Effect of dispersants on the biodegradation of South Louisiana crude oil at 5 and 25 °C
| Autor: | Makram T. Suidan, Albert D. Venosa, Robyn N. Conmy, Gulizhaer Abulikemu, Pablo Campo, Mobing Zhuang, William E. Platten |
|---|---|
| Rok vydání: | 2016 |
| Předmět: |
0301 basic medicine
Environmental Engineering Health Toxicology and Mutagenesis 030106 microbiology Fraction (chemistry) 010501 environmental sciences 01 natural sciences Dispersant Surface-Active Agents 03 medical and health sciences chemistry.chemical_compound Pulmonary surfactant Alkanes Environmental Chemistry Organic chemistry Polycyclic Aromatic Hydrocarbons Dissolution 0105 earth and related environmental sciences Temperature Public Health Environmental and Occupational Health Aqueous two-phase system General Medicine General Chemistry Biodegradation Louisiana Pollution Biodegradation Environmental Petroleum chemistry Environmental chemistry Corexit |
| Zdroj: | Chemosphere. 144:767-774 |
| ISSN: | 0045-6535 |
| DOI: | 10.1016/j.chemosphere.2015.08.040 |
| Popis: | This article reports biodegradation rates for a commercial dispersant, JD-2000, South Louisiana crude oil (SLC) alone, and SLC dispersed with JD-2000 at 5 and 25 °C. Results from the biodegradation experiments revealed that Component X, a chemical marker for JD-2000, rapidly degraded at both temperatures. The application of JD-2000 decreased by half the overall biodegradation rate of aliphatic compounds at 25 °C. At 5 °C, a residual fraction consisting of iso- and n-alkanes (C29-C35) persisted after 56 d. The combination of dispersant and higher temperature resulted in faster removal rates for 2- and 3-ring polycyclic aromatic hydrocarbons. When compared with Corexit 9500, our results suggest that the chemistry of the surfactant (or surfactants) in JD-2000 might have favored oil dissolution (substrate transport to the aqueous phase) as an uptake mechanism over adhesion, which requires direct contact of the biomass with the oil. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|
Full Text from ScienceDirect