However, it was not possible to determine if the first deep ocean use of oil dispersants worked as planned in breaking up and dissipating the oil. Their study, the first peer-reviewed research published on the fate of oil dispersants added to underwater ocean environments, appears in ACS' journal Environmental Science & Technology.
Elizabeth Kujawinski and colleagues note ongoing concern about the environmental fate of the 1.4 million gallons of dispersant applied to the ocean surface and the 770,000 gallons of dispersant pumped to the mile-deep well head during the oil spill in the Gulf of Mexico. Many studies show that dispersants added to surface oil spills prevent them from coating and harming sensitive coastal environments, but no large-scale applications of dispersants in deep water had been conducted until the Deepwater Horizon oil spill. Thus, no data exists on the environmental fate of dispersants in deep water, the scientists say.
The scientists collected and analyzed seawater samples from the Gulf of Mexico for the presence of a key dispersant ingredient, called DOSS (dioctyl sodium sulfosuccinate), during the active oil flow and again after the flow had ceased. They found DOSS became concentrated in the deepwater plumes of suspended oil and gas at depths of up to three-quarters of a mile and did not mix with the surface applications of dispersant. They also detected the dispersant ingredient at distances of nearly 200 miles from the well two months after deepwater dispersant applications ceased, indicating it was not rapidly biodegraded. Their data is not sufficient to resolve whether the dispersant was effective in dispersing the oil coming out of the wellhead. However, the scientists argue that the persistence of the dispersant over long distances and time periods justifies further study of the effects of chemical dispersant and oil mixture exposure.
The authors acknowledge funding from the National Science Foundation, the Gordon and Betty Moore Foundation and from the Woods Hole Oceanographic Institution.ARTICLE FOR IMMEDIATE RELEASE
Michael Bernstein | EurekAlert!
Cancer diagnosis: no more needles?
25.05.2018 | Christian-Albrechts-Universität zu Kiel
Less is more? Gene switch for healthy aging found
25.05.2018 | Leibniz-Institut für Alternsforschung - Fritz-Lipmann-Institut e.V. (FLI)
The more electronics steer, accelerate and brake cars, the more important it is to protect them against cyber-attacks. That is why 15 partners from industry and academia will work together over the next three years on new approaches to IT security in self-driving cars. The joint project goes by the name Security For Connected, Autonomous Cars (SecForCARs) and has funding of €7.2 million from the German Federal Ministry of Education and Research. Infineon is leading the project.
Vehicles already offer diverse communication interfaces and more and more automated functions, such as distance and lane-keeping assist systems. At the same...
A research team led by physicists at the Technical University of Munich (TUM) has developed molecular nanoswitches that can be toggled between two structurally different states using an applied voltage. They can serve as the basis for a pioneering class of devices that could replace silicon-based components with organic molecules.
The development of new electronic technologies drives the incessant reduction of functional component sizes. In the context of an international collaborative...
At the LASYS 2018, from June 5th to 7th, the Laser Zentrum Hannover e.V. (LZH) will be showcasing processes for the laser material processing of tomorrow in hall 4 at stand 4E75. With blown bomb shells the LZH will present first results of a research project on civil security.
At this year's LASYS, the LZH will exhibit light-based processes such as cutting, welding, ablation and structuring as well as additive manufacturing for...
There are videos on the internet that can make one marvel at technology. For example, a smartphone is casually bent around the arm or a thin-film display is rolled in all directions and with almost every diameter. From the user's point of view, this looks fantastic. From a professional point of view, however, the question arises: Is that already possible?
At Display Week 2018, scientists from the Fraunhofer Institute for Applied Polymer Research IAP will be demonstrating today’s technological possibilities and...
So-called quantum many-body scars allow quantum systems to stay out of equilibrium much longer, explaining experiment | Study published in Nature Physics
Recently, researchers from Harvard and MIT succeeded in trapping a record 53 atoms and individually controlling their quantum state, realizing what is called a...
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