Guemiza, Karima; Mercier, Guy et Blais, Jean-François 
ORCID: https://orcid.org/0000-0003-3087-4318
(2015).
Pilot-Scale Decontamination of Small-Arms Shooting Range Soil Polluted with Copper, Lead, Antimony, and Zinc by Acid and Saline Leaching.
Journal of Environmental Engineering
, vol. 141
, nº 1.
04014054.
DOI: 10.1061/(ASCE)EE.1943-7870.0000887.
Résumé
The objective of this study was to evaluate at the pilot scale the performance of a chemical leaching process for Pb, Cu, Sb, and Zn removal from a fine fraction (<125∈∈μm) of soil at two Canadian small-arms shooting ranges (SASR; Batoche: 418∈mg∈Cu/kg, 5,006∈mg∈Pb/kg, 168∈mg∈Sb/kg, and 96∈mg∈Zn/kg; Normandie: 1,015∈mg∈Cu/kg, 6,024∈mg∈Pb/kg, 305∈mg∈Sb/kg, and 177∈mg∈Zn/kg). A comparison of different leaching reagents revealed that the use of H₂SO₄ (0.125M)+NaCl (4 M) is a very promising option from an economic point of view to solubilize metallic pollutants from highly polluted soils. The results showed that chemical treatment, including three successive acid-leaching steps (0.125MH₂SO₄+4MNaCl, PD=10%, t=1h, T=20°C) followed by one rinsing step using water [pulp density (PD)=10%, time (t)=15∈∈min, temperature (T)=20°C], resulted in metal removal yields of 93% Cu, 97% Pb, 89% Sb, and 70% Zn in Batoche soil and 85% Cu, 96% Pb, 59% Sb, and 49% Zn in Normandie soil. Subsequently, Sb and other dissolved metals (Cu, Pb, and Zn) were successfully recovered via chemical precipitation/coprecipitation (99.1% Cu, >99.9% Pb, 95.1% Sb, and 99.9% Zn - Batoche; 90.4% Cu, >99.7% Pb, 79.1% Sb, and >99.9%Zn - Normandie) by adding NaOH until pH=9.
| Type de document: | Article |
|---|---|
| Mots-clés libres: | acid leaching; antimony; copper; lead; metal; saline leaching; small-arms firing range soil; zinc |
| Centre: | Centre Eau Terre Environnement |
| Date de dépôt: | 20 avr. 2018 20:15 |
| Dernière modification: | 18 févr. 2022 20:23 |
| URI: | https://espace.inrs.ca/id/eprint/3856 |
Gestion Actions (Identification requise)
 |
Modifier la notice |