Determination of the concentrations of some Heavy metals in Seawater and marine sediment from the coast of Lattakia city
Abstract
This research focuses on the concentrations of some heavy metals (pb, cd, cu) were determined in water and sedimentary samples from different areas along the coast of Lattakia city during the months of August 2020 and February 2021 using the Atomic Absorption Spectroscopy.
The results showed a correlation between the change in the concentrations of lead, cadmium and copper at the sites of sample collection and with the change in the hydrochemical factors. It was observed that the concentrations of the heavy metal elements studied in the Al-Kabeer Al-Shamali estuary area and the Saqia Musa estuary compared with the rest of the studied sites, accompanied by a decrease in the temperature, salinity and pH values. marine waters.
Copper concentrations ranged between 0.001mg/l in summer and 0.01mg/l in winter in marine waters, and between 2.8mg/kg in summer and 6.8mg/kg in winter in sedimentary samples. As for lead, the highest value was 0.2mg/l in summer and 0.09mg/l in winter, in marine waters, accompanied by high concentrations in sediments between 46.3mg/kg in summer and 18.2mg/kg in winter. It was observed that the concentrations of cadmium and copper were similar in the water samples, where the concentrations ranged between 0.001mg/l in summer and 0.01mg/l in winter, and high concentrations in sediments ranged between 1.2mg/kg in summer and 3.2mg/kg in winter, This is due to the fact that the source of pollution is one.
The highest concentrations of cadmium, copper and lead were recorded in sewage estuaries and rivers because they have a low mean energy (water flow velocity) and relatively high deposition environments compared to the rest of the studied sites, which contributed to an increase in the concentrations of the studied mineral elements in sediments compared to marine waters, in addition to the contribution of hydrochemical factors studied.
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