Yushchenko Ukrainian opposition presidential candidate Among the Most Toxic Chemicals Known to Humankind Dioxin PCDDs polychlorinated dibenzo dioxins Dioxin levels 80 times the State of Michigan cleanup standards were found near parks and residential areas in a floodplain south of the Cit ID: 265652
Download Presentation The PPT/PDF document "Viktor A." is the property of its rightful owner. Permission is granted to download and print the materials on this web site for personal, non-commercial use only, and to display it on your personal computer provided you do not modify the materials and that you retain all copyright notices contained in the materials. By downloading content from our website, you accept the terms of this agreement.
Slide1
Viktor A.
Yushchenko
Ukrainian opposition presidential candidate
Among the Most Toxic Chemicals Known to Humankind
Dioxin
PCDDs
polychlorinated
dibenzo
dioxinsSlide2
Dioxin levels 80 times the State of Michigan cleanup standards were found near parks and residential areas in a floodplain south of the City of Saginaw at the confluence of the
Tittabawassee and Saginaw Rivers.
Among the Most Toxic Chemicals Known to Humankind
Dioxin
PCDDs
polychlorinated
dibenzo
dioxins
Dioxin is formed as an unintentional by-product of industrial processes involving chlorine, e.g. waste incineration, chemical and pesticide manufacturing and pulp and paper bleaching. Dioxin was
present in Agent Orange (a defoliant used in the Vietnam War),
was found at
the Love Canal (a chemical dump site
in Niagara Falls,
NY)
and was the basis for evacuations at Times Beach,
MO (where contaminated waste oil was spread on dirt streets).
TR
SR
SB
ConfluenceSlide3
Among the Most Toxic Chemicals Known to Humankind
Dioxin
PCDDs
polychlorinated
dibenzo
dioxins
Research on dioxin sources concluded that the chemical was a ubiquitous product of the combustion of organic matter and the author of the study commented that, “We
now think that dioxins have been with us since
the advent
of fire.”Slide4
Among the Most Toxic Chemicals Known to Humankind
Dioxin
PCDDs
polychlorinated
dibenzo
dioxins
The
Hites Group
Indiana University
Association of dioxin with sediment.
Persistence of dioxin.
Geochronology of sediment.
Unimagined riches and Glory.
Nobel Prize.
Dawn of Fire.Slide5
Among the Most Toxic Chemicals Known to Humankind
Dioxin
PCDDs
polychlorinated
dibenzo
dioxins
Hmmmmmm
…Slide6
Among the Most Toxic Chemicals Known to Humankind
Dioxin
PCDDs
polychlorinated
dibenzo
dioxins
2011 - EPA and Dow Chemical Co. sign a legal agreement requiring Dow to clean up sediment in a three-mile stretch of the
Tittabawassee River next to Dow's Midland Plant.
Cap contaminated sediment with clean material.
Remove and treat DNAPL (Dense
Nonaqueous
Phase Liquids)
Isolate contaminated sediment with sheet pile and a
cap
and capture water
within the sediment and treat it.
Dredge and dispose of contaminated sediment
Management Actions