Selective leaching of lead from lead smelter residues using EDTA.

ABSTRACT: Ethylenediaminetetraacetic acid (EDTA) has been widely used as an effective reagent for removal of lead from soil because of its high lead extraction efficiency caused by the high thermodynamic stability of the Pb(ii)-EDTA complex. In this study, EDTA was used as a lixiviant for recovery of lead from residues (matte and slag) of secondary lead smelter plants. The residues were composed mainly of iron (34-66 wt%) and lead (7-11 wt%). Leaching parameters (EDTA concentration, pH, temperature, liquid-to-solid ratio and leaching time) were optimized. The optimum leaching efficiency was achieved when leached for 1 h at room temperature using 0.05 mol L^-1 EDTA at a liquid-to-solid ratio of 5 mL g^-1. At such conditions, 72 to 80% of lead and less than 1% of iron were leached

SUBMITTER: Palden T 

PROVIDER: S-EPMC9057912 | biostudies-literature | 2020 Nov

REPOSITORIES: biostudies-literature