Selective leaching of zinc and lead from electric arc furnace dust using citrate and H2SO4 solutions. A kinetic perspective

The electric Arc Furnace Dust (EAFD) sample leaching using two different organic carboxylic anions has been previously studied, as a separate article. aim of the present research work (Part II) is study on kinetics EAFD, comparing efficiency sodium citrate with that sulfuric acid solutions. effect solid / liquid ratio, temperature and reagent concentration in solutions metallic dissolution was analyzed. In both cases, more stable phase franklinite (ZnFe2O4) experienced minimal decomposition at room temperature, although almost complete extraction zinc possible higher temperatures. conformed to reaction-controlled Shrinking Core Model. Using Arrhenius expression, apparent activation energies for lead dissolutions H2SO4 were evaluated. On other hand, showed promise due its selectivity non-ferrous metals oxides (ZnO PbO).