HOME HELP FEEDBACK SUBSCRIPTIONS ARCHIVE SEARCH TABLE OF CONTENTS		QUICK SEARCH:   [advanced] Author: Keyword(s): Year:  Vol:  Page:

This Article Abstract Full Text Free Full Text (PDF) Free Alert me when this article is cited Alert me if a correction is posted Services Related articles in JEQ Similar articles in this journal Similar articles in ISI Web of Science Similar articles in PubMed Alert me to new issues of the journal Download to citation manager Citing Articles Citing Articles via ISI Web of Science (2) Citing Articles via Google Scholar Google Scholar Articles by Holt, J. Articles by Sanford, R. Search for Related Content PubMed PubMed Citation Articles by Holt, J. Articles by Sanford, R. Agricola Articles by Holt, J. Articles by Sanford, R. Related Collections Other Contaminants Microbial Processes Bioremediation and Biodegradation

9,10-Phenanthrenequinone Photoautocatalyzes its Formation from Phenanthrene, and Inhibits Biodegradation of Naphthalene

^a Department of Civil and Environmental Engineering, University of Illinois at Urbana-Champaign, Urbana, IL 61801
^b Department of Natural Resources and Environmental Sciences, University of Illinois at Urbana-Champaign, Urbana, IL 61801
^c Department of Geology, University of Illinois at Urbana-Champaign, Urbana, IL 61801
^d Department of Crop Sciences, University of Illinois at Urbana-Champaign, Urbana, IL 61801

View larger version (12K): [in a new window]   Fig. 1. Structures of various polycyclic aromatic hydrocarbons (PAHs).

View larger version (12K): [in a new window]   Fig. 2. Photodegradation of phenanthrene in 1:1 acetonitrile to water.

View larger version (17K): [in a new window]   Fig. 3. Comparison of photodegradation of phenanthrene (0.01 mM) with and without an equimolar amount of phenanthrenequinone added at the beginning of the reaction.

View larger version (17K): [in a new window]   Fig. 4. Comparison of photodegradation of phenanthrene in air-saturated and argon-purged solution.

View larger version (33K): [in a new window]   Fig. 5. Percent removal of naphthalene (Nap) by a Nap-degrading community in the presence of various 9,10-phenanthrenequinone (PheQ) concentrations. The terms "Sat PheQ," "10% Sat PheQ," and "1% sat PheQ" indicate PheQ concentrations at saturation (4 mg/L), 10% of saturation (0.4 mg/L), and 1% of saturation (0.04 mg/L), respectively. "No PheQ" contained no PheQ, while "sterile control" contained no inoculum. Error bars represent two standard errors.

View larger version (25K): [in a new window]   Fig. 6. Naphthalene (Nap) concentrations in Nap-degrading communities in the presence of 9,10-phenanthrenequinone (PheQ) or phenanthrene (Phe). The Nap-containing cultures were amended as follows with Phe or PheQ: "Saturated PheQ," PheQ at saturation (4 mg/L); "Nap only," no PheQ or Phe; "Saturated Phe," Phe at saturation (0.25 mg/L); "Low PheQ," PheQ at 0.25 mg/L; "Sterile controls," two representatives of each previously mentioned treatment containing no inoculum. Error bars represent two standard errors.

View larger version (17K): [in a new window]   Fig. 7. 9,10-Phenanthrenequinone (PheQ) remaining in phenanthrene (Phe)-degrading enrichment as a function of time. Culture was spiked (arrows) twice; first with 200 and then 300 mg/L Phe.