Remediation of A Clay Soil Contaminated With Dimethyl Phthalate By ‎Using Electrokinetic Method

مهندسی عمران فردوسی

Volume 36, Issue 1 - Serial Number 41, April 2023, Pages 69-84   

Document Type: Original Article

DOI: 10.22067/jfcei.2023.79475.1188

Authors

Ali Raeesi Estabragh^{* 1}; Hesam Fathali²; Keramatoallah Rezaee tireh shabankareh³; Hoorfar Abdolhossein⁴

¹Geotechnical Engineering, Irrigation and Reclamation Department, University of Tehran.

²Hydraulic Structures, Irrigation and Reclamation Department, Tehran University,karaj. Iran

³, Department of Food Industry, Faculty of Engineering and Technology, University of Tehran, Karaj, Iran

⁴Department of Irrigation and Development, Faculty of Engineering and Technology, University of Tehran, Karaj, Iran.

Abstract

In this research work, the remediation of a clay soil contaminated with dimethyl phthalate ‎was ‎studied by using electrokinetic method. Contaminated soil was made with the ratio ‎of 0.04 mg/g. ‎Non-ionic (Tween 80) surfactant and solution of 0.1 M NaOH were ‎used as anolyte. A reference ‎test was also considered with distilled water as ‎anolyte and catholyte. pH and EC and volume of ‎flow out fluid were measured ‎during the tests in both electrode reservoirs. At the end of each test ‎the shear ‎strength, pH, EC and degree of remediation of soil was measured at different ‎distance ‎from anode. The removal of contaminated was measure by a GC (Gas ‎Chromatography) apparatus. ‎The results showed that the amount of flow out fluid ‎for NaOH was nearly 20% more than the ‎solution of Tween 80 and distilled water. The ‎results also indicated that the strength of soil for ‎different solution is increased ‎by increasing the distance from anode. The value of it around the ‎cathode for ‎solution of NaOH was 14 kPa that was about 50 and 57% more than the distilled ‎water ‎and Tween 80. It was found that the degree of remediation at cathode is less than ‎anode. The ‎percentage of remediation for Tween 80 solution around the anode and ‎cathode were 53.88 and ‎‎16.5% respectively but for NaOH they changed to 50.82 and ‎‎23.26 near anode and cathode ‎reservoir. It was resulted that the effectiveness of NaOH ‎solution in remediation of soil was more ‎than the other used solutions.

Keywords

Electrokinetic; Clay soil; Dimethyl phthalate; Remediation

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