Browsing by Author "Sayoud, S."

Filter results by typing the first few letters
Now showing 1 - 2 of 2
  • No Thumbnail Available
    Item
    Evaluation of the quality of the ground of the lake of Reghaïa in heavy metals and study of their distribution on the surface
    (Aljest, 2018) Delleci, K.; Mohamed, N.; Madjdoub, F.; Sayoud, S.; Louhab, K.
    The Lake of Reghaïa is an exceptional natural heritage in the Algiers area, it underwent a dramatic pollution by its rejection supply due to the close industrial activities. Since the year 1999. That, encouraged us to accordingly take part in order to present an evaluation of the quality of the grounds of the site as regards pollution in MTE (metallic trac elements) heavy metals. We have selected a ground located on western bank of the lake, of a square surface, limited to 2,500 m2 of a slope of 25%, it is agricultural but not exploited for more than 20 years according to the owner of the ground. That has an advantage of excluding the irrigation by water from the lake. A systematic sampling of triangular grid of thirteen (13) samples with positions GSP (geographical system of positioning) of each point. Quantities of approximately 100g more 1 kg of ground were taken. Analysis by AAS (atomic absorption spectrometry) has shown presence of heavy metals (Ni, Zn, Pb, Cd, Cr, Cu and Hg), which does not exceed the values of reference on selected surface, of the contents of (Ni and Zn and Hg) exceed slightly the values reference in the superior part of surface located at 64 m of bank of lake, and approximately 20 m in height compared to the surface of the lake, the pollution of the surface of ground were not noted, however, from the contents of (Cr) go beyond the values of reference in all surface marking higher spades in the medium of surface, On the other hand, accumulation Cu is on the level nearest to the lake. Strong Mn concentrations on all the surface particularly they are high on first line close to lake and the limit superior of analyzed surface.
  • No Thumbnail Available
    Item
    State and evolution of the microbiological pollution of the lake of reghaïa
    (Université M'Hamed Bougara Boumerdes, 2018) Delleci, K.; Sayoud, S.; Louhab, K.
    The lake of reghaïa is a fresh water tank, which represents a very vulnerable link for maintenance of the balance in the ecosystem, but currently it receives a very important volume of liquid-effluents generated by the industrial activities which disturbs the balance of the aquatic life opposite fauna and the flora, the micro-organisms represent a biological form of pollution conveyed by the industrial effluents ( sewage), the objective of our study is the identification, the quantitative estimate and the follow-up of the seasonal dynamics of the various communities of the micro-organisms which develop in this tank, for this purpose 3 series of taking away were carried out between the month of December 2015 and July 2016, in order to follow the development and the proliferation of certain micro-organisms of the coliforms type fecal and streptococcus fecal which are, Escherichia coli (colon bacillus) (enterobactery) and the streptococcus ones of group D (enterococcus), where the enumeration was carried out by the method NP and the presence of the salmonella and vibrio-choleric. The results gave very high concentrations which exceeds 15*104 for the coli bacilli and between 0-6 for the enterococcus ones, with absence of salmonella and choleric vibrio, which allows us to classify our water category 4 (water of bad quality), and the dynamics of the bacteria follows a seasonal cycle which varies according to the flow and the nature of the effluents rejected towards the lake (physico-chemical characteristics) of water