The effect of varying ionic strength on the transport of naphthalene in a soil column

Conference · Wed Jan 01 00:00:00 EST 1992 · Geological Society of America, Abstracts with Programs; (United States)

OSTI ID:5601027

Ongley, L K ^[1]; Tomson, M B ^[2]

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1. Bates Coll., Lewiston, ME (United States). Geology Dept.
2. Rice Univ., Houston, TX (United States). Dept. of Environmental Science and Engineering

This study documents the effect of fluid ionic strength on the adsorption and desorption of naphthalene to a fine sandy soil using a miscible displacement apparatus. The partition coefficient, K[sub p], was predictable within an order of magnitude using the aqueous solubility of naphthalene and the organic carbon partition coefficient relation. log K[sub oc] = [minus]0.921 log X[sub s] [minus] 0.00953 (mp [minus] 25) [minus] 1.405 where X[sub s] is the mole fraction solubility of contaminant in water and mp is the contaminant's melting point in C and K[sub p] = f[sub oc] K[sub oc] where f[sub oc] is the weight fraction of organic carbon in the soil. However, the minimum found at 0.06M was not predicted. The fraction of equilibrium sites reached a maximum between 0.01M and 0.1M. The sorption rate constant, [alpha], a first-order kinetic parameter, snowed dramatic differences between the BTC and the FOUT curves. [alpha][sup BTC] decreased with increasing ionic strength while [alpha][sup FCUT] remained constant. The impact of ionic strength on naphthalene transport can be interpreted in terms of the alteration of the soil organic matter, collapse of the double layer and the dynamics of soil organic matter.

• OSTI ID: 5601027
• Report Number(s): CONF-921058-; CODEN: GAAPBC
• Journal Information: Geological Society of America, Abstracts with Programs; (United States), Vol. 24:7; Conference: 1992 annual meeting of the Geological Society of America (GSA), Cincinnati, OH (United States), 26-29 Oct 1992; ISSN 0016-7592
• Country of Publication: United States
• Language: English

Related Subjects

54 ENVIRONMENTAL SCIENCES
NAPHTHALENE
ENVIRONMENTAL TRANSPORT
ADSORPTION
DESORPTION
EQUATIONS
ORGANIC MATTER
SOIL CHEMISTRY
SOILS
SOLUBILITY
AROMATICS
CHEMISTRY
CONDENSED AROMATICS
HYDROCARBONS
MASS TRANSFER
MATTER
ORGANIC COMPOUNDS
SORPTION
540220* - Environment
Terrestrial- Chemicals Monitoring & Transport- (1990-)