Scale-up on electrokinetic remediation: Engineering and technological parameters

JOURNAL OF HAZARDOUS MATERIALS

卷:315

Article

Lopez-Vizcaino, Ruben¹  Navarro, Vicente²  Leon, Maria J.²  Risco, Carolina¹  Rodrigo, Manuel A.³  Saez, Cristina³  Canizares, Pablo³ 

[1] Univ Castilla La Mancha, Dept Chem Engn, Inst Chem & Environm Technol, Campus Univ S-N, E-13071 Ciudad Real, Spain

[2] Univ Castilla La Mancha, Sch Civil Engn, Geoenvironm Grp, Avda Camilo Jose Cela S-N, E-13071 Ciudad Real, Spain

[3] Univ Castilla La Mancha, Dept Chem Engn, Fac Chem Sci & Technol, Campus Univ S-N, E-13071 Ciudad Real, Spain

关键词: Natural soil;    Scale-Up;    Electrokinetic remediation;    2,4-D;    Herbicide;   

DOI  :  10.1016/j.jhazmat.2016.05.012

来源: Elsevier

【 摘 要 】

This study analyses the effect of the scale-up of electrokinetic remediation (EKR) processes in natural soils. A procedure is proposed to prepare soils based on a compacting process to obtaining soils with similar moisture content and density to those found in real soils in the field. The soil used here was from a region with a high agrarian activity (Mora, Spain). The scale-up study was performed in two installations at different scales: a mock-up pilot scale (0.175 m(3)) and a prototype with a scale that was very similar to a real application (16 m(3)). The electrode configuration selected consisted of rows of graphite electrodes facing each other located in electrolyte wells. The discharge of 20 mg of 2,4-dichlorophenoxyacetic acid [2,4-D] per kg of dry soil was treated by applying an electric potential gradient of 1 V cm(-1). An increase in scale was observed to directly influence the amount of energy supplied to the soil being treated. As a result, electroosmotic and electromigration flows and electric heating are more intense than in smaller scale tests (24%, 1% and 25%, respectively respect to the values in prototype). In addition, possible leaks were evaluated by conducting a watertightness test and, quantifying evaporation losses. (C) 2016 Elsevier B.V. All rights reserved.

【 授权许可】

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