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Re: Aquatic Plants Digest V3 #56

> Date: Thu, 29 Jan 1998 17:52:46 -0600
> From: Cynthia S Powers <cyn at metronet_com>
> Subject: School of Environmental Studies
> >Date: Thu, 29 Jan 1998 10:16:19 -0500
> >From: Nick Zimmerman <zimmerman at unique-software_com>
> >Reply-To: zimmerman at unique-software_com
> >To: Aquatic-Plants at actwin_com
> >Subject: School of Environmental Studies
> >
> >My name is Katie and I go to the School of Environmental Studies. I am 
> >trying to gather information on the effects of the effect of 
> >Diethylene triamine pentacetic acid on plants and our water resources.   
> >I found your name under a website that I was looking at. If you happen 
> >to have any information I could use, please contact me at:
> >														KDK.BEAM.aol.com.
> >
Hi Katie, 

An article that may provide some information for you is 'Chelation Prior
to Hydrogen Peroxide Bleaching of Kraft Pulps:  An Overview,' by Lapierre,
Bouchard, Berry and van Lierop in the Journal of Pulp and Paper Science,
vol. 21, no. 8, August 1995.  It deals mainly with EDTA, but DTPA is
mentioned and it gives a few references for further reading on the
toxicology of chelants.  

I'm not sure what your project involves, but an interesting way to look at
the subject, at least with respect to environmental concerns in the pulp
and paper industry, is the net effect that chelants have.  Although they
are toxic in certain concentrations, they are often used in pulping
processes that reduce or eliminate the use of chlorine bleaching.  If you
want more information, you can e-mail me directly.  Good luck!

Chris Peart
Department of Physiology and Biophysics
Dalhousie University
Halifax, Nova Scotia, Canada
cpeart at is2_dal.ca