Design, Fabrication, and Assembly of an Apparatus for Electrokinetic Remediation Studies

Abstract

This paper presents the design, fabrication, and assembly of a new geo-environmental engineering apparatus specifically made to experimentally evaluate the viability, feasibility, practicality, and economics of electrokinetic extraction of conservative and reactive contaminants from fine-grained soils and to develop a better understanding of the various complex transport processes, electrochemical reactions, and physicochemical soil-contaminant interactions during the process. The design criteria and details of each component of the new apparatus are presented. The distinct advantages of the apparatus developed are discussed. Typical experimental results obtained by the apparatus are presented to demonstrate its simplicity of operation and versatility of measuring various parameters at different spatial and temporal intervals.

Metal Removal

“…Electro-osmosis, which allows transportation of water, and electromigration, assures mobility of heavy metals, constitute the two principal forces responsible for extraction of contaminants by this technology (Acar et al 1990;Ribeiro and Mexia 1997;Yeung 1994). Several electrochemical reactions between contaminants and soils such as electrolysis, adsorption and desorption of contaminants on clay particles, acidification of soil by transportation of }f ions and precipitation of inorganic species occur simultaneously (Acar and Alshawabkeh 1993;Rosand and Acar 1996;Yeung et al 1997). …”

Remediação Eletrocinética - Novas Técnicas

“…Também foram testados vários tipos de células, entre as quais se escolheu as de plástico transparente com forma cilíndrica inspirados nas experiências realizadas por outros pesquisadores (Yeung et al, 1997), entretanto com modificações. A dimensão da célula utilizada possui 18,50 cm de comprimento e 6,50 cm de diâmetro (Figura 2).…”