Surface-Properties of Suspended-Solids in Stratified Estuaries (krka River Estuary and Rhone River Delta)

J. Biscan, I. Rhebergen, M. Juracic, Jm Martin and Jean-Marie Mouchel ()
Additional contact information
J. Biscan: CERGRENE - CERGRENE - ENGREF - Ecole Nationale du Génie Rural, des Eaux et des Forêts - ENPC - École nationale des ponts et chaussées
I. Rhebergen: CERGRENE - CERGRENE - ENGREF - Ecole Nationale du Génie Rural, des Eaux et des Forêts - ENPC - École nationale des ponts et chaussées
M. Juracic: CERGRENE - CERGRENE - ENGREF - Ecole Nationale du Génie Rural, des Eaux et des Forêts - ENPC - École nationale des ponts et chaussées
Jm Martin: CERGRENE - CERGRENE - ENGREF - Ecole Nationale du Génie Rural, des Eaux et des Forêts - ENPC - École nationale des ponts et chaussées
Jean-Marie Mouchel: CERGRENE - CERGRENE - ENGREF - Ecole Nationale du Génie Rural, des Eaux et des Forêts - ENPC - École nationale des ponts et chaussées

Post-Print from HAL

Abstract: Three surface parameters - specific surface area (SSA), heat of wetting (Hw), and cation exchange capacity (CEC) - of estuarine suspended solids were studied in relation to the organic matter (dissolved or particulate). Natural suspended solids were studied in two stratified river mouths - the Krka River estuary and the Rhone River delta. The same studies were performed with model solids, well defined by chemical composition and preparation (controlled pore glass, silanized controlled pore glass and calcite) after exposure to natural water samples from the Krka River estuary. On the basis of the studied parameters, the existence of two types of organic compounds that mediate the surface properties of particulates was indicated: (1) hydrophilic, with high density of functional groups, reactive and degradable, and coinciding with 'river type organic matter, and (2) hydrophobic, less reactive and thus more persistent, and coinciding prevalently with 'marine type organic matter'. Generally, it was found that high Hw values (100-300-mu-J cm-2) reflect the influence of surface functional groups that originate primarily from the reactive organics (adsorbed or particulate). An extreme value of Hw (523-mu-J cm-2) was found at a location of high biological productivity and high anthropogenic influence.

Date: 1991
References: Add references at CitEc
Citations:

Published in Marine Chemistry, 1991, 32 (41366), pp.235-252. ⟨10.1016/0304-4203(91)90041-t⟩

There are no downloads for this item, see the EconPapers FAQ for hints about obtaining it.

Related works:
This item may be available elsewhere in EconPapers: Search for items with the same title.

Export reference: BibTeX RIS (EndNote, ProCite, RefMan) HTML/Text

Persistent link: https://EconPapers.repec.org/RePEc:hal:journl:hal-00779886

DOI: 10.1016/0304-4203(91)90041-t

Access Statistics for this paper

More papers in Post-Print from HAL
Bibliographic data for series maintained by CCSD ().