Brian
Well said...
Carey
-----Original Message-----
From: Brian Ellis <[log in to unmask]>
To: [log in to unmask] <[log in to unmask]>
Date: Thursday, December 02, 1999 9:51 AM
Subject: Re: [LF] Environmental impact of lead-free soldering
>Erik
>
>Thank you for your thoughts.
>
>I have reached similar conclusions but through different logic. I am not
convinced about the ECO-IT
>calculations: there seems a lot of arbitrary here. For example, the overall
impact of tin seems remarkably
>low, when you consider the numbers of square km of primary tropical rain
forest (the oldest in the world) that
>have been destroyed for good in Malaysia, Indonesia and Thailand to provide
us with the metal. I grant you
>that a lot of the devastated land has now got secondary rain forest growing
on it, but this does not support
>much of the original wildlife but can support crop pests which the primary
forest doesn't.. Alluvial
>extraction is much more damaging to nature than deep mining, where only the
waste heaps cause very local
>environmental damage. Both require large amounts of energy but much is
supplied in Malaysia by hydroelectric
>sources, the dams also flooding rain forest.
>
>Another factor that is not addressed is the lead in CR tubes which is much
more potentially damaging to the
>environment than lead in solder.
>
>The whole problems of lead in electronics in landfills is, IMHO, based on a
false fundamental premisse. That
>is that lead will reach ground water. I will grant that it is conceivable
that, over a period of time
>(counting in hundreds of years or more), all the lead in a TV set or
whatever MAY undergo transformation into
>poorly soluble salts, on the grounds that we can never know the chemistry
of a landfill because we can never
>know what is dumped in it. This leaching will contaminate run-through
water. What will happen then: there will
>be an ion exchange between the iron (and some other metals) in the
underlying soil and rock and the lead will
>be fixed, never penetrating far enough to contaminate even vadose water,
let alone phreatic sources.
>
>Notwithstanding, I am in favour of the WEEE directive that 70% by weight of
electronics equipment (not
>counting CR tubes) must be recycled (HOW????? That is another matter!). The
easiest and cheapest part of all
>to recycle is the solder. So, if there is quasi-zero lead left over in the
30% that is landfilled, WHY THE
>HELL BAN LEAD IN SOLDER??????? The whole thing is nonsense, dreamed up by
technocrats obeying political
>masters who know that banning lead, thereby "protecting" children's health,
is just a vote-puller.
>
>Just a few thoughts....
>
>Brian
>
>"" wrote:
>
>> Dear all,
>> Please find a contribution on environmental impact of lead-free soldering
in the attached Word97 document.
>>
>> Best regards,
>> Erik
>>
>> -------------------------------------------------------------------------
-------
>> Erik E. de Kluizenaar
>> Philips CFT - Electronic Packaging & Joining (EP&J)
>> Building SAQ-p
>> p/o box 218
>> 5600 MD Eindhoven - The Netherlands
>> Tel/Fax: (+31 40 27) 36679/36815
>> E:mail [log in to unmask]
>> http://pww.cft.philips.com/cfteurope/processtech/elpajo/index.htm
>> -------------------------------------------------------------------------
-------
>>
>> -----------------------------------------------------------------------
-
>> Name: Environmental impact
ofleadfree.doc
>> Environmental impact ofleadfree.doc Type: Winword File
(application/msword)
>> Encoding: base64
>
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