Enhanced Bio-Mineralization by Riboflavin Photosensitization and its Significance to Detoxification of Benzo[a]pyrene

In this study, ¹⁴C-benzo[a]pyrene (BaP) was chosen as a model compound to investigate if photosensitization by riboflavin enhances the subsequent microbial mineralization of polycyclic aromatic hydrocarbons (PAHs) in natural aquatic environments. After photolysis, BaP showed an increased toxicity to...

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Bibliographic Details
Published inBulletin of environmental contamination and toxicology Vol. 79; no. 3; pp. 319 - 322
Main Authors Zhao, X, Zhang, Y, Hu, X, Hwang, H. M
Format Journal Article
LanguageEnglish
Published United States New York : Springer-Verlag 01.09.2007
Springer Nature B.V
Subjects
Aquatic environment
Benzo(a)pyrene - chemistry
Benzo(a)pyrene - metabolism
Benzo(a)pyrene - radiation effects
Benzo(a)pyrene - toxicity
Benzo[a]pyrene
Biodegradation, Environmental
Carbon
Carbon dioxide
Carbon Dioxide - metabolism
Cell Line
Detoxification
Epithelial Cells - drug effects
Epithelial Cells - metabolism
Fluoresceins - metabolism
Humans
Microbial degradation
Mineralization
Natural environment
Photolysis
Photosensitizer
Photosensitizing Agents - chemistry
Polycyclic aromatic hydrocarbons
Pyrene
riboflavin
Riboflavin - chemistry
Rivers
Sunlight
Water analysis
Water Microbiology
Water Pollutants, Chemical - chemistry
Water Pollutants, Chemical - metabolism
Water Pollutants, Chemical - radiation effects
Water Pollutants, Chemical - toxicity
Water Purification - methods
Water sampling
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Summary:In this study, ¹⁴C-benzo[a]pyrene (BaP) was chosen as a model compound to investigate if photosensitization by riboflavin enhances the subsequent microbial mineralization of polycyclic aromatic hydrocarbons (PAHs) in natural aquatic environments. After photolysis, BaP showed an increased toxicity to human epithelial cell and natural microbial assemblage. However, BaP mineralization rate in a river water sample containing riboflavin is roughly twice of that without riboflavin after the 2-day incubation. Thus, the results imply that microbial assemblage can mineralize BaP photoproducts to carbon dioxide and a combination of riboflavin photosensitization and microbial degradation could lead to complete detoxification of PAHs.
Bibliography:http://dx.doi.org/10.1007/s00128-007-9259-7
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ISSN:0007-4861
1432-0800
DOI:10.1007/s00128-007-9259-7