Comment on "A distributed reactivity model for sorption by soils and sediments, part 4, Intraparticle heterogeneity and phase-distribution relationships under nonequilibrium conditions." (response to W.J. Weber, Jr. and W. Huang, Environ. Sci. Technol., 1996, vol. 30, p. 881)
Article Abstract:
Weber and Huang failed to discuss the limitations of the approach that they used to describe the solute phase distribution of phenanthrene in solution. The approach was based on Freundlich model parameters, Kf and n, for estimating the solute phase distribution relationship between aqueous phenanthrene and phenanthrene sorbed to solid materials. Some clarifications on the sorption processes that were modeled using the approach are discussed.
Publication Name: Environmental Science & Technology
Subject: Science and technology
ISSN: 0013-936X
Year: 1996
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Use of a reactive surface-diffusion model to describe apparent sorption-desorption hysteresis and abiotic degradation of lindane in a subsurface material
Article Abstract:
Several theories on the cause of desorption hysteresis have been developed. A diffusion and reaction model was used to interpret the results of experiments on sorption-desorption and the abiotic degradation of the solute lindane in a subsurface sand material. The results indicated that marked hysteresis was present. A surface-diffusion model suggested that the hysteresis was caused by slow rates of sorption-desorption.
Publication Name: Environmental Science & Technology
Subject: Science and technology
ISSN: 0013-936X
Year: 1992
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Diffusion modeling approaches
Article Abstract:
A general model for describing the heterogeneity of sorption parameters of natural systems was developed. It is shown that multiple-particle class models are more accurate in describing long-term sorption as compared to single-particle techniques. Model parameters were sensitive to the range over which data was collected. Tortuosity factors were in good agreement with theoretically derived values.
Publication Name: Environmental Science & Technology
Subject: Science and technology
ISSN: 0013-936X
Year: 1995
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- Abstracts: A distributed reactivity model for sorption by soils and sediments. 14. Characterization and modeling of phenanthrene desorption rates
- Abstracts: A distributed reactivity model for sorption by soils and sediments. 13. Simulated diagenesis of natural sediment organic matter and its impact on sorption/desorption equilibria
- Abstracts: Theoretical feasibility for ecological biomass ash recirculation: chemical equilibrium behavior of nutrient elements and heavy metals during combustion
- Abstracts: Quantification of uncertainty in reactivity adjustment factors from reformulated gasolines and methanol fuels
- Abstracts: Reactions of OH and NO3 radicals with phenol, cresols, and 2-nitrophenol at 296 plus or minus 2 K. Products of the gas-phase OH and NO3 radical-initiated reactions of naphthalene