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Barcelona, Spain

Kabay N.,Ege University | Cortina J.L.,Polytechnic University of Catalonia | Cortina J.L.,Water Technology Center aqua | Trochimczuk A.,Wroclaw University of Technology | Streat M.,Imperial College London
Reactive and Functional Polymers

Interest in the development of solvent-impregnated resins (SIRs) and their applications for the separation of metal ions and organic compounds from water in the form of a hybrid polymeric adsorbent material has intensified over the past thirty years. SIRs are particulate adsorbers that possess a combination of the advantageous features of both liquid-liquid extraction and ion exchange and this renders them applicable to a wide range of potential liquid-solid separation and recovery processes. This paper reviews the extensive published literature on methods of synthesis of SIRs, attempts to stabilize hybrid solvent-impregnated resins and various applications of SIRs. © 2010 Elsevier Ltd. All rights reserved. Source

de Arespacochaga N.,Water Technology Center aqua | Valderrama C.,Polytechnic University of Catalonia | Mesa C.,Water Technology Center aqua | Bouchy L.,Aqualogy | Cortina J.L.,Water Technology Center aqua
Chemical Engineering Journal

The most harmful biogas contaminant for energy conversion equipment such as fuel cells is hydrogen sulphide (H2S); thus efficient and cost-effective treatment systems for this compound should be designed and developed. A pilot-scale biotrickling filter (BTF) working in acidic media (pH=1.5-2) was operated for raw sewage biogas desulphurisation. Its operational performance as a function of two key important process parameters (temperature and retention time) was evaluated through short-term experimentation; showing that H2S removal efficiencies greater than 90% can be obtained at temperatures of 30°C, retention times of 80-85s and H2S Loading Rates of 210gH2S/(m3bedh). The system was afterwards operated for 924h and showed an average elimination capacity of 169gH2S/(m3bedh) at an average removal efficiency of 84%. The unit proved to be reversible to the effect of operation disruptions (lack of temperature control, limitations on oxygen supply), which were introduced to simulate possible system miss functioning or operational failures. Nevertheless, partial oxidation to elemental sulphur (S(s)) accounted for 70% of H2S removal progressively increasing the pressure drop over the column; reducing the availability of the treatment line and eventually leading to fuel cell shutdowns. More efficient systems for oxygen supply and solids removal are the key factors to be addressed for a sustainable deployment of BTF technology in waste water treatment plants (WWTP). © 2014 Elsevier B.V. Source

Valderrama C.,Polytechnic University of Catalonia | Granados R.,AUMA Consultants in Energy and Environment S.L. | Cortina J.L.,Polytechnic University of Catalonia | Cortina J.L.,Water Technology Center aqua | And 3 more authors.
Journal of Cleaner Production

A cement manufacturing company located in Catalonia (Spain) has upgraded its cement production plant. The new cement production line (L6) has replaced the former lines (L3, L4 and L5) which have been operating for 30 years. The new line production L6 has been designed and constructed taking into account the best available techniques (BAT) for the cement industry. The significant improvements achieved with the new plant are related to the energy efficiency of the new kiln system which represents less amount of fossil fuel and to less emission to the atmosphere per kg of clinker produced. Life-cycle assessment (LCA) methodology has been used for the quantification and evaluation of the environmental impacts of the new production line (L6) considering the designed goals proposed and those achieved at first trimester of 2011 compared to the former production lines. To reduce uncertainty this manuscript presents a cradle-to-gate life-cycle assessment of both scenarios. Analysis using SimaPro 7.2 software shows that new production line (L6) provides a significant reduction of the environmental impact for global warming (5%), acidification (15%), eutrophication (17%) and cumulative exergy demand (13%). The damage assessment also confirmed that new production line (L6) reported a significant reduction impact for the human health (11%), ecosystem quality (11%) and resources (14%) damage compared to the former lines. © 2011 Elsevier Ltd. All rights reserved. Source

Valderrama C.,Polytechnic University of Catalonia | Barios J.I.,Polytechnic University of Catalonia | Farran A.,Polytechnic University of Catalonia | Cortina J.L.,Polytechnic University of Catalonia | Cortina J.L.,Water Technology Center aqua
Water, Air, and Soil Pollution

Sorption equilibrium of phenol and aniline onto the granular activated carbon and hyperreticulated un-functionalized polymeric resin (MN200) was investigated in single and binary component aqueous systems. Higher loading was obtained for aniline than phenol onto both sorbents, which is probably due to hydrophobic difference between both solutes and the greater electronic density of the aromatic ring of the aniline. Granular activated carbon reported larger uptake than resin MN200 for both solutes, which may be attributed to the better physical properties of the granular activated carbon, for instance, larger surface area. The experimental sorption could be properly described by the Langmuir and Freundlich isotherms. Five models for predicting the binary equilibrium sorption isotherm were compared in order to determine the best fit model to correlate binary experimental data: the extended Langmuir isotherm with and without a constant interaction factor, a simplified model based on the single equilibrium factors, the empirical extended Freundlich isotherm and the modified extended Langmuir equation, which considers the synergistic interactions between sorbate-sorbate and not only the competition between them defined by the extended Langmuir model. The modified extended Langmuir model provides the best agreement between predicted and experimental data indicating that the synergistic interactions between solutes play an important role in the binary phenol/aniline sorption system. © 2009 Springer Science+Business Media B.V. Source

Valderrama C.,Polytechnic University of Catalonia | Barios J.I.,Polytechnic University of Catalonia | Caetano M.,Polytechnic University of Catalonia | Farran A.,Polytechnic University of Catalonia | And 2 more authors.
Reactive and Functional Polymers

Kinetic adsorption of phenol and aniline from aqueous solution onto activated carbon and hypercrosslinked polymeric resin MN200 were evaluated in single and binary system. Larger phenol and aniline uptakes were observed for activated carbon in single as well as binary system, which can be attributed to the better physical properties of activated carbon, for instance larger surface area and micropore area. The kinetic experimental data was properly fitted by the pseudo-first and pseudo-second-order rate equations. A synergetic effect between solutes was observed since phenol and aniline sorption kinetic in binary system was faster than the individual sorption of each solute in single system, as well as a slight increase in the kinetic parameters obtained in binary system. The particle diffusion rate was defined as the rate limiting mechanism in the singles and binary system for phenol and aniline kinetic adsorption on both adsorbents. Two steps were markedly defined by the Weber and Morris intraparticle diffusion analysis for phenol and aniline onto both adsorbents. In binary systems, the intraparticle diffusion was influenced by the physical properties of adsorbents. © 2009 Elsevier Ltd. All rights reserved. Source

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