imprimées disponibles
Langues : Français (fre)
Tags : phosphore sédiment spéciation adsorption mobilité Rhumel Boumerzoug El-kebir
phosphorus sediment speciation mobility El-kebirIndex. décimale : 540 Chimie et sciences connexes Résumé : "In this study, sediments samples were collected at three oueds in the north-east Algeria: oued
El-Kebir, oued Boumerzoug and oued Rhumel.
The mineralogical composition of the sediments was evaluated by X-ray fluorescence and
Infrared analysis. The contents of metals Al, Ca, Fe, Mn, organic matter and total phosphorus
were determined. Generally, the studied sediments are characterized by an alkaline pH, a high
electrical conductivity and significant contents of organic matter. The X-ray fluorescence
shows that the main components of the sediment matrix are calcium in major part, iron,
silicon and aluminum. The infrared spectra show the presence of carbonates, goethite and
Kaolinite.
The evaluation of the phosphorus retention in the sediments of the three oueds was assessed
by fractionation and adsorption tests. The obtained results show that phosphorus is mainly in
inorganic form with prevalence of calcic fraction. The phosphorus retention depends on the
samples composition. The sediments of oued El-Kebir retain more phosphorus than those of
oued Boumerzoug and Rhumel.
In a relation with the sediments composition and the method of phosphorus determination, a
phosphorus extraction scheme is proposed in this study by optimizing the used reagents and
the operating conditions.
By applying this extraction scheme, the spatiotemporal evolution of phosphorus speciation
during the year 2012, was studied in the sediments of the rivers which cross Constantine city:
oued Rhumel and its tributary Boumerzoug.
In the sediments of the two streams, the results show the predominance of the residual
fraction and the importance of phosphorus bound to detrital apatite. The evolution of the
exchangeable fraction and that related to authigenic apatite depends on the pH of the
sediments. The reducible fraction is characterized by a significant spatiotemporal evolution.
At the end of the summer period, the contribution of the residual organic fraction is less
significant.
Spatiotemporal changes in the distribution and the mobility of phosphorus are recorded in the
sediments of oued Rhumel. In those of oued Boumerzoug, phosphorus is more mobile in the
winter and spring."
Diplôme : Doctorat En ligne : ../theses/chimie/AZZ6500.pdf Format de la ressource électronique : Permalink : https://bu.umc.edu.dz/md/index.php?lvl=notice_display&id=9614 Exemplaires
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Titre : Etude macroscopique et spectroscopique de la fixation des Ions phosphate sur les oxyhydroxydes de Fer -Application aux sédiments aquatiques Type de document : texte imprimé Auteurs : Lamia Boukemara, Auteur ; Chahrazed Boukhalfa- Djebbar, Directeur de thèse Editeur : جامعة الإخوة منتوري قسنطينة Année de publication : 2017 Importance : 172 f. Format : 30 cm. Note générale : 2 copies imprimées disponibles
Langues : Français (fre) Tags : Phosphate Adsorption Ferrihydrite Goethite Hématite Sédiments Analyse spectroscopique DRIFT Phosphorus Hematite Sediment Spectroscopic analysis DRIFT ?????? ?????? ???????? ???????????????? ?????? ??????? ???????? ?????????
???????Index. décimale : 540 Chimie et sciences connexes Résumé : The present study is a contribution to the evaluation of the adsorbing properties of
iron oxyhydroxides (Ferrihydrite, Goethite and Hematite) towards phosphate ions. As
application, the evaluation of the retention of phosphate by mining sediments was
evaluated. Ferrihydrite, goethite and hematite were prepared in laboratory. The used
sediments came from a mining site located in the North-eastern of Algeria in the region
of Oum Toub.
The prepared iron oxyhydroxides and sediment samples were characterized by DRX,
DRIFT, SEM, BET, PZC, TGA, DSC and particles size analysis,. The obtained results
show that ferrihydrite has the highest surface area and particles size with the
predominance of micropores. Goethite and hematite are characterized by the presence of
mesopores. The sampled sediments consist essentially of quartz, jarosite, kaolinite,
schwertmannite and goethite.
Phosphate sorption was studied through macroscopics and spectroscopics analysis. The
macroscopic experiments were carried out in batch in order to determine the effects of
various parameters. Equilibrium and thermodynamic studies were performed.
The macroscopic results show that the phosphate ions fixation on the prepared iron
oxyhydroxides is strongly related to the pH; it is significant at acidic pH (pH <5). The
phosphate adsorption capacities of the iron oxyhydroxides follow the order:
Ferrihydrite> Goethite> Hematite. The calculated thermodynamic parameters show that
the adsorption process is endothermic in the case of ferrihydrite and exothermic in the
cases of goethite and hematite. The effects of the presence of foreign ions depend on the
nature of the ion and the iron oxyhydroxide. At pH <7, a decrease in the binding of
phosphate ions is recorded in the presence of Cd (II) ions in the case of goethite and
hematite. In the presence of Cu (II), Pb (II) and Cd (II), a clear improvement in the
binding is recorded in the case of ferrihydrite at pH> 7. In aquatic environment, the
phosphate uptake by the mining sediments is related to their composition. The
predominance of amorphous iron oxyhydroxides implies better adsorption. However,
that of quartz causes a decrease in the fixing rate.
The spectroscopic analysis (DRIFT) show that in the absence of competitive ions,
phosphates form inner sphere complexes with the symmetry C3v in the case of
ferrihydrite and the symmetry C2v in the case of goethite and hematite. The presence of
chromate and oxalate ions involves a modification of the mechanism of phosphate ions
retention. In the presence of cations, the formation of ternary complexes is shown in the
case of ferrihydrite. In mining sediments, phosphate replaces sulphate in shwertmannite.
Diplôme : Doctorat en sciences En ligne : ../theses/chimie/BOU7050.pdf Format de la ressource électronique : Permalink : https://bu.umc.edu.dz/md/index.php?lvl=notice_display&id=10550 Etude macroscopique et spectroscopique de la fixation des Ions phosphate sur les oxyhydroxydes de Fer -Application aux sédiments aquatiques [texte imprimé] / Lamia Boukemara, Auteur ; Chahrazed Boukhalfa- Djebbar, Directeur de thèse . - [S.l.] : جامعة الإخوة منتوري قسنطينة, 2017 . - 172 f. ; 30 cm.
2 copies imprimées disponibles
Langues : Français (fre)
Tags : Phosphate Adsorption Ferrihydrite Goethite Hématite Sédiments Analyse spectroscopique DRIFT Phosphorus Hematite Sediment Spectroscopic analysis DRIFT ?????? ?????? ???????? ???????????????? ?????? ??????? ???????? ?????????
???????Index. décimale : 540 Chimie et sciences connexes Résumé : The present study is a contribution to the evaluation of the adsorbing properties of
iron oxyhydroxides (Ferrihydrite, Goethite and Hematite) towards phosphate ions. As
application, the evaluation of the retention of phosphate by mining sediments was
evaluated. Ferrihydrite, goethite and hematite were prepared in laboratory. The used
sediments came from a mining site located in the North-eastern of Algeria in the region
of Oum Toub.
The prepared iron oxyhydroxides and sediment samples were characterized by DRX,
DRIFT, SEM, BET, PZC, TGA, DSC and particles size analysis,. The obtained results
show that ferrihydrite has the highest surface area and particles size with the
predominance of micropores. Goethite and hematite are characterized by the presence of
mesopores. The sampled sediments consist essentially of quartz, jarosite, kaolinite,
schwertmannite and goethite.
Phosphate sorption was studied through macroscopics and spectroscopics analysis. The
macroscopic experiments were carried out in batch in order to determine the effects of
various parameters. Equilibrium and thermodynamic studies were performed.
The macroscopic results show that the phosphate ions fixation on the prepared iron
oxyhydroxides is strongly related to the pH; it is significant at acidic pH (pH <5). The
phosphate adsorption capacities of the iron oxyhydroxides follow the order:
Ferrihydrite> Goethite> Hematite. The calculated thermodynamic parameters show that
the adsorption process is endothermic in the case of ferrihydrite and exothermic in the
cases of goethite and hematite. The effects of the presence of foreign ions depend on the
nature of the ion and the iron oxyhydroxide. At pH <7, a decrease in the binding of
phosphate ions is recorded in the presence of Cd (II) ions in the case of goethite and
hematite. In the presence of Cu (II), Pb (II) and Cd (II), a clear improvement in the
binding is recorded in the case of ferrihydrite at pH> 7. In aquatic environment, the
phosphate uptake by the mining sediments is related to their composition. The
predominance of amorphous iron oxyhydroxides implies better adsorption. However,
that of quartz causes a decrease in the fixing rate.
The spectroscopic analysis (DRIFT) show that in the absence of competitive ions,
phosphates form inner sphere complexes with the symmetry C3v in the case of
ferrihydrite and the symmetry C2v in the case of goethite and hematite. The presence of
chromate and oxalate ions involves a modification of the mechanism of phosphate ions
retention. In the presence of cations, the formation of ternary complexes is shown in the
case of ferrihydrite. In mining sediments, phosphate replaces sulphate in shwertmannite.
Diplôme : Doctorat en sciences En ligne : ../theses/chimie/BOU7050.pdf Format de la ressource électronique : Permalink : https://bu.umc.edu.dz/md/index.php?lvl=notice_display&id=10550 Exemplaires
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Titre : Etude de l'apport des rejets de la ville de Constantine à la charge organique chimique et bactérienne des eaux du Rhumel impact sur l'eau et les sédiments Type de document : texte imprimé Auteurs : Univ. de Constantine, Editeur scientifique Année de publication : 1994 Importance : 73 f. Note générale : 01 Disponible à la salle de recherche
02 Disponibles au magasin de la bibliothèque centraleLangues : Français (fre) Tags : Eau Algérie Constantine Sédiment Rhumel (Algérie) Bactérie Rejet Charge organique Index. décimale : 570 Sciences de la vie. Biologie Permalink : https://bu.umc.edu.dz/md/index.php?lvl=notice_display&id=1444 Etude de l'apport des rejets de la ville de Constantine à la charge organique chimique et bactérienne des eaux du Rhumel impact sur l'eau et les sédiments [texte imprimé] / Univ. de Constantine, Editeur scientifique . - 1994 . - 73 f.
01 Disponible à la salle de recherche
02 Disponibles au magasin de la bibliothèque centrale
Langues : Français (fre)
Tags : Eau Algérie Constantine Sédiment Rhumel (Algérie) Bactérie Rejet Charge organique Index. décimale : 570 Sciences de la vie. Biologie Permalink : https://bu.umc.edu.dz/md/index.php?lvl=notice_display&id=1444 Exemplaires
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Titre : Etude de la charge organique et bactérienne des eaux du barrage de Hammam Grouz et de son affluent principal : le Rhumel analyse de la flore bactérienne hétérotrophe autochtone des eaux et de différentes flores des sediments Type de document : texte imprimé Auteurs : Univ. de Constantine, Editeur scientifique Année de publication : 1994 Importance : 98 f. Note générale : 01 Disponible salle de recherche
02 Disponibles au magasin de la bibliothèque centraleLangues : Français (fre) Tags : Eau Algérie Barrage Sédiment Flore bactérienne Hammam Grouz (Algérie) Rhumel (Algérie) Index. décimale : 570 Sciences de la vie. Biologie Permalink : https://bu.umc.edu.dz/md/index.php?lvl=notice_display&id=1657 Etude de la charge organique et bactérienne des eaux du barrage de Hammam Grouz et de son affluent principal : le Rhumel analyse de la flore bactérienne hétérotrophe autochtone des eaux et de différentes flores des sediments [texte imprimé] / Univ. de Constantine, Editeur scientifique . - 1994 . - 98 f.
01 Disponible salle de recherche
02 Disponibles au magasin de la bibliothèque centrale
Langues : Français (fre)
Tags : Eau Algérie Barrage Sédiment Flore bactérienne Hammam Grouz (Algérie) Rhumel (Algérie) Index. décimale : 570 Sciences de la vie. Biologie Permalink : https://bu.umc.edu.dz/md/index.php?lvl=notice_display&id=1657 Exemplaires
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