Transcript of Dispersant Recovery. Dispersants to clean oil The use of dispersants in the recovery The effect of...
- Slide 1
- Dispersant Recovery
- Slide 2
- Dispersants to clean oil The use of dispersants in the recovery
The effect of the dispersants on the recovery The recovery from the
dispersants
- Slide 3
- Dispersant The main dispersant used in Gulf was Corexit 9500
and Corexit 9527, produced by Nalco Nalco portrays itself as a
company striving for sustainable solutions to industrial problems.
The dispersants work by both being attracted to the water and oil
to lower the surface tension of the oil slick to allow for the oil
to dissolve. dioctyl sodium sulfosuccinate is the component that
has taken the longest to break down in the gulf water.
- Slide 4
- Use Dispersants were originally sanctioned by the EPA Lisa
Jackson, EPA administrator, acknowledges that, "So far the data
show we haven't done any damage and actually we've helped with
dispersion and used a lot less of the chemical in the process
(nola.com) Used then under the surface, never done before. Lisa
Jackson "none of the testing that was done prior to this incident
was what I'd call extensive and geared toward the long-term effects
or effects in the sub-sea. (nola.com) The idea was to break up the
oil before it reached the surface.
- Slide 5
- Effects Broke up the oil on the surface. Intended to let oil
settle to the bottom Created large dead zones 2 inches of oil on
the sea floor. Discovered by Samantha Joye of the university of
Georgia This is killing many of the filter feeders living on the
bottom of the sea. Samantha Joye, only about 10% of the oil was
consumed by microbes gulfblog.uga.edu
- Slide 6
- Nalco Nalco Material Safety Data Sheet. Do not take internally
Handle with protective clothing and gloves Use respirator or half
face mask when concentrations exceed given limits 5-10 Mg/m^3
States that none of the component are listed as know carcinogens It
does have the tendency to bio accumulate All this information is
for short term spills, not months of exposure The report states
that human risk is low
http://www.lmrk.org/corexit_9500_uscueg.539287.pdf
- Slide 7
- Affects Not being broken down The reduction to concentration is
due to the dilution over the vast area of the Gulf. Human illness
Exposure comes from inhalation, ingestion, and skin or eye contact
Nalco Material Data Safety Sheet BIOACCUMULATION POTENTIAL:
Component substances have a potential to bio concentrate
http://www.lmrk.org/corexit_9500_uscueg.539287.pdf
- Slide 8
- Lessons BP took control of the cleanup Need an organization
with broader concerns BP stock prices (msnbc.com)
- Slide 9
- Alternatives No Dispersants Environmentally friendly dispersant
Dispersit, made by PolyChem Water based 100% effective on Louisiana
crude by EPA Corexit is 54% BP tested small amounts but never
ordered a significant supply.
- Slide 10
- Closing Dispersant used Problems Recovery from dispersant
Lessons/ alternatives
- Slide 11
- Questions
- Slide 12
- Reference Collage
http://www.itopf.com/spill-response/clean-up-and-response/dispersants/
http://www.itopf.com/spill-response/clean-up-and-response/dispersants/
http://www.businessinsider.com/16-burning-questions-about-the-oil-spill-that-we-deserve-some-answers-
to-2010-6?op=1
http://www.businessinsider.com/16-burning-questions-about-the-oil-spill-that-we-deserve-some-answers-
to-2010-6?op=1
http://www.suite101.com/content/gulf-oil-spill-dispersant-rally-clean-gulf-a297695
http://www.suite101.com/content/gulf-oil-spill-dispersant-rally-clean-gulf-a297695
http://www.wired.com/wiredscience/2010/06/dispersant-confusion/
http://www.wired.com/wiredscience/2010/06/dispersant-confusion/
http://www.examiner.com/environmental-health-in-tampa-bay/gulf-oil-spill-clean-up-
methods-push-1-84-million-gallons-of-toxic-chemicals-
across-tampa-florida
http://www.examiner.com/environmental-health-in-tampa-bay/gulf-oil-spill-clean-up-
methods-push-1-84-million-gallons-of-toxic-chemicals-across-tampa-florida
http://www.popsci.com/science/article/2010-05/how-do-oil-dispersants-work
http://www.popsci.com/science/article/2010-05/how-do-oil-dispersants-work
http://www.salon.com/news/feature/2011/02/20/bp_oil_spill_lingers
http://www.salon.com/news/feature/2011/02/20/bp_oil_spill_lingers
Articles
http://www.nytimes.com/gwire/2011/01/27/27greenwire-study-undersea-dispersant-in-gulf-
of-mexico-li-64092.html
http://www.nytimes.com/gwire/2011/01/27/27greenwire-study-undersea-dispersant-in-gulf-
of-mexico-li-64092.html
http://news.mongabay.com/2011/0221-hance_oilspill.html
http://news.mongabay.com/2011/0221-hance_oilspill.html
http://www.nola.com/news/gulf-oil-
spill/index.ssf/2010/06/subsea_dispersants_the_ricght.html
http://www.nola.com/news/gulf-oil-
spill/index.ssf/2010/06/subsea_dispersants_the_ricght.html
http://www.commondreams.org/headline/2010/10/27-8
http://www.commondreams.org/headline/2010/10/27-8
http://www.lmrk.org/corexit_9500_uscueg.539287.pdf
http://www.lmrk.org/corexit_9500_uscueg.539287.pdf