In situ vitrification and removal of lead-based paint for steel structures

Book · Sun Dec 31 04:00:00 EST 1995

OSTI ID:379575

Covey, S; Lattimore, L; Kumar, A ^[1]

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1. Army CERL, Champaign, IL (United States)

The feasibility of in-situ vitrification of lead oxide contained in red lead based organic coatings was investigated. The removal of organic lead-based primers and paints has been achieved by a flame spray process that uses a glass/ceramic compound designed for high lead solubility and resistance to devitrification. The glass/ceramic compounds were prepared by fusing, fritting, and ball milling to produce the desired powder. The result powder was collected and used to flame spray previously prepared samples containing a commonly used red lead primer. Oxyacetylene flame spray technology was used to apply the glass compound to the steel substrate. The resulting glass waste was collected and analyzed for lead content using Energy Dispersive Spectroscopy (EDS) and X-Ray Diffraction analysis. The lead cation leachability rates were determined by the US Environmental Protection Agency (EPA) approved Toxicity Characteristic Leaching Procedure (TCLP). The designer glass waste form that exhibited the best results was a borosilicate glass with iron oxide additions. The iron silicate glass waste form leached approximately 1 ppm of lead during the TCLP, far below the current 5 ppm limit for hazardous waste.

• OSTI ID: 379575
• Report Number(s): CONF-9509182--; ISBN 0-87170-541-9
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
54 ENVIRONMENTAL SCIENCES
ACETYLENE
CHEMICAL COMPOSITION
EXPERIMENTAL DATA
FLAME SPRAYING
GLASS
IRON COMPOUNDS
LEACHING
LEAD OXIDES
LIQUIDS
OXYGEN
PAINTS
PARTICLE SIZE
POWDERS
REMOVAL
SCANNING ELECTRON MICROSCOPY
SILICATES
SOLUBILITY
TOXICITY
X-RAY DIFFRACTION
X-RAY FLUORESCENCE ANALYSIS
X-RAY SPECTROSCOPY