PMID: 15230309Jul 3, 2004Paper

Indices for bioavailability and biotransformation potential of contaminants in soils

Environmental Toxicology and Chemistry
Washington J BraidaJoseph J Pignatello

Abstract

Bioavailability is an important consideration in risk assessment of soil contaminants and in the selection of appropriate remediation technologies for polluted sites. The present study examined the bioavailability and biodegradation potential of phenanthrene with respect to a pseudomonad in 15 different soils through separate measurements of mineralization, transformation, and desorption to a polymeric infinite sink (Tenax) after 180-d sterile pre-equilibration with phenanthrene. Fractions strongly resistant to desorption and mineralization at long times were evident in all cases. After correcting for bioconversion (moles mineralized per mole transformed) determined in aqueous particle-free soil extracts, a correlation was found between the biotransformation-resistant fraction and the Tenax desorption-resistant fraction. Indices are proposed to assess bioavailability (BAt) and biotransformation potential (BTPt) of a compound in a soil based on parallel desorption and degradation studies over a selected period t. The BAt is the ratio of moles biotransformed to moles desorbed to an infinite sink, and it reflects the biotransformation rate relative to the maximal desorption rate. Values of BA30 (30-d values) ranged from 0.64 (for ...Continue Reading

Citations

Sep 1, 2012·Environmental Science & Technology·Varvara Gouliarmou, Philipp Mayer
Jan 10, 2013·Journal of Hazardous Materials·Cornelia BernhardtKonstantin Terytze
Oct 16, 2012·Journal of Hazardous Materials·Thierry WoignierMagalie Jannoyer
Apr 15, 2010·Journal of Hazardous Materials·Xinglun YangXin Jiang
Sep 29, 2007·Chemosphere·Naressa CofieldA Paul Schwab
Sep 21, 2011·Environmental Toxicology and Chemistry·Stephen D Richardson, Michael D Aitken
Nov 29, 2005·Journal of Contaminant Hydrology·Nathan W HawsEdward J Bouwer
Feb 20, 2008·Pest Management Science·Jaime VillaverdeColin D Brown
Feb 3, 2011·Journal of Environmental Quality·José-Luis Niqui-Arroyo, José-Julio Ortega-Calvo
Mar 31, 2011·Environmental Science & Technology·Philipp MayerAndreas P Loibner
Dec 6, 2005·Environmental Science & Technology·Cesar Gomez-Lahoz, José-Julio Ortega-Calvo

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