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Li, H., Z. Han, Y. Qian, X. Kong, and P. Wang.
International Journal of Environmental Research and Public Health 16:2752(2019)

Groundwater contaminated with chlorinated hydrocarbons and BTEX was remediated using an in situ injection of Fe(II)-activated persulfate in a field test at a contaminated site in the North China Plain. An oxidant mixture of persulfate, ferrous sulfate, and citric acid was injected into the aquifer at depths of 8 and 15 m. The oxidation reaction occurred immediately, accompanied by a sharp increase of oxidation-reduction potential and a decrease in pH. Though the concentration of pollutants increased due to the dissolution of NAPL at the initial stage, BTEX was effectively degraded subsequently by persulfate in both depths with removal efficiency approaching 100%, whereas 1,2,3-trichloropropane achieved only a removal efficiency of 30-45% at different aquifers and monitoring wells. https://www.mdpi.com/1660-4601/16/15/2752/htm

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