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Subject:
From:
Brian Ellis <[log in to unmask]>
Reply To:
TechNet E-Mail Forum <[log in to unmask]>, Brian Ellis <[log in to unmask]>
Date:
Mon, 11 Dec 2006 18:14:56 +0200
Content-Type:
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I disagree about the bioavailabilty. In a landfill, the lead glass is
inevitably crushed into small particles the total surface area is
therefore very large. As lead glass is slightly water soluble, the lead
can enter into run-off over a matter of years. What happens to this
water is the nux of the problem.

I agree that the quantity of lead in a modern computer is small, but
what about the zillions of CRT monitors still in use?

Brian

Thompson, David wrote:
> Glen / Ingemar:  CRTs do not contain layer of lead coating inside the
> tube.  The lead is contained in the glass and is not readily
> bioavailable in a landfill environment.
>
> Today's computers probably do not contain 1/2 pound of lead.
> Panasonic's current line up of laptops contain about 5 mg, a long way
> from 1/2 pound.
>
> David Thompson
> Panasonic
>
> -----Original Message-----
> From: TechNet [mailto:[log in to unmask]] On Behalf Of Glen Herzog
> Sent: Monday, December 11, 2006 10:15 AM
> To: [log in to unmask]
> Subject: Re: [TN] The 'poisonous'- computer reports
>
> Ingemar,  possibly this article is suspicious because it was written in
> 1996, long before LCD screens and long before the introduction of RoHS &
> WEEE.  CRTs have a heavy layer of lead in coating the inside of the
> envelope.  I'll bet that todays lead weight in a desktop would not
> exceed
> 1/2 pound.
>
> Table presented in: Microelectronics and Computer Technology Corporation
> (MCC). 1996. Electronics Industry Environmental Roadmap. Austin, TX:
> MCC.
>
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