REMOVING THE CADMIUM, ARSENIC AND SULFATE IONS FROM WET PROCESS PHOSPHORIC ACID

Abstract

Commercially, phosphoric acid is manufactured using different processes. The wet-process is the process applied in Syria using phosphate mineral, and phosphoric acid produced by this process contains a variety of impurities. This paper studies the precipitation of Cd, As and sulfate ions. The results show that the yield of precipitation of sulfate ion increases by increasing the concentration of barium carbonate and temperature. The precipitation of arsenic increases by increasing the concentration of sodium sulfide and temperature. The precipitation of cadmium was better under ambient temperature by sodium sulfide.