Authors: Hanley, H.J.M.; Payne, T.E.

Source: Canadian Journal of Civil Engineering, Volume 36, Number 3, March 2009 , pp. 559-563(5)

Publisher: NRC Research Press

Abstract:

Small angle neutron scattering (SANS) data are reported from a system that models the contamination of a clay - organic matter soil from a fuel spillage. The soil was represented as an aqueous dispersion of the synthetic clay mineral Laponite coated with lysine, and the contaminant was a representative jet fuel, quadricyclane, mixed with the detergent cetyltrimethylammonium bromide (CTAB). The adsorbed surface coverage on the clay was estimated. It is shown that the presence of adsorbed lysine considerably enhances the subsequent adsorption of both CTAB and quadricyclane. It is demonstrated that the SANS technique can contribute to the general problem of environmental remediation and retention by probing the interactions of pollutants and clay surfaces.

Cet article traite des données de la diffusion des neutrons sous faibles angles (SANS) provenant d'un système qui modélise la contamination d'un sol composé d'argile/matières organiques par un déversement de carburant. Le sol était représenté par une dispersion aqueuse du matériau argileux synthétique Laponite recouvert de lysine; le contaminant était un carburant d'aviation représentatif, le quadricyclane, mélangé au détergent bromure d'hexadécyltriméthylammonium (CTAB). La superficie d'adsorption de l'argile a été estimée. Il est démontré que la présence de lysine adsorbée a considérablement amélioré l'adsorption subséquente du CTAB et du quadricyclane. La technique SANS peut clairement contribuer à la question générale de restauration environnementale et de rétention en examinant les interactions des agents polluants et les surfaces de l'argile.

Document Type: Research article

Publication date: 2009-03-01

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• Published since 1974, this monthly publication is the official journal of the Canadian Society for Civil Engineering. It contains articles on environmental engineering, hydrotechnical engineering, structure engineering, construction engineering, engineering mechanics, and engineering materials, and a history of civil engineering. Contributors include recognized researchers and practitioners in industry, government, and academe. New developments in engineering design and construction are also featured.
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