Percorrer por autor "Cardoso, Jonathan"
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- Analysis of the feasibility of the use as fertilizers, of leachates from a mechanical biological treatment plant for municipal solid wastePublication . Cardoso, Jonathan; Rodrigues, Bárbara; Gomes, Helder; Brito, PauloThe main environmental issue associated with the compost production is the production of a liquid leachate. However, compost leachate may also be considered as a source of nutrients and used as fertilizer. Chemical properties were determined for a raw leachate from a mechanical biological treatment plant for municipal solid waste, to check if it meets the adequate requirements for using as commercial fertilizer according to the proposal of regulation of the European Parliament of 2016, for fertilizers. This study intends to access if the leachate can be used as potential source for fertilizers. It qualitatively meets the requirements established for the composition of commercial fertilizers and the production cost of leachate as raw material is low. Preliminary results showed low concentrations of heavy metals and suitable amounts of nutrients after the concentration of the leachate by simple batch distillation.
- Analysis of the feasibility of the use as fertilizers, of leachates from a mechanical biological treatment plant for municipal solid wastePublication . Cardoso, Jonathan; Rodrigues, Bárbara; Gomes, Helder; Brito, PauloThe main environmental issue associated with the compost production is the production of a liquid leachate. Therewith, compost leachate may also be considered as a source of nutrients and used as fertilizer. The main pollution issue associated with this compost treatment is the production of a liquid leachate that is characterized by high organic load. Although municipal waste compost leachate is one of the problems of compost production, it may be considered as a source of nutrients. Compost leachate from municipal wastes contains carbon, nitrogen, phosphorus, potassium and trace elements that can be used as nutrients by plants. The advantages of the use of organic wastes such as compost leachate as fertilizers are evident. Their use would reduce the consumption of commercial fertilizers which need in their production high cost and energy. Leachate is a waste product, which means that no direct production costs are associated. The use of leachate in agriculture also means that the costs at waste treatment plants can be reduced, since processes for nitrogen and phosphorus removal would not be necessary. In that point of view, this work aims to determine the chemical properties for a raw leachate from a mechanical biological treatment plant for municipal solid waste, to check if it meets the adequate requirements for using as commercial fertilizer according to the proposal of regulation of the European Parliament of 2016, for fertilizers. This study intends to assess if the leachate can be used as potential source for fertilizers. It qualitatively meets the requirements established for the composition of commercial fertilizers and the production cost of leachate as raw material is low. Preliminary results showed low concentrations of heavy metals and suitable amounts of nutrients after the concentration of the leachate by simple batch distillation.
- Application of adsorbent materials to remove heavy metals in leachate from a municipal landfill treatment plantPublication . Cardoso, Jonathan; Fernández Delgado, Marina; Vertonha, Maria T.; Cabral, David; Silva, Adriano S.; Roman, Fernanda; Díaz de Tuesta, Jose Luis; Arrobas, Margarida; Coca, Mónica; Brito, Paulo; Gomes, HelderTo treat and reduce the heavy metals content in leachate byproducts from biological treatment in a waste treatment plant, adsorption is one of the most efficient techniques is the focus discussed in this work due the composition of those liquids which contains nutrients but also hazards. The use of different adsorbents such as activated carbon, clays, and ion-exchange resins, is studied to adequate requirements for use as commercial fertiliser according to the regulations. This study concluded that the TOC presented in the leachate fulfil the EU requirements after a simple concentration process. The experimental design results obtained for heavy metals removal from the leachate show that a suitable combination of pH of 9 and ion exchange resins, especially Lewatit TP207 with a mass ratio of 0.4 g of resin per 20 mL of leachate, could reach the heavy metal content objectives. However, the leachate cannot be used as a commercial fertiliser using only this treatment because of the lack of Cr VI specific determination, which requires a crucial and deeper study, using as a starting point the optimal conditions obtained in this work.
- Development of polyethersulphone mixed matrix zeolite membranes functionalized with ionic liquids and deep eutectic solvents for CO2 separationPublication . Cardoso, Jonathan; Lin, Zhi; Brito, Paulo; Gando-Ferreira, Licínio M.Mixed matrix membranes (MMM) combine the flexibility of polymers and the strength and durability presented by inorganic solids
- Development of Polyethersulphone Mixed Matrix Zeolite Membranes Functionalized with Ionic Liquids and Deep Eutectic Solvents for CO2 SeparationPublication . Cardoso, Jonathan; Lin, Zhi; Brito, Paulo; Ferreira, LicínioMixed matrix membranes (MMM) combine the flexibility of polymers and the strength and durability presented by inorganic solids. In an economically point of view, the advantages of membrane separation are low capital investment and space requirements, high process flexibility and lower energy consumption, helping for a more cost-effective separation process and providing a high separation degree. The molecular sieves based on nano-sized silicoaluminophosphates (SAPO) appear as one of the main materials in MMM for gas separation because the pore size of chabazite (CHA) (0.38 nm) is near the kinetic diameter of gases like H2 (0.29 nm), CO2 (0.33 nm), N2 (0.36 nm), CO (0.37 nm), CH4 (0.38 nm) and reduced crystal size improves the dispersion and decreases interfacial defects. Doping SAPO-34 are intended to increase the potential of these solids. The use of isomorphic substitution by transition metals (Fe, Ni, Co, Mn), results in materials with different acidity that differ from the original SAPO in interactions with other compounds. Besides, the addition of ionic liquids (IL) or Deep Eutectic Solvents (DES) with high affinity and selectivity to CO2, onto the particle surface and then dispersing it in a polymer membrane can enhance the separation characteristics, resulting in better permeation and selectivity properties.
- Enhancing CO2/N2 and CO2/CH4 Separation Properties of PES/SAPO-34 Membranes Using Choline Chloride-Based Deep Eutectic Solvents as AdditivesPublication . Cardoso, Jonathan; Lin, Zhi; Brito, Paulo; Gando-Ferreira, Licínio M.CO2 separation is an important environmental method mainly used in reducing CO2 emissions to mitigate anthropogenic climate change. The use of mixed-matrix membranes (MMMs) arrives as a possible answer, combining the high selectivity of inorganic membranes with high permeability of organic membranes. However, the combination of these materials is challenging due to their opposing nature, leading to poor interactions between polymeric matrix and inorganic fillers. Many additives have been tested to reduce interfacial voids, some of which showed potential in dealing with compatibility problems, but most of them lack further studies and optimization. Deep eutectic solvents (DESs) have emerged as IL substitutes since they are cheaper and environmentally friendly. Choline chloride-based deep eutectic solvents were studied as additives in polyethersulfone (PES)/SAPO-34 membranes to improve CO2 permeability and CO2/N2 and CO2/CH4 selectivity. SAPO-34 crystals of 150 nm with a high surface area and microporosity were synthesized using dry-gel methodology. The PES/SAPO-34 membranes were optimized following previous work and used in a defined composition, using 5 or 10 w/w% of DES during membrane preparation. All MMMs were characterized by their ideal gas permeability using N2 and CO2 pure gasses. Selected membranes were also tested using CH4 pure gas. The results presented that 5 w/w%, in polymer mass, of ChCl–glycerol presented the best result over the synthesized membranes. An increase of 200% in CO2 permeability maintains the CO2/N2 selectivity for the non-modified PES/SAPO-34 membrane. A CO2/CH4 selectivity of 89.7 was obtained in PES/SAPO-34/ChClglycerol membranes containing 5 w/w% of this DES, which is an outstanding ideal separation performance for MMMs when compared to other results in the literature. FTIR analysis reiterates the presence of glycerol in the membranes prepared. Dynamic Mechanical Thermal Analysis (DMTA) shows that the addition of 5 w/w% of DES does not impact the membrane flexibility or polymer structure. However, in concentrations higher than 10 w/w%, the inclusion of DES could lead to high membrane rigidification without impacting the overall thermal resistance. SEM analysis of DESenhanced membranes presented asymmetric final membranes and reaffirmed the results obtained in DMTA about rigidified structures and lower zeolite–polymer interaction with higher concentrations of DES.
- Heavy metals removal of leachates from a mechanical biological municipal solid waste treatment plant for use as fertilizersPublication . Cardoso, Jonathan; Vertonha, Maria Thais; Roman, Fernanda; Silva, Adriano S.; Díaz de Tuesta, Jose Luis; Brito, Paulo; Gomes, HelderLeachates produced from treatment plants contains carbon, nitrogen, phosphorus, potassium and trace elements. This work aims to develop heavy metals removal processes using solid adsorbents synthetized at CIMO and LSRE-LCM laboratories at Polytechnic Institute of Bragança, such as activated carbon produced from a compost material from the same treatment plant and modified clays obtained through a partnership with a Kazakhstan institution, to adequate the leachate from the composting line of a mechanical and biological treatment facility, into commercial fertilizers which fit the requirements of the European Legislation. Preliminary results show that the adsoption materials promoted a reduction in the heavy metals content, but this reduction also affected the organic carbon content. However, the activated carbons presented a better potencial for heavy metals removal.
- Heavy metals removal of leachates from a mechanical biological municipal solid waste treatment plant for use as fertilizersPublication . Cardoso, Jonathan; Vertonha, Maria Thais; Roman, Fernanda; Silva, Adriano S.; Díaz de Tuesta, Jose Luis; Brito, Paulo; Gomes, HelderLeachates produced from treatment plants contains carbon, nitrogen, phosphorus, potassium and trace elements. This work aims to develop heavy metals removal processes using solid adsorbents synthetized at CIMO and LSRE-LCM laboratories at Polytechnic Institute of Bragança, such as activated carbon produced from a compost material from the same treatment plant and modified clays obtained through a partnership with a Kazakhstan institution, to adequate the leachate from the composting line of a mechanical and biological treatment facility, into commercial fertilizers which fit the requirements of the European Legislation. Preliminary results show that the adsoption materials promoted a reduction in the heavy metals content, but this reduction also affected the organic carbon content. However, the activated carbons presented a better potencial for heavy metals removal.
- Heavy metals removal on leachate for use as fertilizersPublication . Cardoso, Jonathan; Vertonha, Maria Thais; Cabral, David; Silva, Adriano S.; Roman, Fernanda; Díaz de Tuesta, Jose Luis; Arrobas, Margarida; Brito, Paulo; Gomes, HelderMunicipal landfill leachates typically contain high ammonium and organic concentration which could contribute to its use in agriculture, leading to the reduction of costs for the respective waste treatment plants. However, due to the nature of the leachates, they may contain phytotoxic substances. The landfillleachate samples differ by many factors such as the composition of the treated waste, elapsed time, geochemical and weather conditions [1-3]. Taking into account these considerations, leachate samples from a storage tank at the "Residuos do Nordeste, ElM" mechanical and biological treatment plant, were collected in February 2019, and stored :at 4°C. The leachate samples were processed using activated carbon adsorbents produced from the compost of the referred company, and H2S04 activated clays obtained from a partnership with a Kazakhsta1n institution. The leachate samples were mixed with the adsorbents for 48 hours, centrifugated and the supernatant was reserved. TOC analysis in a Shimadzu TOC-L equipment and metals quantification by atomic absorption spectroscopy using a Varian SpectrAA 220 apparatus were carried out. :Selected results are presented in Fig. 1. The original leachate presents an organic carbon content closer to the requirements of the EU legislation for liquid organo-mineral fertilizers. The activated carbon promoted greater TOC removal in comparison with the activated clays. Both materials showed interaction with the heavy metals. However, Cr still remains present in higher conten1ts and K presents lower values than the legislation requirements. Overall, the activated carbons presented a greater potential for heavy metals removal. However, ion-exchange resins will be tested for a more efficient heavy metals removal to minimize possible secondary elimination of components sue:h as nutrients and organic carbon.
- Influence of [emim][Tf2N] in PES/SAPO-34 mixed matrix membranes for gas separationPublication . Cardoso, Jonathan; Lin, Zhi; Brito, Paulo; Gando-Ferreira, Licínio M.Mixed matrix membranes (MMM) are heavily studied and the main concern by researchers is the difficulty to obtain a high selectivity membrane with low defects, mainly interfacial voids due to the poor interaction between polymer matrix and filler. The functionalization of zeolite surface in Poly-EtherSulphone (PES)/Silico-AluminoPhosphate-34 (SAPO- 34) led to membranes with higher compatibility. Recently, the use of ionic liquids in the particles surface to improve the gas permeability and separation efficiency has presented advanced results. The aim of this work is to compare the separation efficiency of CO2 and N2 in permeance and selectivity criteria. The use of the ionic liquid (IL) [emim][Tf2N] showed an increase in selectivity and in CO2 permeance due to promoting a better separation of the dispersant in the polymeric matrix when compared to a film with the same composition without the IL treatment.
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