Mineralization of a fully halogenated organic compound by persulfate under conditions relevant to in situ reduction and oxidation: Reduction of hexachloroethane by ethanol addition followed by oxidation

Fully halogenated compounds are difficult to remediate by in situ chemical oxidation (ISCO) because carbon–halogen bonds react very slowly with the species that typically initiate contaminant transformation: sulfate radical (SO4•–) and hydroxyl radical (•OH). To enable the remediation of this class of contaminants by persulfate (S2O82–)-based ISCO, we employed a two-phase process to dehalogenate and oxidize a representative halogenated compound (i.e., hexachloroethane). In the first phase, a relatively high concentration of ethanol (1.8 M) was added, along with concentrations of S2O82– that are typically used for ISCO (i.e., 450 mM). Hexachloroethane underwent rapid dehalogenation when carbon-centered radicals produced by the reaction of ethanol and radicals formed during S2O82– decomposition reacted with carbon–halogen bonds. Unlike conventional ISCO treatment, hexachloroethane transformation and S2O82– decomposition took place on the time scale of days without external ..., , # Mineralization of a fully halogenated organic compound by persulfate under conditions relevant to in situ reduction and oxidation: Reduction of hexachloroethane by ethanol addition followed by oxidation

Dataset DOI: [10.5061/dryad.wdbrv160s](10.5061/dryad.wdbrv160s)

## Description of the data and file structure

### Files and variables

#### File: EST\_Tae\_CCR\_Rawdata.xlsx

#### **Variables – Figure 1–4 Dataset Description**

This dataset contains raw and processed GC/MS and ancillary analytical data used to generate **Figures 1 through 4** in the manuscript titled *“Mineralization of a Fully Halogenated Organic Compound by Persulfate under Conditions Relevant to in Situ Reduction and Oxidation*.”

**Figure 1: Temperature-Dependent Hexachloroethane Reduction**

The “Figure 1” sheet presents data on the transformation of hexachloroethane and concurrent persulfate decomposition under different temperatures (2, 30, and 50 °C) relevant to ISCO conditions.

* **Columns A–I**: GC/MS raw...,