articleEnvironmental Science & TechnologyJul 16, 2010Closed access

Mechanism of Base Activation of Persulfate

OFOlha FurmanALAmy L. TeelRJRichard J. Watts

Washington State University

PubMed
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Abstract

Base is the most commonly used activator of persulfate for the treatment of contaminated groundwater by in situ chemical oxidation (ISCO). A mechanism for the base activation of persulfate is proposed involving the base-catalyzed hydrolysis of persulfate to hydroperoxide anion and sulfate followed by the reduction of another persulfate molecule by hydroperoxide. Reduction by hydroperoxide decomposes persulfate into sulfate radical and sulfate anion, and hydroperoxide is oxidized to superoxide. The base-catalyzed hydrolysis of persulfate was supported by kinetic analyses of persulfate decomposition at various base:persulfate molar ratios and an increased rate of persulfate decomposition in D(2)O vs H(2)O.…

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Topics & keywords

Topics
Keywords
  • Persulfate
  • Chemistry
  • Hydroxyl radical
  • Base (topology)
  • Inorganic chemistry
  • Photochemistry
  • Decomposition
  • Sulfate
UN Sustainable Development Goals
  • Clean water and sanitation
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