Resistance of various building materials to ozone deposition

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Abstract
Experimental results are presented to show surface resistance of bricks, concrete and glass to ozone deposition. The experimental work has been carried out in a small stirred box and the resistances calculated from the half‐life of ozone in the box, assuming a first order decay process over the surfaces used. Over the surfaces examined r ranged from 200 s cm−1 for FEP Teflon to 0.4 s cm−1 for wet bricks. Experiments using the same box over grass give a range of results from 1.3 s cm−1 to 0.7 s cm−1 depending on the time of day, windspeed, solar radiation and other variables which affect stomatal behaviour. This compares with literature values of 5.9 to 0.5 s cm−1. (1,2)

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