Title

Nanoscale And Microscale Iron Emulsions For Treating Dnapl

Abstract

Chlorinated solvents in groundwater are most commonly addressed using pump and treat technology. Due to the slow dissolution of solvents from residual or pooled dense non-aqueous phase liquid (DNAPL) sources, pump and treat primarily provides containment, rather than remediation. An innovative technique that can be applied to DNAPL pools located under existing, occupied facilities, and the feasibility of using emulsified nanoscale iron particles to enhance dehalogenation of DNAPL free-phase were presented. The emulsified system consisted of a surfactant stabilized oil-in-water emulsion with the nanoscale iron particles contained within the emulsion particles. DNAPL, e.g., trichloroethylene (TCE), diffused through the oil membrane of the emulsion particle whereupon they reach the surface of an iron particle where dehalogenation takes place. More than 200 different emulsions were evaluated for TCE degradation efficiency. None of the emulsions yielded concentrations of chlorinated byproducts in solution above the detection limit. The only product that could be measured was ethylene and some small concentrations of other hydrocarbons. Ethylene exited through the micelle wall where it then entered free phase water and the gaseous headspace.

Publication Date

12-1-2001

Publication Title

ACS National Meeting Book of Abstracts

Volume

41

Issue

1

Number of Pages

1028-1033

Document Type

Article; Proceedings Paper

Personal Identifier

scopus

Socpus ID

0346461613 (Scopus)

Source API URL

https://api.elsevier.com/content/abstract/scopus_id/0346461613

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