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Originally Posted by KV-1926R
...BTW, as Carmine said before, the lead cannot leach out of the glass. If it's good enough to seal up and dispose of radioactive waste (vitrification), it's good enough to contain the minute amounts of lead in TV screens.
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A typical big TV CRT contains about five pounds of lead. Here's a study on the leachablility of lead from CRTs and part of the conclusion.
http://www.google.com/url?sa=t&rct=j...0tBEZceQqHU1bA
Quote:
Cathode ray tubes (CRTs) are often referred to as being a hazardous waste because of the leaded glass they are constructed of. This fact, however, is not well documented in the scientific literature. A study was conducted to determine the validity of this claim and to produce such documentation. A total of 36 CRTs were tested for lead leachability using the U.S. EPA’s toxicity characteristic leaching procedure (TCLP). In initial testing, twenty-one of the thirty color CRTs exceeded the 5 mg/l of lead regulatory limit for characterization as a hazardous waste.
None of the six monochrome CRTs exceeded this limit. Follow-up testing demonstrated that by far the largest concentration of leachable lead is from the frit seal between the funnel and the face panel. The amount is large enough that if a representative glass sample from a color CRT is tested with the TCLP, it will in almost all cases exceed 5 mg/l of lead.
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