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Title: Effect of air sparging on fate and transport of trichloroethylene in chambers with alfalfa plants

To study the effect of air sparging in soil with trichloroethylene present as a dense nonaqueous phase, air was supplied through pipes installed at the bottom of two chambers planted with alfalfa. Air input rate was 2.14 L/m{sup 2}/day. The fate of trichloroethylene (TCE) was investigated by monitoring TCE concentration in both outflow groundwater and soil gas. Comparison of these results with those of the previous study without air sparging indicates that air sparging appreciably increases the groundwater concentration of TCE. The soil gas at the surface shows even greater concentration difference. The flux of TCE to the atmosphere is increased significantly by air input. Accordingly, the authors can conclude that air sparging improved mass transfer of TCE from the nonaqueous phase to groundwater phase. Air sparging appeared to negatively impact the health of the alfalfa because of the elevated TCE present in the vadose zone of the chamber.
Authors:
; ; ;  [1]
  1. Kansas State Univ., Manhattan, KS (United States)
Publication Date:
OSTI Identifier:
585804
Report Number(s):
CONF-9705104--
Journal ID: ISSN 1054-8564; TRN: IM9810%%39
Resource Type:
Conference
Resource Relation:
Conference: 12. Annual conference on hazardous waste remediation, Kansas City, MO (United States), 20-22 May 1997; Other Information: PBD: 1997; Related Information: Is Part Of Proceedings of the 12. annual conference on hazardous waste research. Building partnerships for innovative technologies; Erickson, L.E.; Rankin, M.M.; Grant, S.C.; McDonald, J.P. [eds.]; PB: 586 p.
Publisher:
Kansas State Univ., Manhattan, KS (United States)
Sponsoring Org:
Environmental Protection Agency, Washington, DC (United States)
Country of Publication:
United States
Language:
English
Subject:
54 ENVIRONMENTAL SCIENCES; CHLORINATED ALIPHATIC HYDROCARBONS; SOILS; ALFALFA; ENVIRONMENTAL TRANSPORT; EXPOSURE CHAMBERS; GROUND WATER