Removal of PCE/TCE from groundwater by peroxydisulfate activated with citric acid chelated ferrous iron at 13 °C

Škarohlíd, Radek; Honetschlägerová, Lenka; Martinec, Marek; Rošková, Zuzana

doi:10.1016/j.eti.2020.101004

Cited by 9 publications

(1 citation statement)

References 28 publications

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“…In addition, injected Fe 2+ is converted into Fe 3+ , which is insoluble at neutral pH . It may be possible to avoid precipitation by adding a chelated form of Fe(II) into the aquifer. , Nevertheless, chelating agents that are commonly used to prevent Fe(III) precipitation (e.g., citric acid, EDTA) are not Fe-specific and may complex with and mobilize other metals from the soil matrix . Other methods for S 2 O 8 2– activation also appear to be impractical under conditions relevant to ISCO.…”

Section: Peroxydisulfate Chemistrymentioning

confidence: 99%

From Theory to Practice: Leveraging Chemical Principles To Improve the Performance of Peroxydisulfate-Based In Situ Chemical Oxidation of Organic Contaminants

McGachy,

Sedlak

2023

Environ. Sci. Technol.

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In situ chemical oxidation (ISCO) using peroxydisulfate has become more popular in the remediation of soils and shallow groundwater contaminated with organic chemicals. Researchers have studied the chemistry of peroxydisulfate and the oxidative species produced upon its decomposition (i.e., sulfate radical and hydroxyl radical) for over five decades, describing reaction kinetics, mechanisms, and product formation in great detail. However, if this information is to be useful to practitioners seeking to optimize the use of peroxydisulfate in the remediation of hazardous waste sites, the relevant conditions of high oxidant concentrations and the presence of minerals and solutes that affect radical chain reactions must be considered. The objectives of this Review are to provide insights into the chemistry of peroxydisulfate-based ISCO that can enable more efficient operation of these systems and to identify research needed to improve understanding of system performance. By gaining a deeper understanding of the underlying chemistry of these complex systems, it may be possible to improve the design and operation of peroxydisulfate-based ISCO remediation systems.

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Section: Peroxydisulfate Chemistrymentioning

confidence: 99%