ozone depletion

(redirected from Ozone depleter)

ozone depletion

The ongoing reduction of ozone in the stratosphere. Ozone (O3) is present in 1 ppm in the upper stratosphere, and it absorbs virtually all of the UV radiation from the sun; increased rates of sun-induced malignancies (e.g., melanomas) have been attributed to the destruction of the ozone layer. Ozone depletion is caused by the release of chloride ions from CFCs (chlorofluorocarbons) after release from air conditioners, spray cans, and manufacturing plants that produce electronics and plastics. CFCs degrade in the atmosphere, release chlorine and cause ozone destruction, remain free, or react with ozone to form ClO (chlorine monoxide); O3 is being depleted at a rate of 4–5% per decade.
References in periodicals archive ?
Celli, a major manufacturer of power-driven tillage tools, has developed a system to reduce soil pathogens to replace methyl bromide, widely used throughout the world as a soil sterilant but being phased out as it is an ozone depleter (see sidebar).
Methyl bromide, which is still sometimes used as a termiticide, aerates more slowly and is an ozone depleter.
But it is an ozone depleter and is being phased out of use.
Also, 1,1,1 trichloroethane will be unavailable shortly, since it is an ozone depleter.
And at the end of the year, The EPA actually asked DuPont to slow down its phase out of CFC-12, an ozone depleter, on behalf o the auto industry, which still wants to use the chemical in it air conditioners.
Molders take note: After the 11th of this month, companies using any CFCs or HCFCs in their processes will have to print warning labels either on their products or shipping containers, depending on the type of ozone depleter.
The chemical, widely used in the marketing and transportation of grain and as a pre-plant fumigant, was listed as a Class I ozone depleter by the previous administration.
Methyl bromide was recently declared an ozone depleter by the parties to the Montreal Protocol, a group of nations that signed a treaty to protect the ozone layer.
In addition, the company has agreed to eliminate its use of carbon tetrachloride, an ozone depleter, and reduce its use of sulfuric acid and ammonia by modifying its processes and installing recycling equipment.
Our CFC alternative technologies go beyond traditional approaches, such as substituting one ozone depleter for a less harmful depleter, and instead introduce technologies that eliminate the use of CFCs in certain manufacturing processes," said David R.
This halocarbon reclamation facility will be state of the art with the latest, most advanced equipment for the reclamation and management of Halons and refrigerants that are either ozone depleters or high in global warming potential.
The technique could be an alternative to conventional fumigation, as some of the gases used in fumigation are being restricted because they are ozone depleters and in many cases plant and factories have to be closed down while fumigation takes place.