Combined Application of Ozone and Hydrogen Peroxide to Degrade Diesel Contaminants in Soil and Groundwater

Wen-Yu Chen; Prakash Pokhrel; Ying-Shun Wang; Sheng-Lung Lin; Min-Hsin Liu

doi:10.3390/w13233404

Water (Dec 2021)

Combined Application of Ozone and Hydrogen Peroxide to Degrade Diesel Contaminants in Soil and Groundwater

Wen-Yu Chen,
Prakash Pokhrel,
Ying-Shun Wang,
Sheng-Lung Lin,
Min-Hsin Liu

Affiliations

Wen-Yu Chen: Department of Applied Chemistry, College of Science and Engineering, Chaoyang University of Technology, Taichung 413310, Taiwan
Prakash Pokhrel: Department of Applied Chemistry, College of Science and Engineering, Chaoyang University of Technology, Taichung 413310, Taiwan
Ying-Shun Wang: Department of Environmental Engineering and Management, College of Science and Engineering, Chaoyang University of Technology, Taichung 413310, Taiwan
Sheng-Lung Lin: Department of Environmental Engineering and Management, College of Science and Engineering, Chaoyang University of Technology, Taichung 413310, Taiwan
Min-Hsin Liu: Department of Environmental Engineering and Management, College of Science and Engineering, Chaoyang University of Technology, Taichung 413310, Taiwan

DOI: https://doi.org/10.3390/w13233404
Journal volume & issue: Vol. 13, no. 23
p. 3404

Abstract

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Environmental pollution has been a major concern in recent times, and soil and groundwater pollution are areas which have received particular focus. This has led to the development of various remediation techniques such as excavation, soil vapor extraction, bioremediation, chemical oxidation, and so on. Among all remediation techniques, chemical oxidation has been proven to be the most effective and feasible technique around the world. In this study, various combinations of ozone and hydrogen peroxide were used to treat diesel-contaminated soil and groundwater in an experimental setup. Experimental soil and groundwater were prepared with properties similar to the contaminated soil. An ozone generator and a pump injection system were deployed for combining ozone and hydrogen peroxide. Five different experiment batches were prepared based on the hydrogen peroxide concentration and its ratio to the soil. The diesel concentration in the water dropped from 300 mg/L to 7 mg/L in the first hour of treatment, which dropped below the detection limit (0.01 mg/L) thereafter. Similarly, 63.9% degradation was achieved with the combined sparging of ozone and hydrogen peroxide in the soil. Ozone combined with 7% hydrogen peroxide was the most promising combination for removing the contaminants. In addition, this research explored the hydroxyl radical conversion rate of ozone and the perozone, the difference in order of magnitude is greater than one which shows that the perozone has better oxidation capacity than ozone only. The findings of this study show that combining ozone with hydrogen peroxide is a competent and feasible onsite remediation method for diesel contaminants in soil and groundwater. Thus, this method can be applied in local gas stations, accidental spillage sites, and small-scale refineries for onsite treatment in a cost-effective and technically sound way within a short time span.

Published in Water

ISSN: 2073-4441 (Online)
Publisher: MDPI AG
Country of publisher: Switzerland
LCC subjects: Technology: Hydraulic engineering; Technology: Environmental technology. Sanitary engineering: Water supply for domestic and industrial purposes
Website: http://www.mdpi.com/journal/water/

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