Abstract:
The aim of this study was to investigate the occurrence of the main acid radicals in Sudanese Trona ore samples. Eight (8) Trona ore samples were obtained from Khartoum state local markets and Elfasher city markets at Northern darfor state. The measured parameters included pH values, moisture content, concentration of carbonate (CO3=), hydrogen carbonate (HCO3-), sulfate (SO4=) chloride (CL-), silicon dioxide (SiO2), and phosphorous (P). pH meter was used for pH values determination. Moisture content was determined by electrical furnace. Carbonate, hydrogen carbonate and chloride concentrations were measured titrimetrically. Sulfate concentration was obtained by analysis as (BaSO4). Phosphorous content was determined by gravimetric analysis UV-Vis spectrophotometer. The analysis of samples showed different pH values and moisture content. The chemical parameters also showed different concentrations. pH-values range from (8.87 to 9.70). Moisture content ranges from (5.00% to 20.72%). The range of carbonate as (Na2CO3) was found to be (10.95 % to 47.47%), the hydrogen carbonate as (NaHCO3) ranges from (3.35% to 50.66%). Chloride as (NaCL) ranges from (1.11% to 49.62%). Sulfate as (Na2SO4) ranges from (zero to 2.72%). Silica as (SiO2) ranges from (1.29% to 68.31%). Phosphorous as (P) was found to range from (0.0002% to 0.0024%). The pH values indicate relatively alkalinity in all samples. Moisture content was found to be low in three samples (5.00%, 5.16% and 5.23%) and relatively high in four samples (17.65% to 20.72%). The highest carbonate content was shown by two samples as (37.03% and 47.47%). The highest bicarbonate content was shown by three samples as (43.01%, 43.35% and 50.66%). The highest chloride content was shown by one sample as (49.62%). The highest sulfate was (2.72%). Silica as (SiO2) showed high values in three samples as (30.44%, 35.82% and 68.31%). Phosphorous content was very low in the eight samples.
