Quote:
Originally Posted by Jermyn Davidson
" As for crude oils, a very decent analysis by the American Petroleum Institute shows that all are toxic, but their effects vary with thickness and with the different chemistry seen in say, oil from the Gulf of Mexico and oil from Kuwait. The best estimate I've seen for South Louisiana Crude - after hours of exasperated research - comes from thesis work done at Louisiana State University several years ago. For instance, the study found that Louisiana crude had an LC50 of 4250 ppm for the warm-water loving killifish.
This suggests that crude oil is less acutely poisonous than chemical dispersants. But here's the really interesting finding in that terrific little study. Adding a dispersant - specifically Corexit 9500 - made the oil more poisonous. A lot more poisonous."
Corexit- oil dispersant produced by NALCO.
NALCO- oil dispersant company with a former BP executive as a member on its Board of Directors
My quote is from the article linked below.
http://scienceblogs.com/speakeasysci...centration.php
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Here's a video from NALCO explaining their product.
http://www.youtube.com/watch?v=orjr2...layer_embedded
That annoying background music (sounds like something from the Exorcist film) prevented me from hearing some of the commentary.
The blog you quote is not written by a real scientist - but by a journalism professor who teaches "advocacy journalism" at UW-Mad. Just something to keep in mind there. She may be correct - but her angle appears to be very acute.
The justification for using the Corexit appears to have been based upon experience gleaned from the Exxon Valdez spill. Corexit was originally produced by Exxon and was used along with other agents all of whose results have been compared over the years.
From what I have seen Googling around, it appears that there is a constant whine coming from environmentalists about just how to clean up an oil spill. Most of the environmental sites appear to offer nothing but criticism of the clean up efforts without ever offering anything constructive. These are not good sources of information.
Oil is toxic in sufficient quantities to just about everything except bacteria. Bacteria themselves are toxic in sufficient quantities to everything including themselves. Yet, it is the bacteria that we rely upon to "clean up" all of nature's messes. They will consume the "nutritious" petroleum and eventually the Gulf will be pristine again (except for the toxic Red Tides of bacteria, but that's another matter).
All of the attacks against the evil people at BP, NALCO and everyone else seems to be politically motivated. And, I haven't seen the POTUS abandon his huge gas guzzling Chevy Suburbans. We all use this oil and all of our jobs and lifestyle are dependent upon it. Even the shrimpers can't get out in their boats without large quantities of smelly diesel fuel.
The problem belongs to everyone. Those who are trying to clean it up should not be attacked nor demonized.