For his PhD thesis, Unai Iriarte Velasco analysed strategies for reducing levels of subproducts from the disinfection of drinkable water and their application in optimising the functioning of water treatment plants.
The thesis, recently presented at the University of the Basque Country, centres on the treatment of drinkable water. Currently it is known that the chlorine employed as disinfectant reacts with the natural organic material present in surface water. This interaction is responsible for the presence of certain undesirable substances known as disinfection subproducts. In fact, current legislation includes some of these disinfection subproducts amongst their criteria for the first time. The general aim of the thesis was to evaluate the factors that favour the formation of these subproducts and thus reduce the levels of exposition derived from the consumption of drinkable water.
The thesis has managed to establish the influence of the physicochemical characteristics of the supply water. The efficacy of the various treatments available was studied and new tools for the on-line control of the water purification plants have been developed. Moreover, according to the author, a higher quality product is not obtained using a greater amount of disinfectant.
Garazi Andonegi | alfa
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Spectrally narrow x-ray pulses may be “sharpened” by purely mechanical means. This sounds surprisingly, but a team of theoretical and experimental physicists developed and realized such a method. It is based on fast motions, precisely synchronized with the pulses, of a target interacting with the x-ray light. Thereby, photons are redistributed within the x-ray pulse to the desired spectral region.
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Physicists working with researcher Oriol Romero-Isart devised a new simple scheme to theoretically generate arbitrarily short and focused electromagnetic fields. This new tool could be used for precise sensing and in microscopy.
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Fraunhofer IPA has developed a proximity sensor made from silicone and carbon nanotubes (CNT) which detects objects and determines their position. The materials and printing process used mean that the sensor is extremely flexible, economical and can be used for large surfaces. Industry and research partners can use and further develop this innovation straight away.
At first glance, the proximity sensor appears to be nothing special: a thin, elastic layer of silicone onto which black square surfaces are printed, but these...
3-D shape acquisition using water displacement as the shape sensor for the reconstruction of complex objects
A global team of computer scientists and engineers have developed an innovative technique that more completely reconstructs challenging 3D objects. An ancient...
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