Exploració per autor "Valderrama Ángel, César Alberto"
Ara es mostren els items 97-116 de 157
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Phosphate recovery from aqueous solution by K-zeolite synthesized from fly ash for subsequent valorisation as slow release fertilizer
Hermassi, Mehrez; Valderrama Ángel, César Alberto; Querol, Xavier; Harrouch Batis, Narjes; Cortina Pallás, José Luís (Elsevier, 2020-08-20)
Article
Accés obertThe sorption of phosphate by K-zeolites synthesized from fly ash (FA) by hydrothermal conversion is investigated in this study. The aim is the synthesis of Ca bearing K-zeolites to recover phosphate from urban and industrial ... -
Phosphate recovery from treated municipal wastewater using hybrid anion exchangers containing hydrated ferric oxide nanoparticles
You Chen, Xialei; Valderrama Ángel, César Alberto; Soldatov, V.; Cortina Pallás, José Luís (2017-08-07)
Article
Accés obertBACKDROUND This study presents the evaluation of two ion exchangers (granular and fibrous) impregnated with nanoparticles of hydrated ferric oxide (HFO) as selective sorbents for phosphate recovery from aqueous solutions. ... -
Phosphate removal from aqueous solution using a hybrid impregnated polymeric sorbent containing hydrated ferric oxide (HFO)
You Chen, Xialei; Guaya Caraguay, Diana Elizabeth; Farran Marsà, Adriana; Valderrama Ángel, César Alberto; Cortina Pallás, José Luís (2016-03-01)
Article
Accés obertBACKGROUND: This study evaluated a polymeric ion exchanger impregnated with nanoparticles of hydrated ferric oxide as a selective sorbent for anionic P(V) species. The hybrid impregnated anion exchanger (HAIX) employed as ... -
Phosphate removal from aqueous solutions using a hybrid fibrous exchanger containing hydrated ferric oxide nanoparticles
You Chen, Xialei; Farran Marsà, Adriana; Guaya Caraguay, Diana Elizabeth; Valderrama Ángel, César Alberto; Cortina Pallás, José Luís; Soldatov, V. (2016)
Article
Accés obertThis study presents the evaluation of a fibrous ion exchanger impregnated with nanoparticles of hydrated ferric oxide (HFO) as a selective sorbent for phosphate. The hybrid impregnated anion exchanger (FIBAN-As) combines ... -
Polyelectrolyte multilayers modification of nanofiltration membranes to improve selective separation of mono- and multivalent cations in seawater brine
Reza Moradi, Mohammad; Pihlajamäki, Arto; Hesampour, Mehrdad; Figueira Alves, Mariana; Reig i Amat, Mònica; Cortina Pallás, José Luís; Valderrama Ángel, César Alberto; Mänttäri, Mika (Elsevier, 2024-02-05)
Article
Accés obertNowadays, brine produced in the Reverse Osmosis (RO) seawater desalination plants is a significant and largely untapped source of critical minerals and metals, which is usually discharged into the seas as wastewater. As a ... -
Polyphenols and their potential role to fight viral diseases: An overview
Montenegro Landivar, María Fernanda; Tapia Quirós, Paulina; Vecino Bello, Xanel; Reig i Amat, Mònica; Valderrama Ángel, César Alberto; Granados Juan, Mercè; Cortina Pallás, José Luís; Saurina, Javier (Elsevier, 2021-12)
Article
Accés obertFruits, vegetables, spices, and herbs are a potential source of phenolic acids and polyphenols. These compounds are known as natural by-products or secondary metabolites of plants, which are present in the daily diet and ... -
Potentiometric electronic tongue-flow injection analysis system for the monitoring of heavy metal biosorption processes
Wilson Masso, Deivy; del Valle, M.; Alegret, Salvador; Valderrama Ángel, César Alberto; Florido Pérez, Antonio (2012-05-15)
Article
Accés restringit per política de l'editorialAn automated flow injection potentiometric (FIP) system with electronic tongue detection (ET) is used for the monitoring of biosorption processes of heavy metals on vegetable wastes. Grape stalk wastes are used as biosorbent ... -
Powdered Ca-activated zeolite for phosphate removal from treated waste-water
Hermassi, Mehrez; Valderrama Ángel, César Alberto; Moreno Palmerola, Natalia; Font Piqueras, Oriol; Querol Carceller, Xavier; Batis, Narjes; Cortina Pallás, José Luís (2016-01-01)
Article
Accés obertBackground: A powdered zeolitic material synthesised from fly ash (FA) (NaP1-FA) and its calcium modified form (CaP1-NA) were studied as sorbent materials for the recovery of phosphate from treated waste-water effluents. ... -
Recovery and separation of valuable metals (copper and zinc) from acidic mine waters by ion-exchange resins
Vecino Bello, Xanel; Reig i Amat, Mònica; López Rodríguez, Julio; Valderrama Ángel, César Alberto; Gibert Agulló, Oriol; Cortina Pallás, José Luís (2019)
Text en actes de congrés
Accés obertMining wastewaters, containing heavy metals such as copper (Cu) and zinc (Zn), have a huge impact on the environment due to they are not biodegradable and tend to bioaccumulate in plants or living organisms. Therefore, in ... -
Recovery of ammonia from domestic wastewater effluents as liquid fertilizers by integration of natural zeolites and hollow fibre membrane contactors
Sancho Lacalle, Irene; Licon Bernal, Edxon Eduardo; Valderrama Ángel, César Alberto; de Arespacochaga, Nicolas; Lopez Palau, Silvia; Cortina Pallás, José Luís (2017-04-15)
Article
Accés obertThe integration of up-concentration processes to increase the efficiency of primary sedimentation, as a solution to achieve energy neutral wastewater treatment plants, requires further post-treatment due to the missing ... -
Recovery of ammonium and phosphate from treated urban wastewater by using potassium clinoptilolite impregnated hydrated metal oxides as N-P-K fertilizer
Guaya Caraguay, Diana Elizabeth; Hermassi, Mehrez; Valderrama Ángel, César Alberto; Farran Marsà, Adriana; Cortina Pallás, José Luís (2016-09-01)
Article
Accés obertA natural clinoptilolite in its potassium form (KNC) was modified by impregnation of hydrated metal oxides (HMO) of aluminium (III) (KAlC), iron (III) (KFeC) and manganese (IV) (KMnC) for the simultaneous ammonium and ... -
Recovery of ammonium by powder synthetic zeolites from wastewater effluents: optimization of the regeneration step
You Chen, Xialei; Valderrama Ángel, César Alberto; Querol Carceller, Xavier; Cortina Pallás, José Luís (2017-10-01)
Article
Accés obertNitrogen recovery and valorization is gaining interest due to the current need for nitrogen removal, so it is of great interest that ammonium-selective sorbents be evaluated. In this study, a zeolitic material synthesized ... -
Recovery of natural polyphenols from spinach and orange by-products by pressure-driven membrane processes
Montenegro Landivar, María Fernanda; Tapia Quirós, Paulina; Vecino Bello, Xanel; Reig i Amat, Mònica; Granados Juan, Mercè; Farran Marsà, Adriana; Cortina Pallás, José Luís; Saurina, Javier; Valderrama Ángel, César Alberto (Multidisciplinary Digital Publishing Institute (MDPI), 2022-06-28)
Article
Accés obertSpinach and orange by-products are well recognized for their health benefits due to the presence of natural polyphenols with antioxidant activity. Therefore, the demand to produce functional products containing polyphenols ... -
Recovery of nutrients (N-P-K) from potassium-rich sludge anaerobic digestion side-streams by integration of a hybrid sorption-membrane ultrafiltration process: Use of powder reactive sorbents as nutrient carriers
Hermassi, Mehrez; Valderrama Ángel, César Alberto; Gibert Agulló, Oriol; Moreno Palmerola, Natàlia; Querol Carceller, Xavier; Harrouch Batis, Narjes; Cortina Pallás, José Luís (2017-05-05)
Article
Accés obertHere, an alternative nutrient (N-P-K) recovery route from potassium-rich sludge anaerobic digestion side-streams using powder reactive sorbents (PRSs) is presented. In the first step, the optimum PRS system was determined ... -
Recovery of polyphenols from agro-industries wastes: Extraction studies
Tapia Quirós, Paulina; Montenegro-Landivar, Maria Fernanda; Reig i Amat, Mònica; Vecino Bello, Xanel; Valderrama Ángel, César Alberto; Cortina Pallás, José Luís; Granados Juan, Mercè; Saurina, Javier (2019)
Comunicació de congrés
Accés obert -
Recovery of rare Earth elements from acidic mine waters by integration of a selective chelating ion-exchanger and a solvent impregnated resin
Hermassi, Mehrez; Granados Juan, Mercè; Ayora Ibañez, Carlos; Cortina Pallás, José Luís; Valderrama Ángel, César Alberto (Elsevier, 2021-10)
Article
Accés obertA polymeric ion-exchange resin, incorporating methyl-amino-phosphonic (TP260) functionalities, and a solvent impregnated resin (SIR) incorporating tri-methylpentylphosphinic acid (TP272), were evaluated for the selective ... -
Recovery of rare earth elements from acidic mine waters: An unknown secondary resource
Valderrama Ángel, César Alberto; Cortina Pallás, José Luís; Granados Juan, Mercè; Ayora Ibañez, Carlos; Hermassi, Mehrez (Elsevier, 2022-03)
Article
Accés obertAcidic mine Drainage (AMD) is still considered one of the greatest mining sustainability challenges due to the large volumes of wastes generated and the high associated treatment cost. New regulation initiatives on sustainable ... -
Recovery of sulphuric acid and valuable metals (Zn, Cu and REE) from acidic mine waters using nanofiltration
López Rodríguez, Julio; Reig i Amat, Mònica; Vecino Bello, Xanel; Valderrama Ángel, César Alberto; Gibert Agulló, Oriol; Cortina Pallás, José Luís (2019)
Comunicació de congrés
Accés obertAcidic mine waters (AMWs) contains moderate concentrations of sulphuricacid, relatively high concentrations of metals (Al, Fe, Cu and Zn) and minor amounts or rare earth elements (REE). The established management routes ... -
RISCOS, SEGURETAT I TECNOLOGIA MEDIAMBIENTAL (Examen 2n quadrimestre, 1r parcial)
Valderrama Ángel, César Alberto (Universitat Politècnica de Catalunya, 2016-04-15)
Examen
Accés restringit a la comunitat UPC -
RISCOS, SEGURETAT I TECNOLOGIA MEDIAMBIENTAL (Examen 2n quadrimestre, 1r parcial)
Valderrama Ángel, César Alberto (Universitat Politècnica de Catalunya, 2014-04-08)
Examen
Accés restringit a la comunitat UPC