چکیده :

The contamination of surface sediments in AL Hawizah wetland by metals and polycyclic aromatic hydrocarbons (PAHs) has been fully investigated. For determination of polycyclic aromatic hydrocarbons and metals concentration in sediments 8 sampling stations were selected in study area. The results showed that the concentration of Mn is the highest while the content of Cr is the lower in the both season. The concentration of Cr and V is lower than mean crust content while Cu concentration is more than mean crust content. The results obtained from Muller’s geochemical index are indicative of range from uncontaminated to moderately contaminated. Based on potential ecological risk (RI), the AL Hawizah wetland had low ecological risk. The total polycyclic aromatic hydrocarbons concentrations ranged from 1071 to 15540 ng/g dry weight, with a mean of 9417.50 ng/g in the summer while total amounts of PAHs in the winter ranged from 1542 to 17283 with a mean 10321.25 ng/g dry weight. The area of study was affected by pyrogenic and petrogenic sources (51.74% and 48.26%, respectively), in the winter. The concentrations of the 16 polycyclic aromatic hydrocarbons (PAHs) compounds were greater than their effects range low (ERL) except station 1 in two season, but concentrations of the 16 polycyclic aromatic hydrocarbons (PAHs) compounds were lower than their effects range median (ERM).

کلید واژگان :

PAHs, Heavy metal, Sediment, Toxici



ارزش ریالی : 500000 ریال
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