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Article 233 of triangle.gardens:
Newsgroups: triangle.gardens
Path: samba.oit.unc.edu!concert!inxs.concert.net!taco!math.ncsu.edu!crsc
From: crsc@math.ncsu.edu (CRSC Account)
Subject: Re: Cold Frame Materials Question
Message-ID: <1993Dec14.142015.25464@ncsu.edu>
Summary: Don't use treated wood!
Sender: news@ncsu.edu (USENET News System)
Organization: North Carolina State University
References: <CHzBr7.58K@unx.sas.com>
Date: Tue, 14 Dec 1993 14:20:15 GMT
Lines: 28
In article <CHzBr7.58K@unx.sas.com> sasbaa@fang.unx.sas.com (Anne Albright) writes:
>
> Does anybody know what the considerations are for choosing a
>type of wood to use for a cold frame (that will be used for vegetables)?
>
> I am interested in what preservatives can be used on the
>wood, if any, that won't cause a problem leaching into the soil or with
>fumes being absorbed by the plants. Is treated wood ok? Is it ok to
>use varnish? What can I put on untreated wood that would be ok?
>
> Thanks a lot.
Check out the latest copy of Organic Gardening for the most thorough discussion
I've yet seen regarding the use of pressure-treated wood for gardening.
Although they didn't discuss alternatives in this article, (I think they did
in an article earlier in the year) I won't be using treated wood in any
projects in my garden unless they will be completely sealed - painted or
waterproofed. They cite research that shows that contact with acidic
organics like compost, speeds the leaching of the chemicals into the soil.
One of the chemicals involved is arsenic; it can be absorbed by plants
and is particularly concentrated in the roots. I don't know if varnish is
ok for plants, but it probably would be a good way to seal the wood and
prevent chemical leaching. For other possible wood to use, you might consider
cedar (I think it has similar properties to redwood, which is about the
only wood used in outdoor projects in CA).
-- Lisa Becker
Õ . ¨ .. Õ water-treatment Õ bioremediation Õ 0 &composting-to-clean-contaminated-soils Õ groundwater-remediation Õh #fungal-mediated.soil-bioremediation From Gerhild.Donnevert@mni.fh-giessen.de Tue Apr 11 22:44:06 EDT 1995
Article: 55790 of sci.environment
Newsgroups: sci.environment
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From: Gerhild.Donnevert@mni.fh-giessen.de (Gerhild Donnevert)
Subject: Re: arsenic in the envoronment
Sender: news@muster.hrz.uni-giessen.de
Message-ID: <D6tpH6.15H3@muster.hrz.uni-giessen.de>
Date: Mon, 10 Apr 1995 14:27:06 GMT
References: <3lvfgn$4d1@mark.ucdavis.edu>
Organization: FH Giessen-Friedberg, Germany
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In article <3lvfgn$4d1@mark.ucdavis.edu>, fzyenath@chip.ucdavis.edu (Geeta Bharathan) says:
>
>Does anyone here know of instances where arsenic has been found in the
>natural environment in high enough levels to pose a danger to living beings?
>
>Could you e-mail me any information (including references) that you might
>have on this topic, especially ways to deal with the problem? I will post
>a summary of replies that I receive if there is interest.
>
>
>Thanks in advance.
>
>Geeta
Hallo!
I am working about arsenic in environmental matrices. Sorry, I have no
information for you yet. But I`ll see, what I can do for you. I think,
I´ve noticed something in a book about trinking-water-pollution.
Do you know anything about the analysis of arsenic in soil or air by
Zeeman-Graphite-AAS (Direct Solid Sample Analysis without Chemical
Decomposition)?
Hope to stay in contact.
Angelika