Évaluation du niveau de contamination par les éléments traces métalliques (cadmium, cuivre, nickel et zinc) des sédiments de l’oued Boumerzoug et ses affluents, et leur transfert vers la chénopodiacée spinacia oleracea (L.)

Keddari, Dounia; Afri-Mehennaoui, Fatima-Zohra; Smatti-Hamza, Imane; Djeddi, H.; Sahli, Leila; Mehennaoui, Smaïl

doi:10.7202/1067308ar

Cited by 10 publications

(7 citation statements)

References 53 publications

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“…The EC high values of the alluvium in the Boumerzoug wadi are due to the enrichment with monovalent and bivalent ions (Nassali et al, 2002). EC is fairly consistent with the conductivity of freshwater sediments despite a few peaks exceeding 1070 μS/cm and 1083 μS/cm (Keddari et al, 2019). These values reflect a sometimes-high mineralization that can be attributed to the presence of sebkhas upstream of the sub-basin in the Ain M'lila region.…”

Section: Discussionsupporting

confidence: 63%

“…The pH values recorded in the alluvial deposits of Boumerzoug wadi underline their alkaline characters, sometimes tending towards neutrality. Alkalinity reflects the nature of the sediments, dominated by a limestone source rock and silty-clay soils (Nassali et al, 2002;Keddari et al, 2019). The EC high values of the alluvium in the Boumerzoug wadi are due to the enrichment with monovalent and bivalent ions (Nassali et al, 2002).…”

Section: Discussionmentioning

confidence: 99%

“…The main wadis of the Constantine basin are part of a geographical context that clearly presents contrasting aspects from upstream to downstream: the flat and bare reliefs and rather loose river system of the high plains are followed by the low Tellian Atlas hills and deep valleys, which are extending to the north by mountainous massifs affected by a high drainage density (Keddari et al, 2019;Mébarki, 1984). This work is essentially based on a two-steps method, careful field observations, and granulometric and geochemical analysis of sediments in laboratory.…”

Section: Introductionmentioning

confidence: 99%

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The Vertical Distribution of the Alluvial Chemo-Facies of Boumerzoug Wadi, Constantine, Northeastern Algeria: Paleoenveromental Significance and Climate Evolution

RABAHI¹,

DJAIZ²,

Defaflia³

et al. 2021

AUOG

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The authorities of Constantine city have been working on the redevelopment and calibration of the Rhumel and Boumerzoug wadis since 2015. The latter calebrage works caused great damage to the banks, thus affecting the Quaternary geological formations in place (alluvial terraces, flood plains). A multidisciplinary research project based on a geomorphological and sedimentological approach was quickly set up to create a scientific data base before their total destruction and loss of physical traces all along the wadis. The present study focuses on the sedimentological and geochemical analysis of the alluvial deposits of Boumerzoug wadi in order to describe the sediments, to reconstitute their nature, and to interpret both the climatic evolution and the paleo-environments of the region. Sedimentological and geochemical results confirm the succession of deposition cycles linked to progressive climate change.

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Section: Discussionsupporting

confidence: 63%

Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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The Vertical Distribution of the Alluvial Chemo-Facies of Boumerzoug Wadi, Constantine, Northeastern Algeria: Paleoenveromental Significance and Climate Evolution

RABAHI¹,

DJAIZ²,

Defaflia³

et al. 2021

AUOG

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“…The levels in force in 2022 are shown in Table 1. The purpose of these reference levels (N1/N2 for marine and estuarine sediments) is to set markers to anticipate the environmental impact of a planned sediment material handling operation, particularly dredging (Keddari et al 2019).…”

Section: French Regulatory Framework For the Management Of Dredged Se...mentioning

confidence: 99%

Management of dredged marine sediments in southern France: main keys to large-scale beneficial re-use

DORLEON,

Rigaud,

Techer

2023

Preprint

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Each year fifty million cubic meters of marine sediments are dredged in France to maintain and develop harbor activities and sustain the economy of littoral territories. Because of anthropogenic activities in and around harbours, bottom sediments can contain more or less significant amounts of chemical and organic pollutants whose behavior during dredging must be addressed in order to avoid releasing and risks for human and environment. French regulations come to govern the management of dredged marine sediments, considering them ‘safe’ and possibly to be dumped at sea or ‘contaminated’ and needed to be treated on land as waste. These last years, new constraints are pushing towards a management on land. This management is however challenging as few channels are proposed to promote or reuse marine sediments, and elimination appears to be economically and environmentally unsustainable. This study provides an overview of the technical and regulatory aspects related to dredged marine sediment management in France and aims to identify and discuss the limits or barriers of their valorization. Dredged sediments are mainly composed of particles with heterogeneous grain size, some being known for many applications such as building materials and growing media. However, several reasons have been put forward to explain why these particles are not reused when extracted from dredged sediments. Several technical, socio-economic and regulatory obstacles explain the low demand for dredged sediments. This demand can be stimulated by government incentives and a good regulatory framework. National regulations could help streamline the reuse of dredged sediments by standardizing sediment composition tests, removing the "waste" status attributed to dredged sediments and creating a regulated market for dredged sediment-based products, thus creating a promising economic sector.

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“…Heavy metals are known to be non-biodegradable and persistent for long periods of time in both aquatic and terrestrial environments [15] [16] [17] [18]. Heavy metals present in an aquatic environment accumulate in the sediments and only a small proportion remains in the water [19]. From an ecological point of view, toxicity is evaluated according to the mobility of heavy metals and depends on several parameters such as the dynamic conditions that fix the metal, the type of chemical bonding and the properties of the metal [20].…”

Section: Introductionmentioning

confidence: 99%

Contamination and Potential Risks of Heavy Metals in the Sediments of the Chari and Logon Rivers in N’Djamena, Chad

Digué¹,

Tinda²,

Bertrand³

et al. 2023

OJSS

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The pollution of sediments by inorganic pollutants requires particularly important attention because of their toxicity, their persistence in the environment and their bioaccumulation by animal and plant life. The pollution of sediments by inorganic pollutants requires particularly important attention because of their toxicity, their persistence in the environment and their bioaccumulation by animal and plant living beings. This study focuses on the pollution of sediments of the Chari and Logon rivers in the city of N'Djamena by heavy metals. The objective of this study is to evaluate the degree of contamination, the geo-accumulation index and the degree of the Pollutant Loading Index of some heavy metals (Pb, Cr, Cu, Mn and Cd) and iron in the sediments of the sampled sites. The average concentrations of heavy metals and iron in the sediments are: Pb (10.00 ± 00 µg/Kg to 126 ± 16.52 µg/Kg); Cr VI (0.13 ± 00 mg/Kg to 0.21 ± 00 mg/Kg); Cd (trace); Cu (0.08 ± 0.02 mg/kg to 3.23 ± 0.64 mg/kg); Fe (0.25 ± 0.00 mg/kg to 5.79 ± 0.00 mg/kg); and Mn (0.2 ± 0.00 mg/Kg to 1.1 ± 0.00 mg/Kg); in order of highest to lowest abundance: Fe > Mn > Cd > Cu > Cr VI > Pb for the Logon; Fe > Cu > Mn > Cd > Cr VI > Pb for the Chari and Fe > Mn > Cu > Cd > Cr VI > Pb for the Confluent. The contamination factors for all heavy metals range from no contamination to low contamination for the sediments analyzed. The geo-accumulation indices indicate that the sampled sites are not polluted. The same is true for Er and RI which confirm an absence of ecological risks in the analyzed sediments.

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Évaluation du niveau de contamination par les éléments traces métalliques (cadmium, cuivre, nickel et zinc) des sédiments de l’oued Boumerzoug et ses affluents, et leur transfert vers la chénopodiacée spinacia oleracea (L.)

Cited by 10 publications

References 53 publications

The Vertical Distribution of the Alluvial Chemo-Facies of Boumerzoug Wadi, Constantine, Northeastern Algeria: Paleoenveromental Significance and Climate Evolution

The Vertical Distribution of the Alluvial Chemo-Facies of Boumerzoug Wadi, Constantine, Northeastern Algeria: Paleoenveromental Significance and Climate Evolution

Management of dredged marine sediments in southern France: main keys to large-scale beneficial re-use

Contamination and Potential Risks of Heavy Metals in the Sediments of the Chari and Logon Rivers in N’Djamena, Chad

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