Subject: | |
From: | |
Reply To: | |
Date: | Sat, 22 Dec 2012 18:24:49 -0500 |
Content-Type: | text/plain |
Parts/Attachments: |
|
|
Advanced chemistry is not one of my fields of expertise, but I have access to reports that others may not have. At any rate, this:
> The presence of polychlorinated dibenzo-p-dioxin and furan (PCDD/F) impurities has been demonstrated repeatedly for chlorophenols. This includes wood treatment fungicides pentachlorophenol.
> PCDD/Fs have also been detected in many currently used pesticides, including pentachloronitrobenzene (PCNB) and 2,4-dichlorophenoxyacetic acid (2,4-D)
> PCDD/F concentrations also increased in the 2,4-D formulation by 3000% during 96min of sunlight exposure (from 4.5 to 140 lg kg-1)
> The present study demonstrates that substantial formation of PCDD/Fs can occur when currently used pesticide formulations (containing PCDD/F precursors) are exposed to sunlight.
► Exposure to sunlight results in formation of dioxins in PCNB and 2,4-D pesticide formulations.
► TEQ increased by up to 9-fold via photolysis.
► High concentrations of dioxins may thus be formed via this pathway after pesticide use.
► Dioxin fingerprints in pesticides change considerably during sunlight exposure.
► The manufacture of commonly used pesticides can result in dioxin precursor formation.
Chemosphere 88 (2012) 364–370
Formation of dioxins during exposure of pesticide formulations to sunlight
***********************************************
The BEE-L mailing list is powered by L-Soft's renowned
LISTSERV(R) list management software. For more information, go to:
http://www.lsoft.com/LISTSERV-powered.html
Guidelines for posting to BEE-L can be found at:
http://honeybeeworld.com/bee-l/guidelines.htm
|
|
|