Interaction of phenanthrene and its primary metabolite (1-hydroxy-2-naphthoic acid) with estuarine sediments and humic fractions

Journal of Contaminant Hydrology
Sanjai J ParikhWilliam D Burgos

Abstract

Experiments were conducted to compare the sorption and desorption of phenanthrene and its primary degradation product, 1-hydroxy-2-naphthoic acid (HNA), in estuarine sediment, humic acid (HA) and humin. Ionic composition, ionic strength (0.4 M) and pH (7.6) were employed to mimic native estuarine pore water at the sediment-water interface. Sorption to whole sediment and organic matter (OM) fractions was significantly lower for HNA than for phenanthrene. Whereas HNA did not sorb to HA, uptake to sediment and humin was observed, suggesting that HNA does not bind directly to OM. Phenanthrene uptake was characterized by hysteretic behavior and exhibited slow desorption. In contrast, HNA initially was more readily desorbed from sediment and humic fractions, but a significant fraction was not recovered in repeated desorption runs. The lower sorption of HNA reflects its greater polarity and water solubility, but the consistent retention of a non-desorbing fraction suggests strong binding and/or chemical transformation reactions may be important. It was postulated that abiotic transformation of HNA may occur in estuarine sediments, in part due to the presence of redox active minerals (Fe(III) and Mn(IV) oxides). The presence of Fe and ...Continue Reading

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Citations

May 31, 2012·Current Microbiology·Jing LuChuling Guo
Mar 27, 2013·World Journal of Microbiology & Biotechnology·Jing LuRenren Wu
Apr 25, 2008·Marine Pollution Bulletin·Michael W CarneySeth W Kullman
Feb 14, 2006·Journal of Contaminant Hydrology·William D Burgos, Nipon Pisutpaisal
Dec 23, 2015·Journal of Toxicology and Environmental Health. Part B, Critical Reviews·Chiara FrazzoliAlberto Mantovani
Jul 6, 2012·Journal of Applied Microbiology·T-C FengX-M Yang
Nov 10, 2010·Environmental Science & Technology·K Hanna, J-F Boily

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