Dual Reactive Domain Model for Sorption of Aqueous Organics by Wood Fiber

Severtson, Steven J.; Banerjee, Sujit

doi:10.1006/jcis.2000.7420

Cited by 6 publications

(11 citation statements)

References 39 publications

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“…In agreement with previous results (18), the sorption of phenolic compounds seems to follow a two-step process: (i) a fast initial sorption process onto the active sites of the wood surface within the first 26 h and (ii) a slower diffusion process between the second and the eighth day where migration of the phenolic compounds into the wood matrix can be observed. Depending on the aroma compound studied, Figure 2 shows that the sorption equilibrium was reached after 6-7 days, which is comparable to the results reported by Severtson et al (19) in the case of 2,4,5trichlorophenol sorbed on wood fiber. At equilibrium, the average rate of disappearance is of the order of 25% for all of the volatile compounds studied, except for 4-vinylguaiacol, for which it is nearly 70%.…”

Section: Physicochemical Properties Of the Volatile Compoundssupporting

confidence: 87%

Sorption Behavior of Volatile Phenols at the Oak Wood/Wine Interface in a Model System

Barrera-García

Gougeon

Voilley

et al. 2006

J. Agric. Food Chem.

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The sorption in a model system of aroma compounds of enological interest (mixture of the eight derivatives from guaiacol, 4-ethylphenol, and whiskylactone) onto wood was investigated to assess the influence of wood on the concentration of these volatiles during the aging of wine. To evaluate the influence of the solubility of aroma compounds in sorption phenomena, this parameter was determined for each volatile compound in model wine at 10 and 25 °C. The solubility is significantly higher in the model wine than in water and remains constant in the range of temperatures studied, except for guaiacol and vanillin. Kinetic and equilibrium sorptions were investigated. Sorption kinetics showed that the sorption equilibrium for all aroma compounds was reached after 6−7 days. From the study of the individual sorption isotherms, two distinct kinds of sorption behavior were observed depending on the presence or not of an ethylenic para substituent conjugated to the phenyl ring. K ww partition coefficients between the wood and the model wine were determined, which exhibited an unusual positive variation with temperature. Keywords: Oak wood; model wine; phenolic compounds; sorption; isotherm; solubility

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Section: Physicochemical Properties Of the Volatile Compoundssupporting

confidence: 87%

Sorption Behavior of Volatile Phenols at the Oak Wood/Wine Interface in a Model System

Barrera-García

Gougeon

Voilley

et al. 2006

J. Agric. Food Chem.

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“…The success of the dual-mode model in interpreting the results of the bi-solute experiments lends support to the validity of the dual-mode mechanism of sorption in the studied system. A similar dual-mode mechanism was invoked by Severtson and Banerjee (15) for sorption of chlorophenols on wood pulp.…”

Section: Resultsmentioning

confidence: 56%

“…By applying the dual-mode model, we envision wood to consist of two sorption domains: a partitioning domain characterized by a linear isotherm, and an adsorption domain characterized by a nonlinear isotherm with a maximum capacity (Q) for sorption as a result of a limited number of sorption sites for interaction. The dualmode model is widely used for describing sorption in varied systems, including polymers, soil organic matter, and wood (15,(32)(33)(34). The dual-mode conception can be tested as in this work, by applying a competitor at a high concentration which will occupy all the limited Langmuir sites.…”

Section: Resultsmentioning

confidence: 99%

“…The estimation ability is only qualitative, as many different poorly quantified processes occur in tandem and affect VOC concentrations in the tree. These processes include VOC uptake by roots and their transfer into the transpiration stream (6,7), upward transport in the xylem (8,9), diffusion both into the tree stem and out to the atmosphere (10)(11)(12), sorption onto the woody tissues of the tree (1,(13)(14)(15)(16)(17), and compound transformations inside the tree (3,18,19). Basic understanding of these mechanisms and their interactions in the subsurface-tree-atmosphere continuum, along with obtaining good estimates for the dominant parameters, is essential for the goal of quantifying the relationship between VOC concentrations in the tree and in the subsurface.…”

Section: Introductionmentioning

confidence: 99%

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Competitive Uptake of Trichloroethene and 1,1,1-Trichloroethane byEucalyptus camaldulensisSeedlings and Wood

Tsechansky

et al. 2007

Environ. Sci. Technol.

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The efficient use of trees for taking up volatile organic compounds (VOCs) from the subsurface for remedial and screening purposes is hampered because many poorly quantified co-occurring processes affect VOC concentrations in the tree, the most basic of which are VOC sorption and uptake by roots. Toward understanding the dominant sorption mechanisms, uptake of trichloroethene (TCE) and 1,1,1-trichloroethane (TCA) by Eucalyptus camaldulensis seedlings was studied in both single-solute and bi-solute experiments. Single-solute and bi-solute sorption experiments on wood from a mature Eucalyptus camaldulensis specimen were also carried out. Competition between TCE and TCA for sorption sites was found in both seedling uptake and wood sorption experiments, indicating that partitioning is not the sole mechanism governing compound interactions in these systems. The nonlinear single-solute sorption isotherms on wood were fit by a dual-mode model including partitioning and Langmuir terms. The dual-mode model calculated parameters were consistent with the results of the bi-solute sorption experiments. As a consequence of competitive sorption processes, uptake of individual compounds may be lower than expected when multiple VOC contaminants are present in the subsurface.

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“…A dual reactive domain model (DRDM) is a combined model of linear and Langmuir models, so it can cover linear and non-linear characteristics of sorption behavior. Several researchers have proved the applicability of a DRDM as sorption model (Xing et al, 1996;Weber, 1997, 2000;Weber et al, 1999;Severtson and Banerjee, 2001;Huang et al, 2003).…”

mentioning

confidence: 99%