Metals distribution in solidified/stabilized waste forms after leaching

Journal Article · · Hazardous Waste and Hazardous Materials; (United States)

DOI:https://doi.org/10.1089/hwm.1992.9.163· OSTI ID:6969780

Cheng, K Y ^[1]; Bishop, P ^[2]

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1. Dames and Moore, Cincinnati, OH (United States)
2. University of Cincinnati, OH (United States)

A series of leach tests were conducted to study the metal distributions in cement-based waste form before and after leaching in acetic acid solutions. The specimens were prepared in the laboratory with a Type I portland cement and sludges containing high levels of lead, cadmium, and arsenic. Metal contents in the specimen were determined by both the SEM/EDX method and the Wet digestion/AA method. A kernel surrounded by a surface layer was observed in every leached specimen. In the surface layer, most of the calcium and the stabilized metals (Pb, Cd, and As) were removed by the leachants. The metal contents of the kernal, however, were very close to those of the original material.

• OSTI ID: 6969780
• Journal Information: Hazardous Waste and Hazardous Materials; (United States), Journal Name: Hazardous Waste and Hazardous Materials; (United States) Vol. 9:2; ISSN 0882-5696; ISSN HWHME2
• Country of Publication: United States
• Language: English

Related Subjects

54 ENVIRONMENTAL SCIENCES
540220* -- Environment
Terrestrial-- Chemicals Monitoring & Transport-- (1990-)
ARSENIC
CADMIUM
CONTAMINATION
DISSOLUTION
ELEMENTS
LEACHING
LEAD
MANAGEMENT
METALS
PHASE TRANSFORMATIONS
PROCESSING
SEMIMETALS
SEPARATION PROCESSES
SOILS
SOLIDIFICATION
STABILIZATION
WASTE DISPOSAL
WASTE MANAGEMENT
WASTE PROCESSING