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Combined thermal and zero‐valent iron In Situ soil mixing remediation technology
Author(s) -
La Mori Phillip,
Kirkland Elgin,
Faircloth Harlan,
Bogert Robert,
Kershner Mark
Publication year - 2010
Publication title -
remediation journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.762
H-Index - 27
eISSN - 1520-6831
pISSN - 1051-5658
DOI - 10.1002/rem.20237
Subject(s) - environmental remediation , mixing (physics) , zerovalent iron , contamination , thermal treatment , soil contamination , environmental science , waste management , groundwater , soil water , environmental chemistry , chemistry , environmental engineering , soil science , adsorption , geology , ecology , physics , geotechnical engineering , organic chemistry , quantum mechanics , engineering , biology
Thermal remediation of contaminated soils and groundwater by injection of hot air and steam using large‐diameter auger in situ soil mixing effectively remediates volatile and semivolatile organic compounds. This technology removes large amounts of contamination during the early treatment stages, but extended treatment times are needed to achieve high removal percentages. Combining thermal treatment with another technology that can be injected and mixed into the soil, and that continues to operate after removal of the drilling equipment, improves removal efficiency, and reduces cost. Using field‐determined pseudo first‐order removal rates, the cost of the combined remediation of chlorinated volatile organic compounds (CVOCs) by thermal treatment followed by reductive dechlorination by iron powder has been estimated as 57 percent of the cost of thermal treatment alone. This analysis was applied to a case‐study remediation of 48,455 cubic yards, which confirmed the cost estimate of the combined approach and showed over 99.8 percent removal of trichloroethene and other chlorinated VOCs. © 2010 Wiley Periodicals, Inc.