In her PhD thesis, Silvia Larumbe-Abuin has developed nanostructures that assist in the process to decontaminate water.
The nanostructures (particles of a microscopic size of between 1 and 100 nanometres) are coated in titanium oxide to which nitrogen has been added. This allows sunlight, rather than ultraviolet radiation, to trigger the process involving the chemical reaction and destruction of contaminants.
Dissolution process of organic particles through nanoparticles
Nafarroako Unibertsitate Publikoa.
What is more, thanks to the magnetic nucleus of the particles, once the process has been carried out, they can be retrieved and reused. Silvia Larumbe’s thesis is entitled: “Síntesis, caracterización y aplicaciones de nanoestructuras basadas en óxidos de metales de transición” [Synthesis, characterisation and applications of nanostructures based on transition metal oxides].
The basis of the research conducted is the phenomenon known as photocatalysis: when light affects a substance that acts as a catalyst, the speed of the chemical reaction is increased. In this case, the light activates the titanium oxide and different oxidizing radicals are formed; the latter destroy the organic contaminants in the water, which could be colouring agents, solvents, detergents, etc.
As the author of the work explained, "it is a sustainable system that could be used as an alternative to different treatments used traditionally in waste water treatment and, specifically, to eliminate certain organic contaminants".
One of the advantages of this development is the possibility of using sunlight instead of ultraviolet light. “Since nitrogen is added to the coating of the particles, the mechanism that will trigger the process can be sunlight rather than ultraviolet radiation, which means a more accessible, less expensive alternative that poses fewer risks.”
The fact that structures of a nanometric size are used also improves photocatalytic capability since the surface of the photocatalyst is greater. Another advantage is the reuse of the catalysing component; since the nanostructures are formed using a magnetic nucleus, they can be retrieved by applying an external magnetic field.
Silvia Larumbe graduated in Chemistry at the University of Navarre, did a Master’s in Chemical Science and Technology at the UNED (Open University) and obtained her PhD in the Department of Physics of the NUP/UPNA. She has participated in over twenty or so national and international conferences, is the co-author of twelve research papers, and has participated in various research projects.
Oihane Lakar | Eurek Alert!
Researchers at Fraunhofer monitor re-entry of Chinese space station Tiangong-1
21.03.2018 | Fraunhofer-Institut für Hochfrequenzphysik und Radartechnik FHR
Taming chaos: Calculating probability in complex systems
21.03.2018 | American Institute of Physics
An international team of researchers has discovered a new anti-cancer protein. The protein, called LHPP, prevents the uncontrolled proliferation of cancer cells in the liver. The researchers led by Prof. Michael N. Hall from the Biozentrum, University of Basel, report in “Nature” that LHPP can also serve as a biomarker for the diagnosis and prognosis of liver cancer.
The incidence of liver cancer, also known as hepatocellular carcinoma, is steadily increasing. In the last twenty years, the number of cases has almost doubled...
In just a few weeks from now, the Chinese space station Tiangong-1 will re-enter the Earth's atmosphere where it will to a large extent burn up. It is possible that some debris will reach the Earth's surface. Tiangong-1 is orbiting the Earth uncontrolled at a speed of approx. 29,000 km/h.Currently the prognosis relating to the time of impact currently lies within a window of several days. The scientists at Fraunhofer FHR have already been monitoring Tiangong-1 for a number of weeks with their TIRA system, one of the most powerful space observation radars in the world, with a view to supporting the German Space Situational Awareness Center and the ESA with their re-entry forecasts.
Following the loss of radio contact with Tiangong-1 in 2016 and due to the low orbital height, it is now inevitable that the Chinese space station will...
Fraunhofer Institute for Organic Electronics, Electron Beam and Plasma Technology FEP, provider of research and development services for OLED lighting solutions, announces the founding of the “OLED Licht Forum” and presents latest OLED design and lighting solutions during light+building, from March 18th – 23rd, 2018 in Frankfurt a.M./Germany, at booth no. F91 in Hall 4.0.
They are united in their passion for OLED (organic light emitting diodes) lighting with all of its unique facets and application possibilities. Thus experts in...
A new scenario seeking to explain how Mars' putative oceans came and went over the last 4 billion years implies that the oceans formed several hundred million...
For the first time, an interdisciplinary team from the University of Basel has succeeded in integrating artificial organelles into the cells of live zebrafish embryos. This innovative approach using artificial organelles as cellular implants offers new potential in treating a range of diseases, as the authors report in an article published in Nature Communications.
In the cells of higher organisms, organelles such as the nucleus or mitochondria perform a range of complex functions necessary for life. In the networks of...
19.03.2018 | Event News
16.03.2018 | Event News
13.03.2018 | Event News
22.03.2018 | Trade Fair News
22.03.2018 | Earth Sciences
22.03.2018 | Earth Sciences