Ozone Recovery May Be Delayed by Rise of Paint Stripper Chemical- Dichloromethane (Download PDF)

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Because of unregulated ozone-depleting substance in the environment, the recovery of Antarctic ozone levels can be delayed by five to 30 years. Previously ignored chemical called dichloromethane may be contributing to ozone depletion.

  • The Montreal Protocol on Substances that Deplete the Ozone Layer was adopted in 1987 in Montreal and implemented in 1989. Initially, it contained 46 countries but now has almost 200 countries involved.
  • Ozone, is present mostly in upper atmosphere in the stratosphere (90%).
  • Ozone layer shields from certain solar wavelengths (UV) radiation
  • Also absorbs terrestrial IR influencing climate.
  • Ozone “hole” is an area of ozone depletion over Antarctica
  • Scientists at the University of Leeds discovered increasing concentration of VSLS (Very Short-Lived Substances) may be depleting ozone. Dichloromethane concentration has become high enough to cause noticeable destruction.
  • Expected to fully recover sometime between 2046 and 2057

Dichloromethane

  • Natural sources include oceanic sources, macroalgae, wetlands, and volcanoes
  • Volatility and ability to dissolve a wide range of organic compounds makes it a useful solvent for many chemical processes
  • Widely used as a paint stripper and a degreaser
Chemical Structure of Dichloromethane

Chemical Structure of Dichloromethane

Chemical Structure of Dichloromethane

Current State of Ozone With Montreal Protocol

Current State of Ozone With Montreal Protocol

Current State of Ozone With Montreal Protocol

Current State of Ozone Without Montreal Protocol

Current State of Ozone Without Montreal Protocol

Current State of Ozone Without Montreal Protocol

- Published/Last Modified on: July 7, 2017

Environment/Ecology

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