free chlorine vs total chlorine vs residual chlorine
The extensive destruction of the ozone by CFCs is due to two factors. The level of residual chlorine found at around 00002 g per litre which is too small to cause any health problems directly.
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The chlorine concentration recommended by World Health Organization is between 00005 and 00002 gL.
. 1 the chemical stability under ambient environmental conditions and low aqueous solubility of CFCs result in long lifespans of these chemicals that permit ample time for CFC molecules to diffuse into the upper atmosphere and 2 once in the stratosphere CFCs break down under exposure.
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