In-situ chemical oxidation (ISCO) has been used several oxidants such as hydrogen peroxide, permanganate, persulfate and ozone. Persulfate has been focused on recently due to its several advantages.  Persulfate can be activated through reduction reactions which lead to a heterogeneous cleavage including a sulfate radical and sulfate anion.  Ferrous iron is known as an activator for persulfate.  A few studies showed that zero-valent iron also can activate persulfate with higher activation efficiencies.  Zero-valent zinc (ZVZ) has been applied for the activation of persulfate.  ZVZ has higher reduction potential than that of ZVI and this might work on the activation efficiency. ZVZ powder was mixed with persulfate and a target contaminant was added.  The activation of persulfate was identified with the degradation of target probes. Degradation rate of the target dramatically increased with the addition of ZVZ indicating zinc also activate persulfate.  The degradation rate was dependent on the solution pH.

Activation of persulfate using zerovalent zinc

248th National Meeting (2014)

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