Edouard Bastarache on wed 29 nov 00
Hello all,
another known "source" of dioxins are forest fires (Muskerjee, 1998),
among others.
Later,
Edouard Bastarache
Sorel-Tracy
Dans / In "La Belle Province"
edouardb@sorel-tracy.qc.ca
http://www.sorel-tracy.qc.ca/~edouardb/
-----Message d'origine-----
De : ACTSNYC@CS.COM
=C0 : CLAYART@LSV.CERAMICS.ORG
Date : 29 novembre, 2000 21:33
Objet : Re: dioxin-free ball clays? (fwd)
> ---------- Forwarded message ----------
>> Date: Tue, 28 Nov 2000 23:04:17 -0800
>> From: Earl Brunner
>> Reply-To: Ceramic Arts Discussion List
>> To: CLAYART@LSV.CERAMICS.ORG
>> Subject: Re: dioxin-free ball clays?
>>
>> Do we know what it is about Ball clays that causes them to have the
>> dioxin in them in the first place?
>> I ask, only because I'm curious as to whether or not some of our othe=
r
>> chemicals might be contaminated as well. Specifically, but not limit=
ed
>> to, other clays that we use. <
>
>1) No. No one knows why the dioxins are there. There are all kinds of
>theories, but most involve coal beds and organic matter decomposition. =
And
>this will not explain the dioxin in materials of different origins.
>
>2. FDA tested 15 other anti-caking minerals. Nine of the 15 were found=
to
>contain dioxins. Included in the dioxin-containing group were products
>labeled "montmorillonite," "bentonite," "ground clay," "silicate" and
"lime."
> These products were not defined mineralogically by FDA because all the=
y
>were concerned about was that these were being mixed with animal feed in
>small amounts and that the products originated from mines and/or quarrie=
s.
>
>But FDA did say clearly that none of the dioxin-containing minerals in t=
his
>series of tests were ball clays. So somehow, dioxins arise in geologica=
l
>deposits of various types.
>
>
>Monona Rossol
>ACTS
>181 Thompson St., #23
>NYC NY 10012-2586 212/777-0062
>
>ACTSNYC@cs.com
>answering:
>>--Earl Brunner
>> http://coyote.accessnv.com/bruec
>> mailto:bruec@anv.net
>>
>
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ACTSNYC@CS.COM on wed 29 nov 00
---------- Forwarded message ----------
> Date: Tue, 28 Nov 2000 23:04:17 -0800
> From: Earl Brunner
> Reply-To: Ceramic Arts Discussion List
> To: CLAYART@LSV.CERAMICS.ORG
> Subject: Re: dioxin-free ball clays?
>
> Do we know what it is about Ball clays that causes them to have the
> dioxin in them in the first place?
> I ask, only because I'm curious as to whether or not some of our other
> chemicals might be contaminated as well. Specifically, but not limited
> to, other clays that we use. <
1) No. No one knows why the dioxins are there. There are all kinds of
theories, but most involve coal beds and organic matter decomposition. And
this will not explain the dioxin in materials of different origins.
2. FDA tested 15 other anti-caking minerals. Nine of the 15 were found to
contain dioxins. Included in the dioxin-containing group were products
labeled "montmorillonite," "bentonite," "ground clay," "silicate" and "lime."
These products were not defined mineralogically by FDA because all they
were concerned about was that these were being mixed with animal feed in
small amounts and that the products originated from mines and/or quarries.
But FDA did say clearly that none of the dioxin-containing minerals in this
series of tests were ball clays. So somehow, dioxins arise in geological
deposits of various types.
Monona Rossol
ACTS
181 Thompson St., #23
NYC NY 10012-2586 212/777-0062
ACTSNYC@cs.com
answering:
>--Earl Brunner
> http://coyote.accessnv.com/bruec
> mailto:bruec@anv.net
>
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