Applying surrogates and indicators to assess removal efficiency of trace organic chemicals during chemical oxidation of wastewaters

Eric R.V. Dickenson, Jörg E. Drewes, David L. Sedlak, Eric C. Wert, Shane A. Snyder

Research output: Contribution to journalArticlepeer-review

89 Scopus citations

Abstract

To respond to concerns associated with wastewater-derived contaminants water utilities are looking for new approaches for monitoring trace organic chemicals in conventional and advanced water treatment processes. This study examines the use of a combination of surrogate parameters and indicator compounds tailored to monitor the removal efficiency of advanced oxidation processes employed by treatment plants engaged in indirect potable water reuse programs. Potential surrogate parameters and indicator compounds, identified by reviewing previous publications and classified by their structural properties, were tested in pilot- and full-scale treatment systems. Dilantin, DEET, meprobamate, and iopromide are good indicators to assess optimized oxidation conditions while ozonating tertiary-treated wastewaters. UVA reduction, ozone byproduct formation, such as simple organic acids, and ozone exposure correlated with "sweet spot" compounds, where ozone exposure correlated with trace organic removal across five tertiary-treated wastewaters. Findings indicate that the proposed framework can serve as a conservative monitoring approach for advanced oxidation processes as well as other indirect potable reuse processes to ensure proper removal of identifiedandunidentified wastewater-derived organic contaminants, to detect failures in system performance, and is protective of public health.

Original languageEnglish (US)
Pages (from-to)6242-6247
Number of pages6
JournalEnvironmental Science and Technology
Volume43
Issue number16
DOIs
StatePublished - Aug 15 2009
Externally publishedYes

ASJC Scopus subject areas

  • Chemistry(all)
  • Environmental Chemistry

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