Diclofenac, salicylic acid and ibuprofen are non-steroidal anti-inflammatory drugs (NSAIDs), commonly used as drugs in clinical medicine. Persulfate is the most efficient and commonly used oxidants in in-situ chemical oxidation (ISCO) of organic contaminants. The objective of this study was to evaluate the degradation of pharmaceuticals (diclofenac, salicylic acid and ibuprofen) in a Fe(II) activated persulfate oxidation. Kinetics experiments were conducted to evaluate degradation efficiency under several different experimental conditions; initial persulfate concentration, ratio of persulfate and activator, type of iron activators (Fe(II) and zero-valent iron) and chelating agents (ethylenediaminetetraacetic acid (EDTA), citric acid and oxalic acid). Three radical scavengers, tert-butyl alcohol, iso-propyl alcohol, ethyl alcohol, were added to determine their particular impacts on the pharmaceuticals degradation rates.

Effect of iron activator types on the persulfate oxidation of pharmaceuticals (diclofenac, salicylic acid and ibuprofen)

255th National Meeting (2018)

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