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Environmental fate & pathways

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Substances of the Persulfate Category are not stable in the environment. Persulfates are soluble in water and their vapour pressures are negligible. Upon contact with water or water vapour substances of the Persulfate Category hydrolyse into cation and persulfate anion. Hydrolysis is temperature and pH dependent and decomposition rates increase with decreasing pH and increasing temperature. The persulfate anion, independent of the cation, undergoes further decomposition in normal water or acid conditions, readily oxidizing water to oxygen, producing sulphate and hydrogen ions. All persulfate decomposition products are ubiquitous to the environment. Hydrolysis is metal catalyzed, and rapid reaction with organic matter is also possible. Biodegradation is not applicable to substances of the Persulfate Category, as the substances are inorganic.