Electrokinetic Soil Flushing

  1. Cameselle, Claudio 1
  2. Gouveia, Susana 1
  3. Cabo, Adrián 1
  1. 1 BiotecnIA, Department of Chemical Engineering, University of Vigo, Vigo, Spain
Libro:
Environmental Pollution

ISSN: 1566-0745,  2215-1702

ISBN: 9783030681395,  9783030681401

Ano de publicación: 2021

Páxinas: 111-132

Tipo: Capítulo de libro

DOI: 10.1007/978-3-030-68140-1_6 GOOGLE SCHOLAR lock_openAcceso aberto editor

Resumo

Electrokinetic remediation of soils contaminated with organic contaminants has gained interest due to the large number of contaminated sites with harmful organics. The organic contaminants in soils include pesticides, hydrocarbons, halogenated organics, and other hydrophobic compounds used in industry and agriculture. There is not still a reliable technology for the effective removal of organics from soils. In this context, the electrokinetic technology has attracted the interest of researchers, companies, and governments as a practical technology for the remediation of soils contaminated with organic compounds. The direct application of the electrokinetic technology to a contaminated soil results in limited remediation because the organic contaminants are hydrophobic and remain adsorbed to the soil particles and organic matter. In order to improve the remediation results, various alternatives have been proposed. These alternatives include the use of co-solvents or solubilizing agents (surfactants, cyclodextrins) to enhance the solubility of the organics in the interstitial fluid. Electrokinetic remediation can also be coupled with other remediation technologies such as phytoremediation, biodegradation, and chemical oxidation/reduction. Those coupled technologies aim to degrade the organics in the soil. The aim of this chapter is to review and summarize the remediation of soils contaminated with organics by electrokinetic soil flushing. This chapter includes the different approaches for the removal of organic contaminants in soil and assesses the advantages and drawbacks of the different electrokinetic-based remediation technologies.

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