Stabilization, Testing, and Disposal of Arsenic Containing Wastes

摘要

Commercially available treatment processes intended to reduce leaching of contaminants from wastes were evaluated for arsenic-laden industrial wastes. Three wastes were selected: (1) Residues from the production of arsenical herbicides, (2) Filter cake from the refinement of food-grade phosphoric acid, and (3) flue dusts from nonferrous metal smelters. Each of these wastes was treated with many treatment (fixation) processes. The processes' ability to retard the leaching of arsenic was evaluated through the results of laboratory leaching tests. Several processes were found to reduce arsenic leaching rates by at least four orders of magnitude. Other processes were shown to have much less effectiveness.