Natural atmosphere cleaning Mechanism?

There are mechanisms in the biosphere that remove, assimilate and recycle natural pollutants. These pollutants disperse and dilute in the atmosphere. Then, as shown figure, a naturally cleanser, the Hydroxyl radicals (OH), oxidizes many of them to product that are harmless or that can be brought down to earth by precipitation.

Hydroxyl radicals are normally generated in nature(open air)

How does OH(Hydroxyl Radical) work

New Technology and under development

Wellis Chemical Reaction method (from UK)

Developed technology by UK Defense

Commercialized for European Hospital since 2009

Unique technology combine natural-scent oils with ozone to generate Hydroxyl radicals(OH) same as OH in the nature.

Hydroxyl radical(OH) Effect on air purifying.

Gas-phase radical chemistry in the troposphere

Paul S. Monks

Received 22nd November 2004
First published as an Advance Article on the web 28th February 2005
DOI : 10.1039/b307982c

Atmospheric free radicals are low concentration, relatively fast reacting species whose influence is felt throughout the atmosphere. Reactive radicals have a key role in maintaining a balanced atmospheric composition through their central function in controlling the oxidative capacity of the atmosphere. In this tutorial review, the chemistry of three main groups of atmospheric radicals HOX, NOX and XOX ( X=C2, Br, I ) are examined in terms of their sources, interconversions and sinks. Key examples of the chemistry are given for each group of radicals in their atmospheric context.

Sources : ” Gas-phase radical chemistry in the troposphere”, Paul S. Monks., Chem. Soc. Rev., 2005,Vol.34, pp376–395

The importance of Hydroxyl radical(OH) on the air-purifying

Study Finds a Decline in Natural Air Cleanser

Published: May 4,2001

Scientist say they have detected wide swings and, most recently, a sharp drop in atmospheric concentrations of chemicals that naturally purge the air of many kinds of contaminants and methane, a powerful heat-trapping greenhouse gas.
The scientists say they suspect that the decline is related to human activity, because the biggest drop was measured in the northern hemisphere, where most industry and other human activity is concentrated.
The researchers, who described their work in today’s issue of the journal Science, said there were still many uncertainties involved in calculating amounts of the molecules.

Sources : http://www.nytimes.com/2001/05/04/us/study-finds-a-decline-in-natural-air-cleanser.html “Study Finds a Decline In Natural Air Cleanser”, By ANDREW C. REVKIN , Published: May 4, 2001, NewYork Times.