Introduction: Soils from two lead-battery reclamation sites contained lead up to 50,000 parts per million or 5%. Evangelista devised engineering studies to mobilize this lead from the soils.
Soil Washing to Remove Lead. Evangelista first classified soil into separate soil fractions by particle size. This segregation allowed the wash strategies to be tailored to the different fractions. Next, Evangelista washed soil fractions in EDTA and water to remove the toxic lead by chelation. High pressure water without additives cleaned the largest soil fraction. The novel remedial technique removed up to 86% of the lead from the fine soil fractions and up to 97% of the lead in the coarse fractions.
More Information. Lead Contamination Removal by Soil Washing. R. Evangelista and A. Zownir. Air Pollution and Waste Management Control Association Annual Meeting, Anaheim, CA.
PDF 1.0 MB
Lead Extraction from Excavated Soil. R. Evangelista and A. Zownir. Fifth National RCRA/Superfund Conference, Hazardous Waste and Hazardous Materials, Las Vegas, NV. Conference Proceedings of the Hazardous Material Control Research Institute.
PDF 1.3 MB
Lead Extraction Process. R. Rayford, R. Evangelista, and R. Unger, Prepared for the U.S. Environmental Protection Agency. PDF 11.4 MB
Cleaning Contaminated Excavated Soil Using Extraction Agents. D. Dietz, C. Marlowe, P. Albulescu, R. Evangelista, and R. Rayford, Prepared for the U.S. Environmental Protection Agency.
PDF 3.0 MB
