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Sadia REMILI, Ahmed KERFOUF. 2013. Evaluation de la qualité physico-chimique et du niveau de contamination métallique (Cd, Pb, Zn) des rejets d’eaux usées d’Oran et de Mostaganem (littoral ouest algérien)

Physio-Géo 01/2013; (ISSN : 1958-573X) :61 -67. http://physio-geo.revues.org (labellisée AERES, hébergée par Revues.org/Cléo)(Volume 7). DOI: 10.4000/physio-geo.3258

ABSTRACT The coastal areas are the locus of activities requiring water of good physicochemical quality: recreational uses, aquaculture and fishing. These areas are under the direct influence of wadis and wastewaters which pass by the contributions of watersheds, urban and industrial discharge. These discharges result, when the renewal of water masses is small compared to release, significant degradation of water quality and marine ecosystem.This study focuses on an assessment of water quality of urban and industrial effluents from two coastal urban centers western (Oran and Mostaganem), with the aim of assessing the state of contamination by heavy metals (Cd, Pb and Zn), as well as the evaluation of the physico-chemical quality of marine waters to determine the potential impact of metal pollution on the west coast of Algeria.The average concentration of cadmium is maximal for the industrial effluent of Mostaganem (0.88 mg.l-1 - standard deviation: 1.35 mg.l-1). For zinc, the highest average concentration corresponds to the urban effluent of Mostaganem (0.92 mg.l-1 - standard deviation: 1.35 mg.l-1). Lead has average concentrations high enough at the three studied effluents: 0.23 mg.l-1 at the urban effluent of Oran (standard deviation: 0.22 mg.l-1), 0.22 mg.l-1 at the industrial effluent of Mostaganem (standard deviation: 0.21 mg.l-1) and 0.19 mg.l-1 at the urban effluent of Mostaganem (standard deviation: 0.20 mg.l-1). If heavy metal concentrations vary greatly from one sample to another, as reflected in the standard deviations, no lasting change is apparent. Only average levels of cadmium are exceeding the normative.

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    ABSTRACT: The coastal areas are the locus of activities requiring water of good physicochemical quality: recreational uses, aquaculture and fishing. Thesis areas are under the direct influences of wadis and wastewaters, which pass by the contributions of watersheds, urban and industrial discharge. Thesis discharges result, when the renewal of water masses is small compared to release, significant deterioration of water quality and marinades ecosystem. This study focuses one year assessment of water quality urban sewages from coastal urban centers western (Oran), with the aim of assessing the state of contamination by draws metals (Cd, Pb Zn and), have well ace the assessment of the physico-chemical quality of marinades waters to determines the potential impact of metal pollution one the west coast Algeria of. Lead has average concentrations high enough at the three studied sewages: 0.23 mg.l-1 at the urban sewage Oran of (standard deviation: 0.22 mg.l-1). Yew heavy metal concentrations vary greatly from one sample to another; have reflected in the standard deviations, no lasting changes obvious is. Only average levels of cadmium exceeding the normative.
    International Journal of Sciences: Basic and Applied Research (IJSBAR - ISSN 2307-4531), (2014), Volume 16, No 2, pp 124-130 . 01/2014; 16:124-130.

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