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Partager le résultat de cette recherche Interroger des sources externesÉvaluation du risque de contamination des sédiments de l'oued Boumerzoug par les éléments traces métalliques sur la faune macroinvertébrée benthique et via la pertinence des bioindicateurs Spinacia oleracea (L.) et Physa acuta (D.) / Dounia Keddari
Titre : Évaluation du risque de contamination des sédiments de l'oued Boumerzoug par les éléments traces métalliques sur la faune macroinvertébrée benthique et via la pertinence des bioindicateurs Spinacia oleracea (L.) et Physa acuta (D.) Type de document : texte imprimé Auteurs : Dounia Keddari, Auteur ; Fatima Zohra Afri-Mehennaoui, Directeur de thèse ; Leila Sahli, Directeur de thèse Mention d'édition : 08/03/2020 Editeur : جامعة الإخوة منتوري قسنطينة Année de publication : 2020 Importance : 283 f. Format : 30 cm. Note générale : Doctorat 3éme CYCLE LMD.
1 copies imprimées disponibles
Langues : Français (fre) Catégories : Français - Anglais
BiologieTags : Biologie et Ecologie Végétale: Ecologie et Environnement Éléments Traces Métalliques Sédiment Contamination Biomonitoring Spinacia oleracea Physa acuta Faune macroinvertebrée benthique Oued Boumerzoug Trace metals Sediment التلوث الرواسب المعادن الثقيلة وادي بو مرزوق Index. décimale : 570 Sciences de la vie. Biologie Résumé : Our study is part of the deepening of our knowledge of a lotic ecosystem, the Boumerzeug wadi and its tributaries, which has been the subject of various complementary approaches to characterize its physico-chemical and biological quality The objective of this work is to assess the level of contamination of contamination of the abiotic and biotic compartments of the ecosystem by trace metals (TM) whose anthropogenic origin is added to the natural background levels. The samples were collected from 20 sites on five occasions spread over 15 months. Among the elements determined, some are essential to the physiological functions of organisms such as Cu, Cr, Ni, Ni, Zn, others are toxic such as Cd and Pb and finally Mn is a natural element without consequences on living beings. The TM measured in surface sediments follow the following sequence: MnZn > > Cu > Pb Ni>Co> Cd. The study of benthic macroinvertebrate fauna compartments highlights a faunal impoverishment following the disappearance of species sensitive to organic and/or metallic pollution, the method does not allow the nature of stress to be identified. The hydrobiological quality of the watercourse, expressed by the biotic index, reflects a situation of significant disturbance illustrated by the drop in values from upstream to downstream. The transfers of TM to the different parts, roots, leaves of Spinacia oleracea revealed that the chenopodiaceae concentrates and sequesters in its roots all TM except zinc, which has a higher content in the leaves. Thus, the roots seem to constitute a barrier that reduces the transfer of metal elements to the aerial part, while zinc, an essential metal, is translocated to the leaves. The hierarchy of average TM contents in spinach is as follows: Zn > Mn > Cu > Pb > Cr > Ni> Co>Cd. The transfer of TM to Physa or Physelle acuta lung gastropods in the various specimens, soft tissues and shells of P. acuta adults/juveniles) reflects the bioavailability of the element. The spatio-temporal data of TM contents in Physa acuta record the following order of abundance: MnZn > Cr> Cu > Ni>Pb > Co > Cd. All detected heavy metal concentrations were higher in soft tissue than in shell for adults and juveniles. There was a significant effect of the age (p < 0,001) on the concentrations of the eight metals, the adults of P. acut showing higher concentrations than juvenile. The biota-sediment accumulation factor (BSAF) of Cd in soft tissue was higher than 1, hence the usage of this species as a bio indicator for Cd pollution The present study provides data and information on the concentrations of 8 TM (Cd, Co, Cr, Cu, Mn, Ni, Pb, Zn) in the sediments of the Boumerzoug wadi and its tributaries and their transfer to plant and animal. It will provide a database and knowledge base that could provide new information for any future biomonitoring study of freshwater aquatic ecosystems.
Note de contenu : Annexes. Diplôme : Doctorat En ligne : ../theses/biologie/KED7637.pdf Format de la ressource électronique : Permalink : index.php?lvl=notice_display&id=11471 Évaluation du risque de contamination des sédiments de l'oued Boumerzoug par les éléments traces métalliques sur la faune macroinvertébrée benthique et via la pertinence des bioindicateurs Spinacia oleracea (L.) et Physa acuta (D.) [texte imprimé] / Dounia Keddari, Auteur ; Fatima Zohra Afri-Mehennaoui, Directeur de thèse ; Leila Sahli, Directeur de thèse . - 08/03/2020 . - جامعة الإخوة منتوري قسنطينة, 2020 . - 283 f. ; 30 cm.
Doctorat 3éme CYCLE LMD.
1 copies imprimées disponibles
Langues : Français (fre)
Catégories : Français - Anglais
BiologieTags : Biologie et Ecologie Végétale: Ecologie et Environnement Éléments Traces Métalliques Sédiment Contamination Biomonitoring Spinacia oleracea Physa acuta Faune macroinvertebrée benthique Oued Boumerzoug Trace metals Sediment التلوث الرواسب المعادن الثقيلة وادي بو مرزوق Index. décimale : 570 Sciences de la vie. Biologie Résumé : Our study is part of the deepening of our knowledge of a lotic ecosystem, the Boumerzeug wadi and its tributaries, which has been the subject of various complementary approaches to characterize its physico-chemical and biological quality The objective of this work is to assess the level of contamination of contamination of the abiotic and biotic compartments of the ecosystem by trace metals (TM) whose anthropogenic origin is added to the natural background levels. The samples were collected from 20 sites on five occasions spread over 15 months. Among the elements determined, some are essential to the physiological functions of organisms such as Cu, Cr, Ni, Ni, Zn, others are toxic such as Cd and Pb and finally Mn is a natural element without consequences on living beings. The TM measured in surface sediments follow the following sequence: MnZn > > Cu > Pb Ni>Co> Cd. The study of benthic macroinvertebrate fauna compartments highlights a faunal impoverishment following the disappearance of species sensitive to organic and/or metallic pollution, the method does not allow the nature of stress to be identified. The hydrobiological quality of the watercourse, expressed by the biotic index, reflects a situation of significant disturbance illustrated by the drop in values from upstream to downstream. The transfers of TM to the different parts, roots, leaves of Spinacia oleracea revealed that the chenopodiaceae concentrates and sequesters in its roots all TM except zinc, which has a higher content in the leaves. Thus, the roots seem to constitute a barrier that reduces the transfer of metal elements to the aerial part, while zinc, an essential metal, is translocated to the leaves. The hierarchy of average TM contents in spinach is as follows: Zn > Mn > Cu > Pb > Cr > Ni> Co>Cd. The transfer of TM to Physa or Physelle acuta lung gastropods in the various specimens, soft tissues and shells of P. acuta adults/juveniles) reflects the bioavailability of the element. The spatio-temporal data of TM contents in Physa acuta record the following order of abundance: MnZn > Cr> Cu > Ni>Pb > Co > Cd. All detected heavy metal concentrations were higher in soft tissue than in shell for adults and juveniles. There was a significant effect of the age (p < 0,001) on the concentrations of the eight metals, the adults of P. acut showing higher concentrations than juvenile. The biota-sediment accumulation factor (BSAF) of Cd in soft tissue was higher than 1, hence the usage of this species as a bio indicator for Cd pollution The present study provides data and information on the concentrations of 8 TM (Cd, Co, Cr, Cu, Mn, Ni, Pb, Zn) in the sediments of the Boumerzoug wadi and its tributaries and their transfer to plant and animal. It will provide a database and knowledge base that could provide new information for any future biomonitoring study of freshwater aquatic ecosystems.
Note de contenu : Annexes. Diplôme : Doctorat En ligne : ../theses/biologie/KED7637.pdf Format de la ressource électronique : Permalink : index.php?lvl=notice_display&id=11471 Exemplaires (1)
Code-barres Cote Support Localisation Section Disponibilité KED/7637 KED/7637 Thèse Bibliothèque principale Thèses Disponible
Titre : Qualité écologique, niveau de contamination métallique du barrage Koudiet Medouar (Timgad) et transfert des ETM vers les produits de la pêche. Type de document : texte imprimé Auteurs : Imane Hamza ép Smattti, Auteur ; Fatima Zohra Afri-Mehennaoui, Directeur de thèse Mention d'édition : 17/12/2020 Editeur : جامعة الإخوة منتوري قسنطينة Année de publication : 2020 Importance : 288 f. Format : 30 cm. Note générale : 1 copies imprimées disponibles
Langues : Français (fre) Catégories : Français - Anglais
BiologieTags : Biologie et Ecologie Végétale:Ecologie et Environnement Ecologie et Environnement : Ecotoxicologie sédiment éléments traces métalliques macroinvertébrés poissons barrage de Koudiet Medouar Oued Rebaa sediment trace metals macroinvertebrates fish Koudiet Medouar dam wadi Rebaa الرواسب المعادن
الثقيلة اللافقاريات الأسماك سد كودييت المدور واد رباعIndex. décimale : 570 Sciences de la vie. Biologie Résumé :
Trace metals (TM) are ubiquitous contaminants of the aquatic environments, resulting directly or indirectly from the chemical alteration and mechanical erosion of source rocks, to which are added another origins anthropogenic such as: agricultural, industrial and domestic. TM can accumulate in the sedimentary compartment in dissolved or especially in particulate form, a veritable well for pollutants, they contaminate the plant and animal organisms living in the environment. The lack of data on the ecological health of the Koudiet Medouar dam has motivated our interest in its investigation. The aim of this study is to assess the level of recent contamination by trace metal elements of the surface sediments of the KM dam and its main tributary Oued Rebaa, and their transfer to fishery products, as well as the hydrobiological quality of this ecosystem. This study is carried out on 9 stations, 6 of which are selected from upstream to downstream of Oued Rebaa and 3 at the KM dam. Eight sampling campaigns covering in situ physical measurements of water, sediment sampling, macroinvertebrate and fish were carried out over 2 years from September 2012 to July 2014. The analytical approach concerned the physicochemical characterization of sediments (water content, organic matter, pHs, electrical conductivity and total limestone, determined on the fraction less than 2 mm) and their contents of 8 TMEs (Cd, Co, Cr, Cu, Mn, Ni, Pb and Zn on the fraction less than 63μm) determined by Flame Atomic Absorption Spectrophotometry. The transfer of TM was determined in the gills, liver and muscles of 4 fish species, Hypophthalmichthys molitrix, Cyprinus carpio, Barbus sitifensis and Alburnus alburnus. The biological approach focused on the biodiversity of the benthic macroinvertebrate and the calculation of the biotic index (BI) reflecting the ecological quality of the environment. The sediments of the KM dam and wadi Rebaa, which are slightly alkaline, are characterized by high electrical conductivity, medium organic matter and high carbonate load. The pseudo-total concentrations of TM in the sediments show the following order of abundance: Mn > Zn > Cr > Cu > Co > Pb > Ni > Cd. The spatial and temporal distribution of TMs shows natural background levels of Co, Pb, Ni and Mn. Contamination by Cd, Cr, Cu and Zn is highlighted and affects all stations. The geoaccumulation index (Igeo), contamination factor (CF), pollution load index (PLI), sediment pollution index (SPI) and degree of contamination (Dc) reveal polymetallic contamination dominated by two or more elements at stations where fish swim through the dam; Cd, Cr, Cu and Zn being of greatest concern. The same results are confirmed by the ecological risk factor (Re), the ecological risk index (IR) and the toxicity criteria (TEC: Threshold Effect Concentration and PEC: Probable Effect Concentration) which show that Cd, Cr, Cu and Zn are the elements concerned by frequent and/or occasional effects on benthic fauna. The hydrobiological quality of wadi Rebaa and the KM dam, expressed by the Biotic Index, reflects a remarkable disturbance situation, illustrated by an impoverishment of the faunal biodiversity and the reduction of the IB from 10/10 to 2/10 from upstream to downstream. The quality of the fishery products is assessed through the level of contamination of the fish fauna of the Koudiet Medouar dam. The hierarchy of mean TM levels in Hypophthalmichthys molitrix, Cyprinus carpio, and Alburnus alburnus follow the following sequence: Zn˃ Mn˃ Cr˃ Cu˃ Pb˃ Co˃ Ni˃ Cd. While Barbus sitifensis, the order of abundance is as follows: Zn˃ Mn˃ Cr˃ Cu˃ Co˃ Pb˃ Ni˃ Cd. Levels determined in the gills of C. caprio and H. molitrix exceed critical values for Zn contamination, whereas the liver of C. caprio and B. setifensis accumulates Cd. The critical values for Cd in the muscle of A. alburnus and the risk it poses to human health make it unfit for consumption. The level of accumulation of Cd increases with the age and size of the fish.
Note de contenu :
Annexes.Diplôme : Doctorat en sciences En ligne : ../theses/biologie/HAM7699.pdf Format de la ressource électronique : Permalink : index.php?lvl=notice_display&id=11533 Qualité écologique, niveau de contamination métallique du barrage Koudiet Medouar (Timgad) et transfert des ETM vers les produits de la pêche. [texte imprimé] / Imane Hamza ép Smattti, Auteur ; Fatima Zohra Afri-Mehennaoui, Directeur de thèse . - 17/12/2020 . - جامعة الإخوة منتوري قسنطينة, 2020 . - 288 f. ; 30 cm.
1 copies imprimées disponibles
Langues : Français (fre)
Catégories : Français - Anglais
BiologieTags : Biologie et Ecologie Végétale:Ecologie et Environnement Ecologie et Environnement : Ecotoxicologie sédiment éléments traces métalliques macroinvertébrés poissons barrage de Koudiet Medouar Oued Rebaa sediment trace metals macroinvertebrates fish Koudiet Medouar dam wadi Rebaa الرواسب المعادن
الثقيلة اللافقاريات الأسماك سد كودييت المدور واد رباعIndex. décimale : 570 Sciences de la vie. Biologie Résumé :
Trace metals (TM) are ubiquitous contaminants of the aquatic environments, resulting directly or indirectly from the chemical alteration and mechanical erosion of source rocks, to which are added another origins anthropogenic such as: agricultural, industrial and domestic. TM can accumulate in the sedimentary compartment in dissolved or especially in particulate form, a veritable well for pollutants, they contaminate the plant and animal organisms living in the environment. The lack of data on the ecological health of the Koudiet Medouar dam has motivated our interest in its investigation. The aim of this study is to assess the level of recent contamination by trace metal elements of the surface sediments of the KM dam and its main tributary Oued Rebaa, and their transfer to fishery products, as well as the hydrobiological quality of this ecosystem. This study is carried out on 9 stations, 6 of which are selected from upstream to downstream of Oued Rebaa and 3 at the KM dam. Eight sampling campaigns covering in situ physical measurements of water, sediment sampling, macroinvertebrate and fish were carried out over 2 years from September 2012 to July 2014. The analytical approach concerned the physicochemical characterization of sediments (water content, organic matter, pHs, electrical conductivity and total limestone, determined on the fraction less than 2 mm) and their contents of 8 TMEs (Cd, Co, Cr, Cu, Mn, Ni, Pb and Zn on the fraction less than 63μm) determined by Flame Atomic Absorption Spectrophotometry. The transfer of TM was determined in the gills, liver and muscles of 4 fish species, Hypophthalmichthys molitrix, Cyprinus carpio, Barbus sitifensis and Alburnus alburnus. The biological approach focused on the biodiversity of the benthic macroinvertebrate and the calculation of the biotic index (BI) reflecting the ecological quality of the environment. The sediments of the KM dam and wadi Rebaa, which are slightly alkaline, are characterized by high electrical conductivity, medium organic matter and high carbonate load. The pseudo-total concentrations of TM in the sediments show the following order of abundance: Mn > Zn > Cr > Cu > Co > Pb > Ni > Cd. The spatial and temporal distribution of TMs shows natural background levels of Co, Pb, Ni and Mn. Contamination by Cd, Cr, Cu and Zn is highlighted and affects all stations. The geoaccumulation index (Igeo), contamination factor (CF), pollution load index (PLI), sediment pollution index (SPI) and degree of contamination (Dc) reveal polymetallic contamination dominated by two or more elements at stations where fish swim through the dam; Cd, Cr, Cu and Zn being of greatest concern. The same results are confirmed by the ecological risk factor (Re), the ecological risk index (IR) and the toxicity criteria (TEC: Threshold Effect Concentration and PEC: Probable Effect Concentration) which show that Cd, Cr, Cu and Zn are the elements concerned by frequent and/or occasional effects on benthic fauna. The hydrobiological quality of wadi Rebaa and the KM dam, expressed by the Biotic Index, reflects a remarkable disturbance situation, illustrated by an impoverishment of the faunal biodiversity and the reduction of the IB from 10/10 to 2/10 from upstream to downstream. The quality of the fishery products is assessed through the level of contamination of the fish fauna of the Koudiet Medouar dam. The hierarchy of mean TM levels in Hypophthalmichthys molitrix, Cyprinus carpio, and Alburnus alburnus follow the following sequence: Zn˃ Mn˃ Cr˃ Cu˃ Pb˃ Co˃ Ni˃ Cd. While Barbus sitifensis, the order of abundance is as follows: Zn˃ Mn˃ Cr˃ Cu˃ Co˃ Pb˃ Ni˃ Cd. Levels determined in the gills of C. caprio and H. molitrix exceed critical values for Zn contamination, whereas the liver of C. caprio and B. setifensis accumulates Cd. The critical values for Cd in the muscle of A. alburnus and the risk it poses to human health make it unfit for consumption. The level of accumulation of Cd increases with the age and size of the fish.
Note de contenu :
Annexes.Diplôme : Doctorat en sciences En ligne : ../theses/biologie/HAM7699.pdf Format de la ressource électronique : Permalink : index.php?lvl=notice_display&id=11533 Exemplaires (1)
Code-barres Cote Support Localisation Section Disponibilité HAM/7699 HAM/7699 Thèse Bibliothèque principale Thèses Disponible
Titre : Evaluation de la pollution des eaux issue de la zone industrielle de Skikda Type de document : texte imprimé Auteurs : Rim Mohamed Ben Ali, Auteur ; Chaabane Rahmoune, Directeur de thèse Editeur : constantine [Algérie] : Université Constantine 1 Année de publication : 2014 Importance : 127 f. Format : 30 cm. Note générale : 2 copies imprimées disponibles
Langues : Français (fre) Catégories : Français - Anglais
BiologieTags : effluents liquides Skikda installations industrielles ETM analyse statistique liquid effluents industrial installations trace metals statistical analysis النفایات السائلة سكیكدة المنشآت الصناعیة المعدني الدراسة الإحصائیة. Index. décimale : 570 Sciences de la vie. Biologie Résumé : This work focused on environmental studies related to the liquid effluents discharges from industrial installations. It consists to analyze and model these releases to assess the degree of pollution and predict their impacts on receiving environment.
In this work we are particularly interested in analyzing waters from releases generated by industrial installations located in the industrial zone of SKIKDA, during the period from 19/12/2012 to 25/06/2013, this research involved seven sampling points, collected seventeen times during the study period, we have performed for the seven stations a set of analytical approaches, physicochemical parameters, organic pollution parameters and dosage of tow trace metals (Fe, CrVI), whether changes of fourteen physicochemical characteristics.
Firstly, all physicochemical approaches have revealed that the quality of waste water from different study sites of dubious nature and out class, it presents a chemical pollution for all stations except (RAF/K) and (RTE), which in turn have an organic pollution, that could generate a toxicity to the wildlife, aquatic and marine flora. In the analysis of ETM, marked mainly by the very high levels of Fe which are higher than standards and changes in CrVI limited for all stations while it marks an exceeding in (RAF/K).
On the other hand, the statistical approach, (univariate statistical analyzes, bivariate and multivariate) allowed a spatiotemporal assessment and waste water quality modeling at each station, showing a quality degradation of these waters.
Diplôme : Magistère En ligne : ../theses/biologie/MOH6653.pdf Format de la ressource électronique : Permalink : index.php?lvl=notice_display&id=9960 Evaluation de la pollution des eaux issue de la zone industrielle de Skikda [texte imprimé] / Rim Mohamed Ben Ali, Auteur ; Chaabane Rahmoune, Directeur de thèse . - constantine [Algérie] : Université Constantine 1, 2014 . - 127 f. ; 30 cm.
2 copies imprimées disponibles
Langues : Français (fre)
Catégories : Français - Anglais
BiologieTags : effluents liquides Skikda installations industrielles ETM analyse statistique liquid effluents industrial installations trace metals statistical analysis النفایات السائلة سكیكدة المنشآت الصناعیة المعدني الدراسة الإحصائیة. Index. décimale : 570 Sciences de la vie. Biologie Résumé : This work focused on environmental studies related to the liquid effluents discharges from industrial installations. It consists to analyze and model these releases to assess the degree of pollution and predict their impacts on receiving environment.
In this work we are particularly interested in analyzing waters from releases generated by industrial installations located in the industrial zone of SKIKDA, during the period from 19/12/2012 to 25/06/2013, this research involved seven sampling points, collected seventeen times during the study period, we have performed for the seven stations a set of analytical approaches, physicochemical parameters, organic pollution parameters and dosage of tow trace metals (Fe, CrVI), whether changes of fourteen physicochemical characteristics.
Firstly, all physicochemical approaches have revealed that the quality of waste water from different study sites of dubious nature and out class, it presents a chemical pollution for all stations except (RAF/K) and (RTE), which in turn have an organic pollution, that could generate a toxicity to the wildlife, aquatic and marine flora. In the analysis of ETM, marked mainly by the very high levels of Fe which are higher than standards and changes in CrVI limited for all stations while it marks an exceeding in (RAF/K).
On the other hand, the statistical approach, (univariate statistical analyzes, bivariate and multivariate) allowed a spatiotemporal assessment and waste water quality modeling at each station, showing a quality degradation of these waters.
Diplôme : Magistère En ligne : ../theses/biologie/MOH6653.pdf Format de la ressource électronique : Permalink : index.php?lvl=notice_display&id=9960 Exemplaires (1)
Code-barres Cote Support Localisation Section Disponibilité MOH/6653 MOH/6653 Thèse Bibliothèque principale Thèses Disponible
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 ; Fatima 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) Catégories : Français - Anglais
BiologieTags : 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 : 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 ; Fatima Zohra Afri-Mehennaoui, Directeur de thèse . - Constantine : Université Mentouri Constantine, 2012 . - 176 f. ; 31 cm.
2 copies imprimées disponibles
Langues : Français (fre)
Catégories : Français - Anglais
BiologieTags : 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 : index.php?lvl=notice_display&id=6174 Exemplaires (1)
Code-barres Cote Support Localisation Section Disponibilité MEL/6203 MEL/6203 Thèse Bibliothèque principale Thèses Disponible
