Now showing items 1-20 of 24

    • Activation process of air stable nanoscale zero-valent iron particles 

      Ribas Fargas, David; Cernik, M.; Benito Páramo, José Antonio; Filip, J.; Martí Gregorio, Vicenç (2017-07-15)
      Article
      Open Access
      Nanoscale Zero Valent Iron (nZVI) represents a promising material for subsurface water remediation technology. However, dry, bare nZVI particles are highly reactive, being pyrophoric when they are in contact with air. The ...
    • Assessment of the water chemical quality improvement based on human health risk indexes: Application to a drinking water treatment plant incorporating membrane technologies 

      Lopez Roldan, Ramon; Rubalcaba Mauri, Alicia; Martín-Alonso, Jordi; Gonzalez, Susana; Martí Gregorio, Vicenç; Cortina Pallás, José Luís (Elsevier, 2016-01-01)
      Article
      Open Access
      A methodology has been developed in order to evaluate the potential risk of drinking water for the health of the consumers. The methodology used for the assessment considered systemic and carcinogenic effects caused by ...
    • Changes of heavy metal and PCB contents in surficial sediments of the Barcelona harbour after the opening of a new entrance 

      Gibert Agulló, Oriol; Martínez Lladó, Xavier; Martí Gregorio, Vicenç; Diez, S.; Romo, J; Bayona i Termens, Josep Maria; Pablo Ribas, Joan de (2009-11)
      Article
      Restricted access - publisher's policy
      The Barcelona harbour is one of the biggest and most important in commercial and passenger traffic in the Mediterranean Sea. In 2003, construction works for the enlargement of the port were carried out with the opening ...
    • Determination of the equilibrium formation constants of two U(VI)-peroxide complexes at alkaline pH 

      Meca, S.; Martínez Torrents, Albert; Martí Gregorio, Vicenç; Giménez Izquierdo, Francisco Javier; Casas Pons, Ignasi; Pablo Ribas, Joan de (2011)
      Article
      Open Access
      The formation of uranyl-peroxide complexes was studied at alkaline media by using UV-Visible spectrophotometry and the STAR code. Two different complexes were found at a H2O2/U(VI) ratio lower than 2. A graphical method ...
    • Direct As(V) Determination Using Screen-Printed Electrodes Modified with Silver Manoparticles 

      Torres Rivero Andrade, Karina Victoria Alejandra; Pérez Ràfols, Clara; Bastos Arrieta, Julio Alonso; Florido Pérez, Antonio; Martí Gregorio, Vicenç; Serrano Plana, Núria (2020-06-30)
      Article
      Open Access
      Carbon-nanofiber-based screen-printed electrodes modified with silver nanoparticles (Ag-NP-SPCNFEs) were tested in a pioneering manner for the direct determination of As(V) at low µg L–1 levels by means of differential ...
    • Ecological screening indicators of stress and risk for the Llobregat river water 

      Lopez Roldan, Ramon; Jubany, Irene; Martí Gregorio, Vicenç; Gonzalez, Susana; Cortina Pallás, José Luís (Elsevier, 2013-12-15)
      Article
      Restricted access - publisher's policy
      The objective of this article is to develop and apply several simple and rough indicators for river aquatic ecosystems assessment in order to screen potential chemical stressors. Several indicators, based on toxicity (PNEC) ...
    • Effects of enhanced denitrification on hydrodynamics and microbial community structure in a soil column system 

      Calderer, M.; Martí Gregorio, Vicenç; De Pablo, Joan; Guivernau Ribalta, Miriam; Prenafeta Boldú, Francesc Xavier; Viñas Canals, Marc (2014-03-01)
      Article
      Restricted access - publisher's policy
      Enhanced heterotrophic denitrification by adding glucose was investigated by means of a soil column experiment which simulated the groundwater flow. The carbon-to-nitrogen ratio was the main factor determining denitrification ...
    • High reactive nano zero-valent iron produced via wet milling through abrasion by alumina 

      Ribas Fargas, David; Pešková, Kristýna; Jubany, Irene; Parma, Pert; Cernik, M.; Benito Páramo, José Antonio; Martí Gregorio, Vicenç (2019-06-15)
      Article
      Open Access
      The performance of new nano zero-valent iron (nZVI) particles produced by a promising new milling method in organic solvent was examined. The basic feature of the new process involves the addition of abrasive alumina ...
    • Human Health Risk Assessment of a landfill based on volatile organic compounds emission, immission and soil gas concentration measurements 

      Martí Gregorio, Vicenç; Jubany, Irene; Perez, Consol; Rubio, Xavier; De Pablo, Joan; Giménez Izquierdo, Francisco Javier (2014-10-01)
      Article
      Restricted access - publisher's policy
      A Human Health Risk Assessment (HHRA) was required for a closed landfill located in Cerdanyola del Valles (Barcelona, Spain). The FIHRA had two objectives, to evaluate the present risk of the identified receptors in the ...
    • Improvements in nanoscale zero-valent iron production by milling through the addition of alumina 

      Ribas Fargas, David; Cernik, M.; Martí Gregorio, Vicenç; Benito Páramo, José Antonio (2016-06-02)
      Article
      Open Access
      A new milling procedure for a cost-effective production of nanoscale zero-valent iron for environmental remediation is presented. Conventional ball milling of iron in an organic solvent as Mono Ethylene Glycol produces ...
    • Modelling enhanced groundwater denitrification in batch micrococosm tests 

      Calderer, M.; Jubany, Irene; Pérez Magrané, Ramon; Martí Gregorio, Vicenç; Pablo Ribas, Joan de (2010)
      Article
      Restricted access - publisher's policy
      In the last few years, enhanced in situ denitrification has gained a lot of interest as a reliable bioremediation option to remove nitrate from groundwater. However, denitrification modelling in the subsurface environment ...
    • Monte carlo simulation as a tool to show the influence of the human factor into the quantitative risk assessment 

      González Dan, José Roberto; Guix Pujolar, Alan; Martí Gregorio, Vicenç; Arnaldos Viger, Josep; Darbra Roman, Rosa Maria (2016-07)
      Article
      Open Access
      The frequency of occurrence of an accident is a key aspect in the risk assessment field. Vari- ables such as the human factor (HF), which is a major cause of undesired events in process industries, are usually not considered ...
    • Nitrate and nitrite reduction by ferrous iron minerals in polluted groundwater: Isotopic characterization of batch experiments 

      Margalef Marti, Rosanna; Carrey, Raul; Benito Páramo, José Antonio; Martí Gregorio, Vicenç; Soler, Albert; Otero, Neus (2020-08-20)
      Article
      Restricted access - publisher's policy
      Since nitrate (NO3-) has been related to human health and environmental problems, safe and sustainable strategies to remediate polluted water bodies must be investigated. This work aims to assess the feasibility of using ...
    • On-line measurement of water quality at Bes òs estuary: effect s of storm and heavy rain episodes 

      Martí Gregorio, Vicenç; Toma, Daniel; Cadena Muñoz, Francisco Javier; Gomáriz Castro, Spartacus; de Pablo, Joan; Cortina Pallás, José Luís; Gibert Agulló, Oriol; Florido Pérez, Antonio; Auge, Xavier; Valderrama, Cesar A. (2021)
      Conference report
      Open Access
      Only 40 % of European Union surface waters (rivers, lakes and transitional and coastal waters) are in good ecological status and only 38 % are in good chemical status (EEA, 2018). Ecological status is based on biological ...
    • REACTORS QUÍMICS (7è quadrimestre) 

      Martí Gregorio, Vicenç; Recasens Baxarías, Francisco Javier (Universitat Politècnica de Catalunya, 2013-01-07)
      Exam
      Restricted access to the UPC academic community
    • Sorption and mobility of Sb(V) in calcareous soils of Catalonia (NE Spain): Batch and column experiments 

      Martínez Lladó, Xavier; Valderrama Angel, César Alberto; Rovira Boixaderas, Miquel; Martí Gregorio, Vicenç; Giménez Izquierdo, Francisco Javier; Pablo Ribas, Joan de (2011-01-15)
      Article
      Restricted access - publisher's policy
      The sorption of Sb(V) onto natural calcareous soils was studied in batch and column experiments as a function of physicochemical properties of the soil, namely: organic matter, the active fraction of Fe and Al and the pH ...
    • Sorption of antimony (V) onto synthetic goethite in carbonate medium 

      Martinez-Llado, X; Martínez Lladó, Xavier; Pablo Ribas, Joan de; Giménez Izquierdo, Francisco Javier; Ayora Ibáñez, Carlos; Martí Gregorio, Vicenç; Rovira Boixaderas, Miquel (2008-06)
      Article
      Restricted access - publisher's policy
      The sorption kinetics of antimony(V) on synthetic goethite is very fast compared to the sorption of other metals on goethite (e.g. arsenic and selenium) and depends on temperature, with an activation energy of 49+9 kJ . ...
    • Sorption of selenium(IV) and selenium(VI) onto natural iron oxides: Goethite and hematite 

      Rovira Boixaderas, Miquel; Giménez Izquierdo, Francisco Javier; Martínez Martínez, María del Rosario; Martí Gregorio, Vicenç; Pablo Ribas, Joan de; Martinez-Llado, X; Duro, L (Elsevier, 2008-01)
      Article
      Restricted access - publisher's policy
      Selenium is a toxic element with a relatively high mobility in the natural waters. Iron oxy-hydroxides might play an important role in the migration of this element as well as on its removal from contaminated water. In ...
    • Subsurface nitrate reduction under wetlands takes place in narrow superficial zones 

      Ribas Fargas, David; Calderer, Montserrat; Martí Gregorio, Vicenç; Johnsen, A.R.; Aamand, Jens; Nilsson, B.; Jensen, J. K.; Engesgaard, P.; Morici, C. (2017-01-01)
      Article
      Open Access
      This study aims to investigate the depth distribution of the Nitrate Reduction Potential (NRP) on a natural and a re-established wetland. The obtained NRP provides a valuable data of the driving factors affecting ...
    • Tailored carrier/bacteria technology for rehabilitation of areas with pesticide-containing pollution – AQUAREHAB WP2 

      Ronen, Z.; Weisbrod, N.; Adar, E.; Cohen, M.; Amiaz, Y.; Hermann, S.; Springael, D.; Sorensen, S.R.; Calderer, M.; Martí Gregorio, Vicenç; Bastiaens, L. (2013)
      Conference lecture
      Open Access