Modeling Uncoupled Solute Transport in Natural Organic Matter Size Fractionation by Ultrafiltration

Physicochemical separation of organic macrosolutes and colloidal particles is routinely required during the analysis of natural, waste, and process waters derived from aquatic and terrestrial environmental samples. This study was conducted to demonstrate the utility of a two-parameter nonlinear perm...

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Bibliographic Details
Published in:Journal of environmental engineering (New York, N.Y.) N.Y.), 2003-01, Vol.129 (1), p.33-42
Main Authors: Tadanier, Christopher J, Berry, Duane F, Knocke, William R
Format: Article
Language:English
Subjects:
Analysis methods
Applied sciences
Coefficients
Colloiding
Correlation analysis
Dilution
Distillation
Environmental engineering
Exact sciences and technology
Mathematical models
Membranes
Natural water pollution
Penetration
Pollution
Separation
Solutes
TECHNICAL PAPERS
Wastes
Wastewaters
Water treatment and pollution
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Summary:Physicochemical separation of organic macrosolutes and colloidal particles is routinely required during the analysis of natural, waste, and process waters derived from aquatic and terrestrial environmental samples. This study was conducted to demonstrate the utility of a two-parameter nonlinear permeation coefficient model (PCM) in describing the uncoupled transport of solutes in dilute heterogeneous solutions subjected to batch ultrafiltration (UF). The PCM was used in conjunction with natural organic matter (NOM) permeate data for a natural water and six hydrophobic and hydrophilic subfractions to determine permeation coefficients p and NOM concentrations Cr0 with apparent molecular weight less than membrane specific cutoff values of moderately hydrophilic YC/YM series Amicon® UF membranes. Experimentally measured permeation coefficients p determined for the whole water were found to correlate well with composite permeation coefficients p* calculated using a mass-fraction weighted average of individual NOM subfraction permeation coefficient values. Correlation of experimentally measured and calculated permeation coefficient values (p and p*) indicated that the PCM can adequately describe uncoupled transport of chemically distinct solute fractions during batch UF of heterogeneous dilute solutions.
ISSN:0733-9372
1943-7870
DOI:10.1061/(ASCE)0733-9372(2003)129:1(33)