| Title: | A novel method for the synergistic remediation of oil-water mixtures using nanoparticles and oil-degrading bacteria |
| Author(s): | Alabresm A; Chen YP; Decho AW; Lead J; |
| Address: | "Center for Environmental Nanoscience and Risk (CENR), Department of Environmental Health Sciences, Arnold School of Public Health, University of South Carolina, Columbia, SC 28209, USA; Department of Biological Development of Shatt Al-Arab & N. Arabian Gulf, Marine Science Centre, University of Basrah, Basrah, Iraq. Department of Environmental Health Sciences, Arnold School of Public Health, University of South Carolina, Columbia, SC 29208, USA. Center for Environmental Nanoscience and Risk (CENR), Department of Environmental Health Sciences, Arnold School of Public Health, University of South Carolina, Columbia, SC 28209, USA. Electronic address: jlead@mailbox.sc.edu" |
| DOI: | 10.1016/j.scitotenv.2018.02.277 |
| ISSN/ISBN: | 1879-1026 (Electronic) 0048-9697 (Linking) |
| Abstract: | "Releases of crude oil and other types of oil from numerous sources can impose catastrophic physical, chemical, and biological effects on aquatic ecosystems. While currently-used oil removal techniques possess many advantages, they have inherent limitations, including low removal efficiencies and waste disposal challenges. The present study quantified the synergistic interactions of polyvinylpyrrolidone (PVP) coated magnetite nanoparticles (NP) and oil-degrading bacteria for enhanced oil removal at the laboratory scale. The results showed that at relatively high oil concentrations (375?ª+mg?ª+L(-1)), NP alone could remove approximately 70% of lower-chain alkanes (C9-C22) and 65% of higher-chain (C23-C26), after only 1?ª+h, when magnetic separation of NP was used. Removal efficiency did not increase significantly after that, which was likely due to saturation of the NP with oil. Microbial bioremediation, using strains of oil-degrading bacteria, removed almost zero oil immediately but 80-90% removal after 24-48?ª+h. The combination of NPs and oil-degrading bacterial strains worked effectively to remove essentially 100% of oil within 48?ª+h or less. This was likely due to the sorption of oil components to NPs and their subsequent utilization by bacteria as a joint Fe and C source, although the mechanisms of removal require further testing. Furthermore, results showed that the emission of selected volatile organic compounds (VOCs) and semi volatile organic compounds (SVOCs) were reduced after addition of NPs and bacteria separately. When combined, VOC and SVOC emissions were reduced by up to 80%" |
| Keywords: | "*Biodegradation, Environmental Magnetite Nanoparticles/*chemistry Petroleum/analysis/*metabolism/microbiology Povidone/chemistry Seawater/chemistry/*microbiology Volatile Organic Compounds/analysis Water Pollutants, Chemical/analysis/*metabolism Iron oxid;" |
| Notes: | "MedlineAlabresm, Amjed Chen, Yung Pin Decho, Alan W Lead, Jamie eng Netherlands 2018/03/21 Sci Total Environ. 2018 Jul 15; 630:1292-1297. doi: 10.1016/j.scitotenv.2018.02.277. Epub 2018 Mar 7" |
