• Adsorption of antipyrine by activated carbons from FeCl3-activation of Tara gum 

      Bedia, Jorge; Belver Coldeira, Carolina; Ponce Álvarez, Silvia; Rodríguez, Juan Martín; Rodríguez, J. J. (Elsevier BV, 2018)
      Acceso restringido
      Activated carbons were synthesized by FeCl3-activation of Tara gum at different temperatures (400–1000 °C). The activating agent and the precursor were physically mixed at different ratios (r= FeCl3:precursor, 0.5–3.0 ...
    • Cellulose Microfibres Obtained from Agro-Industrial Tara Waste for Dye Adsorption in Water 

      Ponce Álvarez, Silvia; Chavarría, María; Norabuena Aliaga, Fiama Vanessa; Chumpitaz, Dalton; Gutarra Espinoza, Abel (Springer, 2020)
      Acceso restringido
      Microfibres of cellulose were extracted from tara residues (TR), obtained after the production process, and used to remove dyes in aqueous solution. Caesalpinia spinosa (Molina) Kuntze or Tara spinosa, commonly known as ...
    • Development and evaluation of an autonomous and portable solar water disinfection reactor based on TiO2 supported films 

      Carpio, Edward A.; Ponce Álvarez, Silvia; Rodriguez, Juan M. (SPIE, 2023)
      Acceso restringido
      The lack of drinkable water in rural areas or in places affected by natural disasters, motivated us to develop an efficient way to obtain drinking water. In this work we will present the development of an autonomous and ...
    • Effect of y-irradiation on the growth of ZnO nanorod films for photocatalytic disinfection of contaminated water 

      Alarcón, Julio; Ponce Álvarez, Silvia; Paraguay Delgado, Francisco; Rodríguez Rodríguez, Juan (Academic Press, 2011)
      Acceso restringido
      The growth of ZnO nanorods on a flat substrate containing c-irradiated seeds and their ability to photocatalytically eliminate bacteria in water were studied. The seed layer was obtained, by the spray pyrolysis technique, ...
    • Elimination of Escherichia coli in Water Using Cobalt Ferrite Nanoparticles: Laboratory and Pilot Plant Experiments 

      Gastelo, Elmer; Montes de Oca, Juan; Carpio Deza, Edward; Espinoza, Juan; García, Pilar; Ponce Álvarez, Silvia; Rodriguez, Juan Martín (Multidisciplinary Digital Publishing Institute, 2019)
      Acceso abierto
      This paper focuses on the synthesis of cobalt ferrite nanoparticles by the sol–gel method and their photocatalytic activity to eliminate bacteria in aqueous media at two di erent scales: in a laboratory reactor and a ...
    • Influence of Pyrolytic Seeds on ZnO Nanorod Growth Onto Rigid Substrates for Photocatalytic Abatement of Escherichia coli in water 

      Sánchez, Luis; Guz, Lucas; García, Pilar; Ponce Álvarez, Silvia; Goyanes, Silvia; Marchi, María Claudia; Candal, Roberto; Estrada, Walter; Rodríguez Rodríguez, Juan (IWA Publishing, 2014)
      Acceso restringido
      ZnO nanorods (ZnO NRs) were grown on ZnO seeded fluorine doped tin oxide (FTO) substrates at low temperatures (90 °C) from Zn2+ precursors in alkaline aqueous solution. The ZnO seeds were deposited on the FTO substrate ...
    • Study of the mechanical and energetic properties of pellets produce from agricultural biomass of quinoa, beans, oat, cattail and wheat 

      Alarcón, M.; Santos, C.; Cevallos, M.; Eyzaguirre Pérez, Raúl; Ponce Álvarez, Silvia (Springer, 2017)
      Acceso restringido
      The lack of conventional fuels in rural areas in Peru drives people to burn agricultural wastes that are used as fuel. Burning these wastes produce a large amount of gaseous pollutants that harm the health of ...
    • Synthesis and Characterization of ZnO Nanorod Films on PET for Photocatalytic Disinfection of Water 

      Sánchez, Luis; Guz, Lucas; García, Pilar; Ponce Álvarez, Silvia; Goyanes, Silvia; Marchi, María Claudia; Candal, Roberto; Rodríguez Rodríguez, Juan (Science & Technology Network, Inc., 2015)
      Acceso abierto
      ZnO nanorods (ZnO NRs) were grown on ZnO seeded polyethylene tert-phtalate (PET) substrates obtained from recycled soda bottles at low temperatures (90 °C) from Zn2+ precursors in alkaline aqueous solution. The ZnO seeds ...
    • The Applicability of Cellulose - Tara Gum Composite Hydrogels as Dye Capture Adsorbents 

      Gomez-Maldonado, Diego; Ponce Álvarez, Silvia; Peresin, Maria S. (Springer Science and Business Media Deutschland GmbH, 2022)
      Acceso restringido
      There is a growing interest in using naturally derived materials to generate adsorbent materials that can improve water quality by removing industrially derived pollutants such as dyes. In this work, composite beads were ...
    • The role of seeding in the morphology and wettability of ZnO nanorods films on different substrates 

      Rodríguez Rodríguez, Juan; Onna, Diego; Sánchez, Luis; Marchi, María Claudia; Candal, Roberto; Ponce Álvarez, Silvia; Bilmes, Sara A. (Elsevier BV, 2013)
      Acceso restringido
      Spray pyrolysis (SP) and spray-gel (SG) techniques were used to deposit ZnO seeds on Fluor doped tin oxide glasses (FTO), heated at 350 ¿C or 130 ¿C, and PET heated at 90 ¿C. The effect of seeding on the morphology and ...
    • TiO2 films on CoFe2O4 nanoparticles for the photocatalytic oxidation of rhodamine B: Influence of the alcoholic solutions 

      Gastello, Elmer; Estrada, David; Estrada, Walter; Luyo, Clemente; Espinoza, Juan; Ponce Álvarez, Silvia; Montes de Oca, Juan; Acosta, Dwight Roberto; Rodríguez, Juan M. (SPIE, 2019)
      Acceso restringido
      In the present work, photocatalytic oxidation of Rhodamine B solutions were performed using a composite material prepared by titanium dioxide films deposited onto cobalt ferrite nanoparticles. Cobalt ferrite nanoparticles ...
    • TiO2:Cex onto Al Clays for Photocatalytic Solar Water Disinfection 

      Belver, Carolina; Ponce Álvarez, Silvia; Carpio, Edward A.; Salazar, G.; García, Pilar A.; Bedia, Jorge; Alvárez Montero, M. A.; Rodriguez Jimenez, Juan J.; Rodríguez, Juan M. (Hindawi, 2020)
      Acceso abierto
      A novel methodology was employed to prepare new nanocomposites with photocatalytic properties based on Ce-doped TiO2 nanoparticles arranged over a layered silicate. The catalysts were porous materials formed by exfoliated ...
    • Treatment of irrigation water infested with nematodes using a solar photoreactor 

      Inga López, Jesarella; Meza Contreras, Víctor; Rodríguez Delfín, Alfredo; Ponce Álvarez, Silvia; Paredes Larroca, Fabricio Humberto; Quino Favero, Javier; Eyzaguirre Pérez, Raúl; Saettone Olschewski, Erich Arturo (Desalination Publications, 2020)
      Acceso restringido
      The objective of this study was to assess the efficacy of the disinfection of irrigation water loaded with the plant-parasitic nematode Meloidogyne incognita using a solar photoreactor. The photoreactor was comprised of a ...
    • Ultraviolet concentration factor of a truncated compound parabolic concentrator under different weather conditions 

      Saettone Olschewski, Erich Arturo; Paredes Larroca, Fabricio Humberto; Quino Favero, Javier; Ponce Álvarez, Silvia; Eyzaguirre Pérez, Raúl (Pleiades Publishing, 2020)
      Acceso restringido
      This study presents the results of ultraviolet radiation measurement in a truncated compound parabolic concentrator. The measurements were performed by using of a portable ultraviolet sensor both inside and outside the ...
    • ZnO (Ag-N) Nanorods Films Optimized for Photocatalytic Water Purification 

      Sanchez, Luis; Castillo, Carlos; Cruz, Willy; Yauri, Bryan; Sosa, Miguel; Luyo, Clemente; Candal, Roberto Jorge; Ponce Álvarez, Silvia; Rodríguez, Juan M. (Multidisciplinary Digital Publishing Institute, 2019)
      Acceso abierto
      ZnO nanorods (NRs) films, nitrogen-doped (ZnO:N), and ZnO doped with nitrogen and decorated with silver nanostructures (ZnO:N-Ag) NRs films were vertically supported on undoped and N doped ZnO seed layers by a wet chemical ...