Nonequilibrium sorption and transport of neutral and ionized chlorophenols

Journal Article · Mon Apr 01 04:00:00 EST 1991 · Environmental Science and Technology; (United States)

DOI:https://doi.org/10.1021/es00016a018· OSTI ID:5185805

Lee, L S; Rao, P S.C.; Brusseau, M L ^[1]

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1. Univ. of Florida, Gainesville (United States)

For a series of chlorophenols sorption nonequilibrium was assessed by fitting a bicontinuum sorption model to breakthrough curves measured by miscible displacement techniques. A single log-log inverse relationship was observed between the desorption rate coefficient (k{sub 2}, h{sup {minus}1}) and the equilibrium sorption constant (K{sub p}, mL/g) for all chlorophenols as well as for a series of chlorobenzenes. This suggests that approach to sorption equilibrium for neutral and ionized chlorophenols is constrained in a manner similar to that for nonpolar hydrophobic organic chemicals. For neutral pentachlorophenol (PCP), K{sub p} values decreased log-linearly with increasing volume fraction methanol (f{sub c}), with successful extrapolation of these data to aqueous systems. A log-linear relationship was observed between k{sub 2} and f{sub c} in good agreement with independent estimates. For a series of ionized chlorophenols, the fraction of instantaneous sorption domains (F) increased with increasing solute hydrophobicity, while F decreased with increasing f{sub c} for neutral PCP.

• OSTI ID: 5185805
• Journal Information: Environmental Science and Technology; (United States), Journal Name: Environmental Science and Technology; (United States) Vol. 25:4; ISSN ESTHA; ISSN 0013-936X
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400102* -- Chemical & Spectral Procedures
54 ENVIRONMENTAL SCIENCES
540220 -- Environment
Terrestrial-- Chemicals Monitoring & Transport-- (1990-)
540320 -- Environment
Aquatic-- Chemicals Monitoring & Transport-- (1990-)
ABSORPTION SPECTROSCOPY
ALCOHOLS
AQUEOUS SOLUTIONS
AROMATICS
CHARGED PARTICLES
CHLORINATED AROMATIC HYDROCARBONS
CHROMATOGRAPHY
DATA ANALYSIS
DISPERSIONS
ENVIRONMENTAL TRANSPORT
EQUILIBRIUM
HALOGENATED AROMATIC HYDROCARBONS
HYDROXY COMPOUNDS
IONS
LIQUID COLUMN CHROMATOGRAPHY
MASS TRANSFER
MATHEMATICAL MODELS
METHANOL
MIXTURES
ORGANIC CHLORINE COMPOUNDS
ORGANIC COMPOUNDS
ORGANIC HALOGEN COMPOUNDS
PHENOLS
PHYSICAL PROPERTIES
SEPARATION PROCESSES
SOLUBILITY
SOLUTIONS
SORPTION
SPECTRA
SPECTROSCOPY
THERMODYNAMIC PROPERTIES
ULTRAVIOLET SPECTRA