2011 | OriginalPaper | Buchkapitel
1. In Situ Chemical Oxidation: Technology Description and Status
verfasst von : Robert L. Siegrist, Michelle Crimi, Richard A. Brown
Erschienen in: In Situ Chemical Oxidation for Groundwater Remediation
Verlag: Springer New York
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Scope
Key Concepts
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ISCO has had a long history of development and use. While research and development still continue, ISCO is a relatively mature technology for the remediation of contaminated groundwater, including source zones and plumes.
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ISCO has primarily been applied for treatment of chlorinated organic solvents and petroleum hydrocarbons to achieve remediation objectives ranging from reducing contaminant mass in a source zone to achieving maximum contaminant levels in a plume. To achieve the more stringent remediation objectives, ISCO is almost always combined with another technology (e.g., bioremediation) or approach (e.g., monitored natural attenuation).
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The effectiveness of ISCO varies and is highly dependent on proper site characterization and design of the oxidant delivery system to achieve oxidative destruction of contaminants of concern in a target treatment zone.
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Typically ISCO applications require a targeted second or third oxidant delivery event since rebound in groundwater contaminant levels following cessation of active ISCO is a common occurrence.
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The median cost of an ISCO project appears to be on the order of $100 per cubic yard treated. However, costs can vary widely depending on contaminant characteristics, site conditions, and the oxidant used.
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When considering ISCO at a contaminated site, there are a number of frequently asked questions (Table 1.6) and key points to keep in mind to help support successful application (Table 1.7).