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Aside from H2O, CO2 and O2, also chlorine, ammonia...

Aside from H2O, CO2 and O2, also chlorine, ammonia, sulphur and sulphur dioxide can be used as agents for physical activation, although they are rarely used The use of ammonia or sulphur dioxide can be also considered as a modification
 2018-07-23T12:14:46

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