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Title:Photolytic ozonation for protection and rehabilitation of ground-water resources; a mechanistic study
Author(s):Peyton, Gary R.; Smith, Michelle A.; Peyton, Brent M.
Contributor(s):Illinois State Water Survey
Subject(s):Groundwater
Aquifers
Water resource development
Water resource development--Illinois
Ozone
Photolysis
Ozonation
Hydrogen peroxide
Oxidation
Hydroxyl radical
Water treatment
Abstract:The cleanup of ground-water resources which have been contaminated by anthropogenic organic compounds is difficult and expensive. Furthermore, most treatment methods merely transfer the contaminant to another phase, such as an adsorbant or the atmosphere. A treatment process which produces harmless by-products, could be set up on-site, and does not require the transport of hazardous materials is very desirable for such cleanup operations. Photolyticozonation, the combination of ozone treatment and ultraviolet irradiation, is an oxidative water treatment process which is capable of convert ing virtually any organic pollutant completely to carbon dioxide and water. Thus, it is potentially a very "clean" solution to many contamination problems. There has, however, been disagreement in the scientific literature concerning the effectiveness of the process, due largely to a lack of understanding of the chemistry which is involved. In this project, photolytic ozonation was studied at the laboratory scale, to better understand and, if possible, model the complex chemical reaction mechanism, so that the process can be more easily optimized from an economic stand point. It was shown that hydroxyl radical, the active species responsible for the destruction of organic pollutants, is not generated directly by ozone photolysisas has generally been speculated, but is produced by secondary reactions. A model has been developed which explains the behavior of the process under a variety of conditions and is useful for the prediction of process performance. The model includes parameters, the values of which may be inferred from the chemical structure of the organic pollutant. The reaction system is seen to be "versatile" in that it has alternate pathways by which pollutant destruction may proceed, depending on conditions in the water being treated.
Issue Date:1987-01-01
Publisher:University of Illinois at Urbana-Champaign. Water Resources Center
Genre:Report (Grant or Annual)
Type:Text
Language:English
URI:http://hdl.handle.net/2142/91621
Sponsor:U.S. Department of the Interior
U.S. Geological Survey
Rights Information:Copyright Gary R. Peyton, Michelle A. Smith, Brent M. Peyton
Date Available in IDEALS:2016-09-28


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