Skip Navigation

Publication Detail

Title: Aqueous photodegradation and toxicity of the polycyclic aromatic hydrocarbons fluorene, dibenzofuran, and dibenzothiophene.

Authors: Shemer, Hilla; Linden, Karl G

Published In Water Res, (2007 Feb)

Abstract: Decay kinetics resulting from the application of UV and UV/H(2)O(2) to the polycyclic aromatic hydrocarbons (PAHs) fluorene, dibenzofuran and dibenzothiophene was studied. Batch experiments were conducted with both low-pressure monochromatic (253.7nm) and medium pressure polychromatic (200-300nm) UV sources alone or in the presence of up to 25mg/L hydrogen peroxide, in a quasi-collimated beam apparatus. Degradation of all three PAHs, by both UV and UV/H(2)O(2), exhibited pseudo-first-order reaction kinetics and low quantum yields ranging from 1.4x10(-3) to 1.8x10(-2)mol/E using both UV lamps. Toxicity testing using a bioluminesence inhibition bioassay was correlated to the decay in concentration of the PAHs as analyzed analytically using HPLC. Results demonstrated that treatment efficacy of oxidative PAH degradation measured by following the decay of the target compound is best complemented by also evaluating the toxicity of the treated water due to byproduct formation concerns.

PubMed ID: 17217979 Exiting the NIEHS site

MeSH Terms: Aliivibrio fischeri/metabolism; Benzofurans/radiation effects; Benzofurans/toxicity; Carcinogens/radiation effects; Carcinogens/toxicity; Chromatography, High Pressure Liquid; Fluorenes/radiation effects; Fluorenes/toxicity; Hydrogen Peroxide/chemistry; Kinetics; Luminescent Measurements; Photolysis*; Polycyclic Aromatic Hydrocarbons/chemistry; Polycyclic Aromatic Hydrocarbons/radiation effects*; Polycyclic Aromatic Hydrocarbons/toxicity*; Thiophenes/radiation effects; Thiophenes/toxicity; Ultraviolet Rays; Water Pollutants, Chemical/radiation effects*; Water Pollutants, Chemical/toxicity*

Back
to Top