'Periodica Polytechnica Budapest University of Technology and Economics'
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