Alkaline decomposition–cyanidation kinetics of argentian natrojarosite

Kinetic modeling of the alkaline decomposition of potassium arsenojarosite

“…Therefore, arsenic can be incorporated into the structure of the jarosites, which work as an inerting medium for this toxic element. Regarding this, Dutrizac et al 8,9 studied the incorporation of arsenic as AsO 4 3− in the lattice of potassium, sodium and lead jarosite at 97 and 150 o C. Patiño et al [10][11][12][13][14] have thoroughly studied the alkaline reactivity of argentian jarosites in alkaline medium. Although there are several studies related to the alkaline decomposition of jarosite type compounds, only few ones are related to jarosite type compounds with arsenic.…”

Acid decomposition and thiourea leaching of silver from hazardous jarosite residues: Effect of some cations on the stability of the thiourea system

“…Two types of jarosite decomposition processes are reported: the thermal decomposition and the hydrothermal (alkaline or acid) decomposition [4][5][6][7][8][9][10][11][12][13][14][15][16][17][18][19][20][21][22][23]. The acid decomposition proposes the jarosite decomposition with heat (90°C to 250°C), and, in some cases, pressure; and promotes the formation of sulfate species soluble in acid media (Eq.…”

Kinetic Analysis of the Decomposition of the KFe3(SO4)2-x(CrO4)x(OH)6Jarosite Solid Solution in Ca(OH)2Medium

“…This kind of behavior is similar to that previously studied in synthetic jarosites. 29,32,35,48 Decomposition reactions are usually stoichiometric, but in this case the reaction is incongruous, as the molar fractions do not coincide with the conducted calculations. The molar fraction of K + and SO 4 2− in aqueous solution is very close to the molar fraction in solids.…”

“…For the two syntheses performed, a procedure similar to that reported in previous works was followed; [31][32][33][34][35][36] the conditions are specified in Table 1 . The reactor was placed on a heating plate with automatic temperature control and a precision of ca.…”