In Situ Chemical Oxidation: Technology Description and Status

Siegrist, Robert L.; Crimi, Michelle; Brown, Richard A.

doi:10.1007/978-1-4419-7826-4_1

Cited by 35 publications

(56 citation statements)

References 63 publications

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“…Some interactions with the soil and groundwater can be productive with formation of free radicals that increase the rate of oxidation, while other reactions are non-productive, being possible to mention the consumption of the oxidant by species that are not targets of the remediation project. Several studies support evidences that the natural presence of metal oxides in soil promotes ozone catalysis [2]. The main proposals of this study were detecting and quantifying metal ions of interest that are mobilized from the solid matrix by the ozone injection process, studying mechanisms of ionic mobilization resulting from ozone remediation and to determine the ionic concentrations increase in groundwater.…”

Section: Introductionmentioning

confidence: 90%

Ozone Injection in Soil Contaminated with Organic Compounds and Ions of Interest Evaluation

Gardinali¹,

Hypólito²,

Sumi³

2017

Proceedings of the 2nd World Congress on New Technologies

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-In this study, field activities was carried out to collect soil and groundwater samples followed by laboratory work aiming at the hydro geochemical characterization of the unconfined aquifer. Studies led to experimental laboratory activities involving ozone injection through soil columns to detect and quantify the metal ions of interest that are mobilized from the solid matrix. Based on the study of the ion mobilization mechanisms resulting from remediation with ozone, it was possible to determine the ionic concentrations increase in groundwater. Experiment results confirmed that ozone injection in subsurface released pollutant ions such as Al 3+ and Fe 3+affecting drinking water local standards. Other pollutant metallic ions of interest such as Cr 2+, Ni 2+ and Pb 2+ didn't demand ozone and were not mobilized because they were found as part of the crystalline structure, not being adsorbed on the surface of the grain and also not having been detected in the interstitial solution.

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Section: Introductionmentioning

confidence: 90%

Ozone Injection in Soil Contaminated with Organic Compounds and Ions of Interest Evaluation

Gardinali¹,

Hypólito²,

Sumi³

2017

Proceedings of the 2nd World Congress on New Technologies

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“…■ ASSOCIATED CONTENT * S Supporting Information XRD and TGA mineral data, SO 4 2− concentrations (mg L −1 ) in monitoring wells throughout the experimental period, Ca 2+ concentration (mg L −1 ) in monitoring wells throughout the experiment, layout of contaminated railway terrain, cross sections of pilot location from T1 to T3 and T2 to T4, relationship between DOC and nitrogen species NH 4+ and NO 3− , changes in SOM as measured by TGA analysis, online sequential extraction comparison of sulfur and copper, lead, and zinc in samples taken prior to injection, following the first persulfate application and at the end of the field experiment. This material is available free of charge via the Internet at http://pubs.acs.org.…”

Section: Contaminant and Organic Carbon Mobilizationmentioning

confidence: 99%

Geochemical and Microbiological Characteristics during in Situ Chemical Oxidation and in Situ Bioremediation at a Diesel Contaminated Site

Sutton¹,

Kalisz²,

Krupanek³

et al. 2014

Environ. Sci. Technol.

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While in situ chemical oxidation with persulfate has seen wide commercial application, investigations into the impacts on groundwater characteristics, microbial communities and soil structure are limited. To better understand the interactions of persulfate with the subsurface and to determine the compatibility with further bioremediation, a pilot scale treatment at a diesel-contaminated location was performed consisting of two persulfate injection events followed by a single nutrient amendment. Groundwater parameters measured throughout the 225 day experiment showed a significant decrease in pH and an increase in dissolved diesel and organic carbon within the treatment area. Molecular analysis of the microbial community size (16S rRNA gene) and alkane degradation capacity (alkB gene) by qPCR indicated a significant, yet temporary impact; while gene copy numbers initially decreased 1-2 orders of magnitude, they returned to baseline levels within 3 months of the first injection for both targets. Analysis of soil samples with sequential extraction showed irreversible oxidation of metal sulfides, thereby changing subsurface mineralogy and potentially mobilizing Fe, Cu, Pb, and Zn. Together, these results give insight into persulfate application in terms of risks and effective coupling with bioremediation.

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“…Peroxydisulphate (PDS) is a strong oxidant used with success for the disintegration of WAS by several authors [20,[87][88][89][90]. In order to form sulphate and hydroxyl radicals, persulphates need to be activated, usually by heat [91], metal [92], UV [93] and alkaline conditions [94] among others [95].…”

Section: Chemicalmentioning

confidence: 99%

Disintegration of Wastewater Activated Sludge (WAS) for Improved Biogas Production: A Mini Review

Grűbel¹,

Silvestri²,

Vv³

et al. 2018

Preprint

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Due to rapid urbanization, the quantity of wastewater treatment plants (WWTP) has increased, and with it the amount of waste generated by them. Sustainable management of this waste can lead to the creation of energy-rich biogas through the fermentation process. This review presents recent advances in the anaerobic digestion process resulting in greater biogas production. Disintegration techniques for enhancing waste activated sludge fermentation can be generally partitioned into biological, physical and chemical, each of which are covered in this review. These disintegration techniques were compared mainly in terms of their biogas yield. It was found that ultrasonic and microwave disintegration provides the highest biogas yield (>500%); however, they are also the most energy demanding (>10,000 kJ kg-1 total solids).

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In Situ Chemical Oxidation: Technology Description and Status

Cited by 35 publications

References 63 publications

Ozone Injection in Soil Contaminated with Organic Compounds and Ions of Interest Evaluation

Ozone Injection in Soil Contaminated with Organic Compounds and Ions of Interest Evaluation

Geochemical and Microbiological Characteristics during in Situ Chemical Oxidation and in Situ Bioremediation at a Diesel Contaminated Site

Disintegration of Wastewater Activated Sludge (WAS) for Improved Biogas Production: A Mini Review

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