Forum for Science, Industry and Business

Sponsored by:     3M 
Search our Site:

 

Radioactive plutonium remains from US military accident in Spain

20.10.2003


Researchers from the Physics Department and the Institute of Environmental Science and Technology (ICTA) of the Universitat Autònoma de Barcelona have detected concentrations of radioactive plutonium and americium in plankton from the coast of Palomares (south-east coast of Spain), with an activity level five times higher than the average of other samples taken from the Mediterranean. This is residual contamination from the air accident that occurred on 17 January 1966, when two US military aircraft collided. However, the radioactivity levels are still within safety margins.



Radioactive elements from the marine environment may pass into the human food chain via plankton when marine products are consumed. With the aim of studying this transference, scientists have established the concentrations of radioelements plutonium (Pu-239,240) and americium (Am-241) in plankton samples taken from different areas of the north-west Mediterranean. Specifically, researchers compared samples from the gulf of Vera (in the area of Palomares, Almeria), Garrucha beach (Almeria), Mallorca, the Gulf of Sant Jordi (Baix Ebre, Catalonia), the coast of Barcelona, and the Golf of Lyon (France).

The results of the research clearly show that plankton from the coast of Palomares, obtained from a depth of 50 metres, contains radioactive plutonium and americium with an activity up to five times higher than the average of the other samples studied. Thus, while average radioactivity in western Mediterranean plankton is around 452 units (millibequerels per kilogram of dried plankton), at Palomares this figure is 2,046 units. This is still within the safety margins recommended by the International Atomic Energy Agency, but serves as a reminder that the area is not free of residual contamination arising from the accident that occurred on 17 January 1966, when two US planes, a B-52 bomber, loaded with 4 nuclear warheads, and a refuelling plane collided in mid-flight.


Other sources of radioactive elements present in small quantities in Mediterranean plankton are the remains of nuclear tests carried out between 1952 and 1963 around the world, residues from nuclear power stations, and the Chernobyl accident of 1986. These activities have gradually left radioactive elements in the marine environment which, in simple terms, have been transferred to the phytoplankton (plant plankton), then to the zooplankton (animal plankton), and from here to certain marine products that we consume. Therefore, it is vital that checks are made on radioactivity levels in plankton in order to provide global assurances of the safety of marine products.

This research, directed by the UAB lecturer Joan Albert Sánchez Cabeza, and in which researchers from the Institute of Marine Sciences of Barcelona and two research centres in Eire and the United States have also participated, is published in the journal The Science of the Total Environment.

Octavi López Coronado | alfa
Further information:
http://www.uab.es

More articles from Ecology, The Environment and Conservation:

nachricht Global threat to primates concerns us all
19.01.2017 | Deutsches Primatenzentrum GmbH - Leibniz-Institut für Primatenforschung

nachricht Reducing household waste with less energy
18.01.2017 | FIZ Karlsruhe – Leibniz-Institut für Informationsinfrastruktur GmbH

All articles from Ecology, The Environment and Conservation >>>

The most recent press releases about innovation >>>

Die letzten 5 Focus-News des innovations-reports im Überblick:

Im Focus: Traffic jam in empty space

New success for Konstanz physicists in studying the quantum vacuum

An important step towards a completely new experimental access to quantum physics has been made at University of Konstanz. The team of scientists headed by...

Im Focus: How gut bacteria can make us ill

HZI researchers decipher infection mechanisms of Yersinia and immune responses of the host

Yersiniae cause severe intestinal infections. Studies using Yersinia pseudotuberculosis as a model organism aim to elucidate the infection mechanisms of these...

Im Focus: Interfacial Superconductivity: Magnetic and superconducting order revealed simultaneously

Researchers from the University of Hamburg in Germany, in collaboration with colleagues from the University of Aarhus in Denmark, have synthesized a new superconducting material by growing a few layers of an antiferromagnetic transition-metal chalcogenide on a bismuth-based topological insulator, both being non-superconducting materials.

While superconductivity and magnetism are generally believed to be mutually exclusive, surprisingly, in this new material, superconducting correlations...

Im Focus: Studying fundamental particles in materials

Laser-driving of semimetals allows creating novel quasiparticle states within condensed matter systems and switching between different states on ultrafast time scales

Studying properties of fundamental particles in condensed matter systems is a promising approach to quantum field theory. Quasiparticles offer the opportunity...

Im Focus: Designing Architecture with Solar Building Envelopes

Among the general public, solar thermal energy is currently associated with dark blue, rectangular collectors on building roofs. Technologies are needed for aesthetically high quality architecture which offer the architect more room for manoeuvre when it comes to low- and plus-energy buildings. With the “ArKol” project, researchers at Fraunhofer ISE together with partners are currently developing two façade collectors for solar thermal energy generation, which permit a high degree of design flexibility: a strip collector for opaque façade sections and a solar thermal blind for transparent sections. The current state of the two developments will be presented at the BAU 2017 trade fair.

As part of the “ArKol – development of architecturally highly integrated façade collectors with heat pipes” project, Fraunhofer ISE together with its partners...

All Focus news of the innovation-report >>>

Anzeige

Anzeige

Event News

Sustainable Water use in Agriculture in Eastern Europe and Central Asia

19.01.2017 | Event News

12V, 48V, high-voltage – trends in E/E automotive architecture

10.01.2017 | Event News

2nd Conference on Non-Textual Information on 10 and 11 May 2017 in Hannover

09.01.2017 | Event News

 
Latest News

Helmholtz International Fellow Award for Sarah Amalia Teichmann

20.01.2017 | Awards Funding

An innovative high-performance material: biofibers made from green lacewing silk

20.01.2017 | Materials Sciences

Ion treatments for cardiac arrhythmia — Non-invasive alternative to catheter-based surgery

20.01.2017 | Life Sciences

VideoLinks
B2B-VideoLinks
More VideoLinks >>>