Sorption kinetics of hydrophobic organic compounds to natural sediments and soils

Journal Article · Tue Jul 01 04:00:00 EDT 1986 · Environ. Sci. Technol.; (United States)

DOI:https://doi.org/10.1021/es00149a011· OSTI ID:5089075

Wu, S; Gschwend, P M

Sorption kinetics of hydrophobic organic chemicals to and from suspended sediment and soil particles is described by a radial diffusive penetration model modified by a retardation factor reflecting microscale partitioning of the sorbate between intraaggregate pore fluids and the solids making up the aggregate grains. In light of this and other sorption kinetics models, a closed-loop-stripping apparatus with a photoionization detector operating in-line was used to examine the effects of sorbate hydrophobicity, sorbent particle size, and system temperature on solid-solution exchange over times of seconds to days. The authors results indicate that a single effective diffusivity parameter, which is predictable from compound solution diffusivity, octanol-water partition coefficient, and sorbent organic content, density, and porosity, can be used to quantify the sorption kinetics.

• Research Organization: Massachusetts Institute of Technology, Cambridge (USA)
• OSTI ID: 5089075
• Journal Information: Environ. Sci. Technol.; (United States), Journal Name: Environ. Sci. Technol.; (United States) Vol. 20:7; ISSN ESTHA
• Country of Publication: United States
• Language: English

Related Subjects

520200* -- Environment
Aquatic-- Chemicals Monitoring & Transport-- (-1989)
54 ENVIRONMENTAL SCIENCES
ENVIRONMENTAL TRANSPORT
KINETICS
MASS TRANSFER
MATHEMATICAL MODELS
ORGANIC COMPOUNDS
PARTICLE SIZE
PARTICLES
PARTICULATES
SEDIMENTS
SIZE
SORPTION