This study was conducted at Sawa lake, Al-Muthanna Governorate. The objective was to study the chemical properties of the sediments and the loin of the Sawa lake and the surrounding soil. The sediment samples were taken from the bottom of the lake and the kelp, besides, soil samples from the surrounding area. The chemical properties of soil and sediment such as Electrophoresis, total amount of soluble salts, reaction level, concentration of calcium, magnesium, sodium, potassium, nitrates, chlorides, sulphates, alcohols, boron and heavy metals cadmium and lead were determined. Values of electrical conductivity ranged from (80-14.4) dsm-1 and where the highest values were recorded in the soil surrounding the lake and the lowest value in the second site deposit. The values of TDS ranged between (40.8 – 7.2) gml-1 and soil interaction between 8.7-8.2 was found. The highest concentrations were observed in the soil and the lowest in the first site deposit. The concentration of calcium, magnesium, sodium, chloride and sulfate were increased on the expense of other ions. The concentration of nitrates decreased within the range of 2.45-0.84 mgl -1 and and so was boron 3.76-0.086 mgl-1 The lead values ranged from 0.0431-0.0067 mgl-1 , where the highest value in the shoulder of the first site and the lowest value was in the sediment of first site (2.8247-0.9413 mgl-1). The highest concentration in the shoulder of the second site and the lowest concentration in the soil of Lake Sawa. The mineral analysis of the soil and sediment showed the presence of kaolinite, mica and chlorite minerals in the sediments and the lake and montamolite in the lake and the ballcroxite in the soil surrounding the lake with the irregular mica-smectite in the shoulder of the first site in the lake.
Abdul Mohsin. A. Radi
Hussein Q. Allawi