PMID: 15230310Jul 3, 2004Paper

Model-aided characterization of Tenax-TA for aromatic compound uptake from water

Environmental Toxicology and Chemistry
Dongye Zhao, Joseph J Pignatello

Abstract

The polymer adsorbent Tenax has been widely employed for studying desorption of organic contaminants in soils and sediments and for correlating physical availability with bioavailability. Although Tenax has been invoked to act as an infinite sink that completely and instantaneously removes solutes from the aqueous phase, to our knowledge no systematic characterization of Tenax resins has been carried out. The present study provides equilibrium and kinetic parameters for the uptake of benzene, nitrobenzene, naphthalene, phenanthrene, and pyrene by Tenax in selected water-solute-Tenax systems, and it offers guidelines for the use of Tenax resins. Sorption isotherms of the test compounds on Tenax-TA are nonlinear, and most show an inflection at high concentration, marking a change in physical state from glassy to rubbery. A simple dual-mode model was applied to the isotherms below the apparent inflection point. Sorption parameters for dissolution and hole-filling domains each correlate with the octanol-water partition coefficient. The effects of dissolved organic matter and salinity on Tenax-TA uptake are minor. Regeneration of Tenax-TA by hot-methanol extraction increased its affinity for naphthalene. Inclusion of 23% graphitized...Continue Reading

Citations

Feb 2, 2008·Environmental Geochemistry and Health·Bozena SmreczakAgnieszka Klimkowicz-Pawlas
Sep 8, 2010·Environmental Toxicology and Chemistry·Jake W GinsbachFrank M Dunnivant
Nov 8, 2014·Integrated Environmental Assessment and Management·Michael J LydyPeter F Landrum
Jun 17, 2008·Environmental Pollution·Elizabeth Guthrie NicholsJennifer S Musella
Apr 15, 2010·Journal of Hazardous Materials·Xinglun YangXin Jiang
Sep 29, 2007·Chemosphere·Naressa CofieldA Paul Schwab
Apr 4, 2017·Archives of Environmental Contamination and Toxicology·Samuel A NutileMichael J Lydy
Jun 4, 2021·Langmuir : the ACS Journal of Surfaces and Colloids·Elizabeth H DenisApril J Carman
Oct 29, 2019·Environmental Science & Technology·Meng ZhangXilong Wang

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