Your SlideShare is downloading. ×
0
Dioxin Exposure And Health
Dioxin Exposure And Health
Dioxin Exposure And Health
Dioxin Exposure And Health
Dioxin Exposure And Health
Dioxin Exposure And Health
Dioxin Exposure And Health
Dioxin Exposure And Health
Dioxin Exposure And Health
Dioxin Exposure And Health
Dioxin Exposure And Health
Dioxin Exposure And Health
Dioxin Exposure And Health
Dioxin Exposure And Health
Dioxin Exposure And Health
Dioxin Exposure And Health
Dioxin Exposure And Health
Dioxin Exposure And Health
Dioxin Exposure And Health
Dioxin Exposure And Health
Dioxin Exposure And Health
Dioxin Exposure And Health
Dioxin Exposure And Health
Dioxin Exposure And Health
Dioxin Exposure And Health
Dioxin Exposure And Health
Dioxin Exposure And Health
Dioxin Exposure And Health
Dioxin Exposure And Health
Dioxin Exposure And Health
Dioxin Exposure And Health
Upcoming SlideShare
Loading in...5
×

Thanks for flagging this SlideShare!

Oops! An error has occurred.

×
Saving this for later? Get the SlideShare app to save on your phone or tablet. Read anywhere, anytime – even offline.
Text the download link to your phone
Standard text messaging rates apply

Dioxin Exposure And Health

2,190

Published on

Published in: Health & Medicine, Technology
0 Comments
0 Likes
Statistics
Notes
  • Be the first to comment

  • Be the first to like this

No Downloads
Views
Total Views
2,190
On Slideshare
0
From Embeds
0
Number of Embeds
0
Actions
Shares
0
Downloads
0
Comments
0
Likes
0
Embeds 0
No embeds

Report content
Flagged as inappropriate Flag as inappropriate
Flag as inappropriate

Select your reason for flagging this presentation as inappropriate.

Cancel
No notes for slide

Transcript

  • 1. Dioxin exposure and health effects “ Let us watch well our beginnings, and results will manage themselves”                          Alexander Clark Maryna Kuzminska Master student in Chemistry University of Leipzig Leipzig, 2010
  • 2. Contents
    • What are dioxins:
    • general information
    • 2. Behavior of dioxins in the environment:
    • how long dioxins remain in the environment?
    • 3. Sources of dioxins contamination:
    • where are dioxins found?
    • how do dioxins enter the environment?
    • Dioxin toxicity:
    • effects on humans; dioxin incidents
    • How to avoid dioxins:
    • few tips
    • Conclusions
  • 3. 1. What are dioxins?
  • 4. Dioxins
    • group of polyhalogenated compounds
    • colorless and odorless solids
    • T melt depends on numbers of chlorine atoms
    • water-insoluble
    • environmental pollutants toxic substances
    2,3,7,8-tetrachlorodibenzo-p-dioxin (TCDD) - toxicity is compared to TCDD (from 0 to 1)
  • 5. 2. Behavior of Dioxins in the environment
  • 6. Behavior of dioxins in the environment
    • Dioxins are absorbed by plants and by soil
    • Landfill leakage into soil
    • Accumulation in food chain
    • Emissions: can be transported long time in air
    • Chemical-resistant
    • Half-decay period is more than 10 years
  • 7. 3. What are the major sources of dioxins?
  • 8. Sources of dioxins contamination Waste Incineration 2% Energy Generation 4% Other High Temperature Sources 1% Metallurgical Processes 3% Chemical Manufacturing 1% Land Sludge Application 4% Societal 5% (e. g., residential wood combustion, crematoria, gasoline and diesel use) Industrial 15% Natural Forest Fires 54% Backyard Trash Burning 26%
  • 9. 4. Dioxin toxicity and human health effects
  • 10.
    • disrupting chemical
    • binds to cell hormone receptors
    • modifies the functioning and the
    • genetic mechanisms of the cell
    • causes a wide range of effects
    Dioxin
  • 11. Minimum toxic dose – 0,5-1 μ g/kg
    • Symptoms of acute
    • toxic exposure:
    • lack of appetite
    • physical weakness
    • chronic tiredness
    • depression
    • weight loss
    • Diseases:
    • cancer
    • chloracne
    • porphyria
    • diabetes
    • damaging the immune system
  • 12. 5. Dioxin contamination incidents
  • 13. 1976, Italy
    • Accident at a chemical factory in Seveso
    • A cloud of toxic chemicals, including TCDD, was released into the air;
    • contamination - 15 km 2 inhabited by 37 000 people
  • 14. 1997, the USA
    • Chickens, eggs, and catfish were contaminated with dioxins when a tainted ingredient was used in the manufacture of animal feed
  • 15. 1998, Brazil
    • High levels of dioxins in milk sold in Germany were traced to citrus pulp pellets used as animal feed exported from Brazil
    • a ban on all citrus pulp imports to the EU from Brazil
  • 16. 1999, Belgium
    • High levels of dioxins were found in poultry and eggs
  • 17.
    • Detection of increased dioxin levels in milk (traced to a clay used in production of animal feed)
    2004, the Netherlands
  • 18. 2006, the Netherlands
    • Elevated dioxin levels were detected in animal feed;
    • The source - contaminated fat used in production of feed
  • 19. 2004, Ukraine 2004 - Ukrainian President  Victor Yushchenko was poisoned with dioxin (TCDD) three and a half years after poisoning before poisoning three months after poisoning
  • 20. 6. How to avoid dioxins? Recommendations in the Dietary Guidelines
  • 21.
    • Choose fish, lean meat, poultry, and low or fat-free dairy products
    • Increase consumption of fruits, vegetables and grain products
  • 22.
    • Beef or pork meet should be avoided (it has the largest concentrations of dioxin of all food sources)
    • Limit your intake of ocean and freshwater fish
    • Vegetarian meat substitutes such as tofu, beans and rice have essentially no contamination!
  • 23.
    • Drink only skim milk since dioxins exist in the butterfat
    • Avoid all full-fat dairy products: butter, cheese, ice cream
    • Use non-fat skim-milk products or non-dairy substitutes
  • 24.
    • Wash all fruits and vegetables carefully to remove chlorophenol pesticide residue
    • Avoid grapes and raisins unless they are clearly labeled as organic (grown without pesticides)
  • 25.
    • Use unbleached (brown) coffee filters
    • If you smoke cigarettes (although tobacco has other cancer hazards) roll your own in unbleached paper
  • 26.
    • Avoid all organic chemicals that have "chloro" as part of their names
    • Avoid chlorine bleach and products containing it
    • Use unbleached paper products
  • 27.
    • Avoid household or personal products and toys made of or packaged in polyvinyl chloride - PVC (labeled V on plastic)
  • 28.
    • The way to reduce the dioxin threat is to stop burning trash and to stop producing PVC and other chlorinated chemicals!
  • 29. 6. Conclusions
    • Dioxins are super-toxic chemicals
    • Dioxins are unwanted by-products of different processes
    • Dioxins enter the food chain through animals
    • Dioxin levels in environmental samples, in food have decreased over the 1970s till present
    • Effects of dioxins on human health
    • Proposed dietary recommendations
  • 30. References:
    • www.cdc.gov/exposurereport
    • Gullett, B.K. and Touati, A. (2003). PCDD/F emissions from forest fire simulations, Atmospheric Environment 37, p. 803
    •   www4.nas.edu/cp.nsf/Projects+by+PIN/BEST-K-03-08-A?OpenDocument
    • http://www.who.int/ipcs/assessment/en/index.html
  • 31. Thank you!

×