Pollution by the heavy metals of the superficial marine sediment of Skikda city (Northeastern Algeria)

摘要

The mineral micropolluants not accumulating in water (receiving) herself is transferred enough quickly in the sediments where they are metabolized in part by the living organisms and is put in circulation in the food chains where their toxicity blooms. The irreversibility of this pollution is especially preoccupying because it is practically impossible to recover these metals comfortably, once inattentive in the nature; their remanence is with difficulty the very reason of an accumulation controllable. The assessment of the content of the superficial sediment of the inshore zone of the region of Skikda in nine (09) heavy metals allowed us to put in evidence of the concentrations raised of pollutants, passing the values limits fixed by the regulation in force as well as (Algerian) the Dutch norms that have been taken like reference and this for some sewages. Virgin zones deprived of all pollution have also been put in evidence.