Journal
SCIENCE OF THE TOTAL ENVIRONMENT
Volume 533, Issue -, Pages 82-90Publisher
ELSEVIER
DOI: 10.1016/j.scitotenv.2015.06.102
Keywords
Diesel; Biodegradation; Biostimulation; Proteobacteria; Hydrocarbon
Categories
Funding
- National Science Foundation - CBET [1042743]
- Mississippi State University/Northern Gulf Institute (MSU/NGI) [191001-306911_01/TO 091]
- Dauphin Island Sea Lab/Marine Environmental Science Consortium (DISL/MESC) [2423 Jv, T4-005UA]
- Directorate For Engineering
- Div Of Chem, Bioeng, Env, & Transp Sys [1042743] Funding Source: National Science Foundation
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We investigated different types of biostimulation practices to enhance degradation of weathered conventional diesel fuel in sandy beach sediments from coastal Alabama. Biodegradation rates were measured following the addition of either inorganic nutrients, or organic matter derived from either plant material (Spartina alterniflora) or fish tissue (Chloroscombrus chrysurus) both common to the region. The greatest hydrocarbon degradation rates were observed in the C. chrysurus amended treatments (k=0.0119 d(-1)). Treatment with fish-derived organic matter increased the degradation rates by 104% as compared to control treatments, while inorganic nutrient addition increased the degradation rates by 57%. The addition of plant derived organic matter, however, only marginally enhanced the degradation rates (similar to 7%) during the course of the study. Bacterial 16S rRNA analyses revealed that most sediment microorganisms belonged to the classes; Alphaproteobacteria, Betaproteobacteria, Gammaproteobacteria, and Bacteroidetes. The most frequently abundant hydrocarbon degraders were mostly similar to Achromobater sp., Microbulbifer sp., Ruegeria sp., and Pseudomonas sp. (C) 2015 Elsevier B.V. All rights reserved.
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