Leachability study of chromium contaminated soils to assess the long-term effectiveness of a remediation technology

Dimitris Dermatas, Xiaoguang Meng

Research output: Contribution to journalConference articlepeer-review

1 Scopus citations

Abstract

The effectiveness of a lime-based treatment remediation technology in mobilizing Cr3+ is assessed by conducting Acid Neutralization Capacity (ANC) and Toxicity Characteristic Leaching Procedure (TCLP) experiments. However, another important factor controlling the immobilization of the trivalent chromium present in a solid waste form is the resulting hydraulic conductivity, as it governs the rate of migration of the leaching solution. In the present study, a flow-through leaching test was developed in order to concurrently evaluate the chromium release, ANC and hydraulic conductivity of the solid waste form prior to and following lime treatment. A compacted solid disc was placed in a flexible wall apparatus similar to a flexible-wall permeameter. Leaching solutions, such as acetic acid and distilled water, were passed through the specimen under constant hydraulic head conditions. The results of the present study serve as the basis for the development of a general protocol to be used for the design and the evaluation of the effectiveness of remediation technologies.

Original languageEnglish
Pages (from-to)449-462
Number of pages14
JournalGeotechnical Special Publication
Issue number46 /1
StatePublished - 1995
EventProceedings of the Specialty Conference on Geotechnical Practice in Waste Disposal. Part 1 (of 2) - New Orleans, LA, USA
Duration: 24 Feb 199526 Feb 1995

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