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Title

Factors controlling the stability of submicron colloids in natural waters
Authors
Filella, Montserrat
Buffle, Jacques
Published in Colloids and Surfaces. A, Physicochemical and Engineering Aspects. 1993, vol. 73, p. 255-273
Abstract Particles are ubiquitous in all natural systems and play an important role in the control and fate of nutrients and pollutants. Submicron particles are especially important because they have large specific surface areas and high surface free energies which facilitate sorption of significant quantities of substances. Currently, only limited information is available on particle number and size distributions of natural submicron particles, owing to the significant problems involved in their experimental determination. In the present paper, existing data are discussed and compared with theoretical predictions based on a classical coagulation/sedimentation model where the kinetics of coagulation is described by Smoluchowski's equations and sedimentation is characterized by Stokes' law. Model predictions agree well with reported particle behaviour for particles larger than 100 nm. While classical theory does not explain the presence of colloids smaller than 100 nm in surface waters, the existence of such small colloids, embedded in large organic matrices, has been observed recently by high resolution transmission electron microscopy. Improvements in the measurement techniques available as well as development of the necessary theory to describe these organic/inorganic associations would be most welcome.
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Article (Published version) (1.6 MB) - document accessible for UNIGE members only Limited access to UNIGE
Other version: http://linkinghub.elsevier.com/retrieve/pii/092777579380020F
Structures
Faculté des sciences / Section des sciences de la Terre et de l'Environnement / Département F.-A. Forel des sciences de l'environnement et de l'eau
Faculté des sciences / Section de chimie et biochimie / Département de chimie minérale, analytique et appliquée
Research group Limnology and Environmental Geology
Citation
(ISO format) 		FILELLA, Montserrat, BUFFLE, Jacques. Factors controlling the stability of submicron colloids in natural waters. In: Colloids and Surfaces. A, Physicochemical and Engineering Aspects, 1993, vol. 73, p. 255-273. https://archive-ouverte.unige.ch/unige:101389

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Deposited on : 2018-01-16

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