Accession Number : ADA289451

Title :   Mass Transfer Between Organic and Aqueous Phases: Investigations Using a Continuously Stirred Flow Cell.

Descriptive Note : Doctoral thesis,

Corporate Author : AIR FORCE INST OF TECH WRIGHT-PATTERSON AFB OH

Personal Author(s) : Heyse, Edward

PDF Url : ADA289451

Report Date : DEC 1994

Pagination or Media Count : 301

Abstract : Contaminant partitioning between organic and aqueous phases in porous media includes nonaqueous phase liquid (NAPL) dissolution and sorption by soil organic matter. Mass transport in the aqueous phase is governed by advection, but partitioning is a diffusion-controlled process. Since diffusion is usually slower than advective transport, dissolution and sorption are often subject to mass transfer (rate) limitations. Mass transfer is often modeled using a first-order, two-site model. Deficiencies of the two-site model include model parameters that are dependent on pore water velocity and an inability to predict slow, long-term desorption (tailing).

Descriptors :   *MASS TRANSFER, *ORGANIC MATERIALS, MODELS, PARAMETERS, WATER, CELLS, THESES, LONG RANGE(TIME), PHASE, SOILS, TRANSPORT, CONTAMINANTS, FLOW, DESORPTION, ADVECTION, SORPTION, POROUS MATERIALS.

Subject Categories : Physical Chemistry
      Inorganic Chemistry
      Organic Chemistry

Distribution Statement : APPROVED FOR PUBLIC RELEASE