Hydraulic Behavior of Trichloroethylene (TCE) contaminated soil

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Chatrenour M.; HOMAEE M.; ASADI KAPOURCHAL S.; MAHMOODIAN SHOSHTARI M.

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Journal: Journal of Water and Soil Conservation Year:2019 | Volume:26 | Issue:3 Page(s): 207-220

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Title

Hydraulic Behavior of Trichloroethylene (TCE) contaminated soil

Author(s)

Chatrenour M. | HOMAEE M. | ASADI KAPOURCHAL S. | MAHMOODIAN SHOSHTARI M. | Issue Writer Certificate

Keywords

Chlorinated contaminationQ1

GroundwaterQ1

Retention curveQ2

Saturated hydraulic conductivityQ1

Abstract

Background and Objectives: The retention and hydraulic conductivity are important characteristics of porous media in relation to imposed contaminants. Retention curve and hydraulic conductivity are dependent on soil and fluid characteristics. When entering Groundwater, Chlorinated contaminants cause contamination due to the type of compounds. Thus preventing these materials to enter soil and water is crucial to avoid any contamination. In order to investigate the hydraulic behavior of Trichloroethylene in soil, the retention of Trichloroethylene and water were determined. Determining the Saturated hydraulic conductivity and estimating the unSaturated hydraulic conductivity by Mualem-van Genuchten, Mualem-Brooks-Corey and Mualem-Kosugimodels in the two-phase NAPL-air systems were other objectives of this study. Materials and Methods: In this study, the hydraulic behavior of both Trichloroethylene fluid and water were examined. In order to draw the water and Trichloroethylene Retention curves in silty loam soil texture, the hanging water column method was used. The constant head method was employed to determine the Saturated hydraulic conductivity. The soil retention parameters for Trichloroethylene and water were obtained based on van Genuchten, Brooks-Corey and Kosugi retention models, using the RETC program. The unSaturated hydraulic conductivity, for both fluids as a function of Matric potential was obtained based on Mualem-Brooks-Corey, Mualem-van Genuchten and Mualem-Kosugi models. The performances of these models were assessed by some statistics including ME, RMSE, EF, CD and CRM. Results: The obtained results indicated that in a certain amount of liquid phase, Trichloroethylene has lower retention and larger hydraulic conductivity compared to water in soil. According to lower surface tension and viscosity of Trichloroethylene compared to water, the Saturated hydraulic conductivity of Trichloroethylene and water were 136. 75 and 94. 50 cm/day, respectively. For water, the van Genuchten retention model demonstrated highest EF (0. 93) and lowest RMSE (0. 018) values compared to Trichloroethylene fluid. The other two models were also provided better efficiency for water than Trichloroethylene. In case of Trichloroethylene, the van Genuchten and Brooks-Corey models showed highest efficiency. Generally, the accuracy of all three models for Trichloroethylene was less than water. Conclusions: The validation results of hydraulic models shows that the van Genuchtenmodel provides better prediction for retention in soil compared to Kosugi and Brooks-Corey models in the two-phase air-water and air-Trichloroethylene systems. Finally, due to the higher hydraulic conductivity and less maintenance of Trichlorothene fluid than water, if entering the soil, it will move faster towards Groundwater and, if introduced into the aquifer, will cause contamination and change in water quality.

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APA: Copy

Chatrenour, M., HOMAEE, M., ASADI KAPOURCHAL, S., & MAHMOODIAN SHOSHTARI, M.. (2019). Hydraulic Behavior of Trichloroethylene (TCE) contaminated soil. JOURNAL OF WATER AND SOIL CONSERVATION (JOURNAL OF AGRICULTURAL SCIENCES AND NATURAL RESOURCES), 26(3 ), 207-220. SID. https://sid.ir/paper/156524/en

Vancouver: Copy

Chatrenour M., HOMAEE M., ASADI KAPOURCHAL S., MAHMOODIAN SHOSHTARI M.. Hydraulic Behavior of Trichloroethylene (TCE) contaminated soil. JOURNAL OF WATER AND SOIL CONSERVATION (JOURNAL OF AGRICULTURAL SCIENCES AND NATURAL RESOURCES)[Internet]. 2019;26(3 ):207-220. Available from: https://sid.ir/paper/156524/en

IEEE: Copy

M. Chatrenour, M. HOMAEE, S. ASADI KAPOURCHAL, and M. MAHMOODIAN SHOSHTARI, “Hydraulic Behavior of Trichloroethylene (TCE) contaminated soil,” JOURNAL OF WATER AND SOIL CONSERVATION (JOURNAL OF AGRICULTURAL SCIENCES AND NATURAL RESOURCES), vol. 26, no. 3 , pp. 207–220, 2019, [Online]. Available: https://sid.ir/paper/156524/en

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