Activated persulfate oxidation as a first step in a treatment train

Aikaterini Tsitonaki, Hans Mosbæk, Poul Løgstrup Bjerg

Research output: Chapter in Book/Report/Conference proceedingArticle in proceedingsResearchpeer-review

Abstract

In-situ chemical oxidation has been applied in several cases for the
remediation of contaminated sites. Activated persulfate is an innovative oxidant that constitutes an alternative to the most commonly used oxidants such as permanganate, ozone and Fenton’s reagent. In this work, we investigated the efficiency of activated persulfate oxidation against MTBE, Trichloroethylene (TCE) and 1,1,1-Trichloroethane (TCA) in both aqueous and soil-water systems using heat and ferrous ion as activators. Heat-activated persulfate oxidation at 40oC was the most effective method and achieved 98.6% removal of MTBE, and 89.9% of TCE in the soil-water systems within 24 hours. Considerable TCA removal was only observed in the aqueous systems. Iron-activated persulfate was very effective in the first hours but its efficiency was thereafter limited. Further experiments with MTBE and the use of complexing agents for improving/controlling iron availability did not increase the efficiency. In conclusion, the use of heat-activated persulfate seems most promising, and in addition, the increased aquifer temperatures may be beneficial to subsequent microbial degradation processes.
Original languageEnglish
Title of host publicationRemediation of Chlorinated and Recalcitrant Compounds : the 5th International Conference, Monterey, May 22-25, 2006.Proceedings
VolumeCD-ROM
Place of PublicationColumbus, OH
PublisherBattelle Memorial Institute
Publication date2006
ChapterPaper D-77
Publication statusPublished - 2006
Event5th International Conference on Remediation of Chlorinated and Recalcitrant Compounds - Monterey, United States
Duration: 22 May 200625 Jun 2006
Conference number: 5

Conference

Conference5th International Conference on Remediation of Chlorinated and Recalcitrant Compounds
Number5
CountryUnited States
CityMonterey
Period22/05/200625/06/2006

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