The Lasagna Technology for In Situ Soil Remediation. 2. Large Field Test

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• 作者：Sa V. Ho ; Christopher Athmer ; P. Wayne Sheridan ; B. Mason Hughes ; Robert Orth ; David McKenzie ; Philip H. Brodsky ; Andrew M. Shapiro ; Timothy M. Sivavec ; Joseph Salvo ; Dale Schultz ; Richard Landis ; Ron
• 刊名：Environmental Science & Technology
• 出版年：1999
• 出版时间：April 1, 1999
• 年：1999
• 卷：33
• 期：7
• 页码：1092 - 1099
• 全文大小：167K
• 年卷期：v.33,no.7(April 1, 1999)
• ISSN：1520-5851

文摘

A full-scale field test of the Lasagna process wasconducted at a Department of Energy trichloroethylene-contaminated clay site in Paducah, Kentucky. The test coveredan area 21 ft × 30 ft (6.4 m × 9.2 m) and reached 45 ft(13.7 m) deep. A modified sheet piling method was utilizedfor installing electrodes and treatment zones in thinlayers through stiff clay soil without generating solid waste.Iron filings were used in the treatment zones for in situTCE degradation. Complications encountered during the testincluded contamination at significantly higher levels thananticipated and complex hydrogeology in the subsurface.Treatment effectiveness seems to vary with location, butin the contaminated areas bracketed by treatment zones,TCE removal ranged from 95% to over 99%. There arestrong indications that some of the TCE was transportedand degraded in the DNAPL form, which has significantimplications. On the basis of the field results, treatment costfor a typical one-acre site with contamination from 15 to45 ft deep ranges from about $45 to $80/yd³. Implemented inits full configuration for the first time at a real site, theLasagna process has demonstrated its robustness and cost-effectiveness in cleaning up TCE-contaminated soil inplace.