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http://dx.doi.org/10.7857/JSGE.2016.21.6.192

Investigation of Seasonal Characteristics of Contaminants and Hydrochemical Factors in an Aquifer for Application of In Situ Reactive Zone Technology  

Ahn, Jun-Young (Department of Civil & Environmental Engineering, Pusan National University)
Kim, Cheolyong (Department of Civil & Environmental Engineering, Pusan National University)
Kim, Tae Yoo (Department of Civil & Environmental Engineering, Pusan National University)
Jun, Seong-Chun (GeoGreen21 Co., Ltd.)
Hwang, Inseong (Department of Civil & Environmental Engineering, Pusan National University)
Publication Information
Journal of Soil and Groundwater Environment / v.21, no.6, 2016 , pp. 192-203 More about this Journal
Abstract
A field investigation was conducted on an aquifer contaminated with trichloroethylene (TCE) for application of in situ reactive zone treatment using nanosized zero-valent iron (NZVI). The aquifer was an unconfined aquifer with a mean hydraulic conductivity of $5.14{\times}10^{-4}cm/sec$, which would be favorable for NZVI injection. Seasonal monitoring of TCE concentration revealed a presence of non-aqueous phase liquid form of TCE near IW (injection well). The hydrochemical data characterized the site groundwater to be a $Ca-HCO_3$ type. The average value of Langelier Saturation Index of the groundwater was -1.33, which implied that the site was favorable for corrosion of NZVI. Dissolved oxygen (DO) concentration varied between 2.5~11.5 mg/L, which indicated that DO would greatly compete with TCE as an electron acceptor. The hydrogeological and hydrochemical characterization reveals that the time around November would be appropriate for NZVI injection when water level and temperature are relatively high and DO concentration is low.
Keywords
Nanoscale zero-valent iron; field study; DNAPL; Trichloroethylene; Contaminant distribution;
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Times Cited By KSCI : 5  (Citation Analysis)
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