| Origin of galena | Leachant | Ea (KJ/mol) | References | 
| Sivas, Turkey | 0.5 M HNO3/1 M H2O2 | 42.26 | Aydogan et al. [13] | 
| Sivas, Turkey | 3 M CH3COOH/0.5 M H2O2 | 65.60 | Aydogan et al. [18] | 
| Bor, Yugoslavia | 2 M H2O2/2 M H2SO4 | 60.00 | Antonijevic et al. [36] | 
| Abakaliki, Nigeria | 8.06 M H2O2/8.06 M HCl | 40.55 | Baba and Adekola [31] | 
| Abakaliki, Nigeria | 10 M HNO3 | 27.01 | This work |