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Desorption kinetics of chlorobenzenes, polycyclic aromatic hydrocarbons, and polychlorinated biphenyls: Sediment extraction with Tenax® and effects of contact time and solute hydrophobicity
Author(s) -
Cornelissen Gerard,
van Noort Paul C. M.,
Govers Harrie A. J.
Publication year - 1997
Publication title -
environmental toxicology and chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.1
H-Index - 171
eISSN - 1552-8618
pISSN - 0730-7268
DOI - 10.1002/etc.5620160703
Subject(s) - tenax , chlorobenzene , chemistry , desorption , environmental chemistry , kinetics , reaction rate constant , extraction (chemistry) , sediment , chromatography , gas chromatography , adsorption , organic chemistry , physics , quantum mechanics , catalysis , paleontology , biology
A technique using Tenax TA® beads as “sink” for desorbed solute was employed to measure the kinetics of desorption of chlorobenzenes, polychlorinated biphenyls, and polycyclic aromatic hydrocarbons from laboratory‐contaminated sediment. First‐order rate constants of rapid and slow desorption were in the order of 10 −1 /h and 10 −3 /h, respectively. The rate constants of slow desorption correlate well with the molecular volumes of the compounds used and decrease between 2 and 34 d of equilibration. Slowly desorbing fractions increase with both increasing solute hydrophobicity and increasing equilibration time.