viernes, 23 de julio de 2010

viernes, 18 de junio de 2010

Universidad de California, Berkeley


Desde el pasado 1 de junio estoy realizando una estancia por tres meses en la Universidad de California bajo la direcci'on del Profesor Stephen R. Leone.

miércoles, 20 de febrero de 2008

Plastics recycling sorted

Plastics recycling sorted
[13 de julio de 2006]



Plastic waste is a mess. Disposal in landfill is the worst option but recycling post-consumer plastic waste presents a technological nightmare given the huge range of polymers used in packaging and products. A rapid, online method of identifying the different plastics in a recycling stream would provide a way to sort them and allow recycling plants to operate far more efficiently and perhaps make plastic recycling commercially viable.

A technique being investigated by Spanish researchers to this end is laser-induced plasma spectroscopy (LIPS). Jesús Anzano, María-Esther Casanova, María-Soledad Bermúdez, and Roberto-Jesús Lasheras of the Laser Analytical Spectroscopy Lab at the University of Zaragoza, in Spain, have now demonstrated that LIPS used in conjunction with a simple statistical correlation method can indeed differentiate between plastics prior to recycling.

Among the most commonly used household and industrial plastics are polyethylene terephthalate (PET), high-density polyethylene (HDPE), polyvinyl chloride (PVC), low-density polyethylene (LDPE), polypropylene (PP), and polystyrene (PS). The team has developed a compact LIP spectrometer with which they obtained LIP spectra for these polymers in the 200-800 nm range and compared them with library spectra of recycled plastic samples. The researchers have also developed a computer program for data acquisition and data processing that exploits linear and non-parametric (rank) correlations to classify the spectral data.

"The robustness of the technique was demonstrated by the 90-99% reliable identification of almost all analysed plastics," the researchers says, "The technique has excellent potential for on-line, real-time analysis of recycling materials," they say.


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Miembros del laboratorio láser de la Universidad de Zaragoza

LABORATORIO LÁSER
Universidad de Zaragoza



JESÚS ANZANO LACARTE
JUSTINIANO CASAS GONZÁLEZ,
ROBERTO-JESÚS LASHERAS MOLINA
CRISTINA BELLO GÁLVEZ
SONIA SANGÜESA VILAR
ELIANA GASPAR MORENO
MAYTE BENEDED SERRANO

miércoles, 25 de julio de 2007

Noticias

El pasado 12 de julio Roberto Jesús lasheras defendió su Tesis Doctoral, obteniendo la calificación de sobresaliente "Cum Laude". Enhorabuena.