Cecilia Panigatti - Academia.edu (original) (raw)
Papers by Cecilia Panigatti
Arsenic in the Environment - Proceedings, 2014
Hydrobiologia, 2003
ABSTRACT Water – Salvinia herzogii – sediment systems were exposed to different phosphorus and ni... more ABSTRACT Water – Salvinia herzogii – sediment systems were exposed to different phosphorus and nitrogen combinations in outdoor experiments. The aim was to estimate the amounts of P immobilized in macrophytes and sediments, as well as to elucidate whether or not the presence of N affects the retention of P. The following components were added: o-P, o-P + NH4+, o-P + NO3− + NH4+, o-P + NO3−. The concentration of nutrients was periodically determined throughout the experiment (28 days). The concentrations of P and N in plant tissues and sediments were determined at the beginning and the end of the experiment. Sequential extractions of P-fractions in sediment were performed using the EDTA method (Golterman, 1996). The removal efficiency of P in water was 95–99%. The removal of NH4+ (97–98%) was more effective than that of NO3− (44–86%). The presence of nitrogen species increased the removal velocity of o-P from water, NH4+ was the most effective species. Sediments not only had higher P removal rates than macrophytes but, in the control treatment without macrophytes, they reached the values obtained by macrophytes plus sediments in the other treatments. The adsorption of P takes place at the surface layer of the sediment (1 cm). Most of the P incorporated into the sediment during the experiment was sorbed by the fraction Fe(OOH)≍P. The addition of nutrients to water modified the leaves/lacinias weight ratio.
Hydrobiologia, 2002
The dynamics of phosphate in the Middle Paraná wetlands was studied by means of isotopic techniqu... more The dynamics of phosphate in the Middle Paraná wetlands was studied by means of isotopic technique. Laboratory reactors containing water–Paspalum repens–sediment and water–sediment were prepared in quadruplicate. Initially, 15 mg of P (as KH2PO4) and 15 µCi (microcurie) of 32P were added to water and sediment systems (5 l). Water samples were taken periodically and inorganic phosphate and radioactivity were determined. The total phosphorus concentration and 32P were determined on the initial and final sediment and plant samples. It was corroborated that there is a dynamic and continuous P-exchange among the various compartments of the aquatic system, which proves both the release of P from the sediment as well as the adsorption of P onto the sediment. The adsorption of P basically takes place at the surface layer of the sediment (1 cm). Paspalum repens is efficient in the P uptake, not only from the sediment through the roots, but also probably from water, through leaves and stems.
En este trabajo se realiza una valoración del proceso de enseñanza y aprendizaje durante el aisla... more En este trabajo se realiza una valoración del proceso de enseñanza y aprendizaje durante el aislamiento por Covid 19 en el área de Matemática correspondiente a las carreras de Ingeniería en la Facultad Regional Rafaela de la Universidad Tecnológica Nacional. Se brinda una discusión en base a diferentes investigaciones y propuestas llevadas a cabo en otras universidades del país y de Latinoamérica como consecuencia de la pandemia. A partir de allí, se establecen coincidencias y diferencias en esta problemática, desde múltiples miradas en los distintos contextos donde irrumpió un proceso de enseñanza y aprendizaje virtual mediado por tecnologías. Para efectuar este trabajo, además del análisis de las diferentes situaciones en distintas casas de estudio de nivel superior, se tomó como referencia las opiniones de docentes y alumnos que formaron parte de este proceso formativo en línea a través de una encuesta con un formulario. Asimismo, se complementó el trabajo con entrevistas a docen...
Fundamental and Applied Limnology, 1999
ABSTRACT A two-year study was carried out a) to describe the particular ecological situation in t... more ABSTRACT A two-year study was carried out a) to describe the particular ecological situation in the Parana River and its floodplain, b) to evaluate the role of Eichhornia crassipes (Mart.) Solms. (floating macrophyte) and Paspalum repens Berg. (rooted macrophyte) as nutrient reservoirs; c) to assess whether the lotic factor has an influence on the chemical characteristics of plants, and d) to study the influence of vegetation on the physicochemical quality of water. The importance of the E. crassipes rhizosphere as a nutrient retainer was demonstrated. E. crassipes absorbs soluble reactive phosphorus and ammonia for its development during the spring-summer period, but this floating plant has no influence on nutrient concentrations in water during the winter. P. repens had an influence on nutrient concentrations in the water, but a particular pattern of P.repens behaviour could not be established. In both environments, the aquatic plants studied had no significant influence on major ion concentrations in the water during the period considered (ANOVA, two-way, p < 0.05). Moving water has a positive influence upon the growth of P. repens. Sediment can be considered as the major nitrogen compartment, water being the second compartment in importance. Sediment must also be considered as the main reservoir for phosphorus, and the studied macrophytes as the next one.
Revista Aidis De Ingenieria Y Ciencias Ambientales, 2013
The study and construction of a septic tank-infiltration trench as a sewage treatment alternative... more The study and construction of a septic tank-infiltration trench as a sewage treatment alternative is proposed. It originates from a cesspool groundwater-contamination problem at Rafaela, Santa Fe, Argentina. Effluents from treatment outlets and the incidence of this system on surrounding groundwaters have been studied for three years. In the wastewater the following parameters were analyzed: pH, chemical oxygen demand (COD), biological oxygen demand (BOD5), Total Nitrogen, Phosphorus and Ammonia. In groundwater the following variables were studied: pH, total solids, chlorides, total hardness, calcium, magnesium, total alkalinity, sulfate, nitrite, nitrate, ammonium and arsenic. In both cases, bacterial determinations were performed.A house with no sewerage yet, was evaluated as case study, aiming to extend the system to neighborhood houses under similar conditions. A significant decrease in COD and BOD5 concentrations was found on the treated effluents. Nearby groundwater measurements, in turn, demonstrate treatment advantages, since no pollution by nitrates, nitrites, ammonia and fecal bacteria was detected.
Actualmente las industrias, incorporan tecnologías y procesos para mejorar la calidad de sus eflu... more Actualmente las industrias, incorporan tecnologías y procesos para mejorar la calidad de sus efluentes líquidos, con el objetivo de dar cumplimiento al marco legal ambiental. En el caso de las industrias alimenticias, dichos tratamientos generan una gran cantidad de barros de características orgánicas, los cuales se deben disponer de forma adecuada. Una de las alternativas para valorizar estos residuos y disminuir la contaminación que producen, es generar biogás y biofertilizante a partir de los mismos. El objetivo del trabajo es evaluar la digestión anaeróbica de fangos que se generan en el tratamiento primario de los efluentes de una industria láctea, junto con efluentes de una instalación de ordeño. Se diseña y construye un reactor anaeróbico a escala piloto de 1000 litros de capacidad y se llevan a cabo dos experiencias estudiando la codigestión de los residuos mencionados. Se concluye que es factible la codigestión combinada de un efluente de tambo y un residuo de tratamiento D...
Environmental Technology & Innovation
Abstract Water arsenic reduction for human consumption represents a global environmental challeng... more Abstract Water arsenic reduction for human consumption represents a global environmental challenge, and there is a wide variety of methods for its removal. The aim of this study was to investigate the kinetics and equilibrium of arsenic adsorption of a soil from Misiones province, Argentina The material used as adsorbent was a lateritic soil. Kinetics experiments were carried out. Adsorption was evaluated through isotherms, working with concentrations between 0.01 and 30.0 mg As.L−1. Initially, a rapid decrease in the concentration of arsenic was verified, determining an equilibrium time of 24 h. Batch studies results were modeling using Langmuir and Freundlich adsorption models. It was verifying a satisfactory approximation to the Langmuir isotherm, (R 2 = 0 .908). The adsorbent studied is considered efficient for arsenic removal and it could be used in isolated areas without potable water.
Environmental Technology, 2016
The aim of this work was to evaluate the influence of different substrates in the performance of ... more The aim of this work was to evaluate the influence of different substrates in the performance of a horizontal flow constructed wetland employed in dairy farm wastewater treatment. Typha domingensis was chosen for this study due to its high productivity and efficiency in nutrient removal. Fifteen microcosm-scale reactors simulating horizontal flow constructed wetlands were disposed in a greenhouse in triplicate. Five substrates (river gravel, gravel, LECA, river gravel + zeolite and gravel + zeolite) were evaluated. Real effluent with previous treatment was used. Dairy farm effluents favoured T. domingensis growth, probably due to their high nutrient concentrations. The treatments with the different substrates studied were efficient in the treatment of the dairy farm effluent obtaining ammonium ([Formula: see text]) and total phosphorus (TP) removals between 88-99% and 86-99%, respectively. Removal efficiencies were significantly higher in treatments using LECA and combined substrate (gravel + zeolite). After treatment, the quality of the final effluent was significantly improved. Outlet effluent complied with regulations and could be discharged into the environment.
Revista Aidis Vol 1 No 2 2007, Sep 13, 2011
International Journal of Environmental Research and Public Health, 2015
Actualmente las industrias, incorporan tecnologias y procesos para mejorar la calidad de sus eflu... more Actualmente las industrias, incorporan tecnologias y procesos para mejorar la calidad de sus efluentes liquidos, con el objetivo de dar cumplimiento al marco legal ambiental. En el caso de las industrias alimenticias, dichos tratamientos generan una gran cantidad de barros de caracteristicas organicas, los cuales se deben disponer de forma adecuada. Una de las alternativas para valorizar estos residuos y disminuir la contaminacion que producen, es generar biogas y biofertilizante a partir de los mismos. El objetivo del trabajo es evaluar la digestion anaerobica de fangos que se generan en el tratamiento primario de los efluentes de una industria lactea, junto con efluentes de una instalacion de ordeno . Se disena y construye un reactor anaerobico a escala piloto de 1000 litros de capacidad y se llevan a cabo dos experiencias estudiando la codigestion de los residuos mencionados. Se concluye que es factible la codigestion combinada de un efluente de tambo y un residuo de tratamiento ...
A way to generate a closer approach to science and technology, especially in young people, is the... more A way to generate a closer approach to science and technology, especially in young people, is the convocation for a scientific seminar in which students participate, advised by teachers, from different institutions of Rafaela city and area, of different educational levels. In UTN, Rafaela Regional Faculty, from 2012 until today, Physics, Chemistry and Informatics Seminars are held uninterruptedly; with the purpose of attain the diffusion of scientific knowledge. The students participate by showing scientific experiences, which are complemented by oral expositions of specialists. After the V Seminar, surveys to teachers and students were realized to know if the objective had been achieved. The results show a remarkable interest of students in the experimental sciences, approaching them to investigation and work exposition methodology, as well as to the interrelation with different schools and academic levels of Rafaela city and area.
En este trabajo se realiza una valoración del proceso de enseñanza y aprendizaje durante el aisla... more En este trabajo se realiza una valoración del proceso de enseñanza y aprendizaje durante el aislamiento por Covid 19 en el área de Matemática correspondiente a las carreras de Ingeniería en la Facultad Regional Rafaela de la Universidad Tecnológica Nacional. Se brinda una discusión en base a diferentes investigaciones y propuestas llevadas a cabo en otras universidades del país y de Latinoamérica como consecuencia de la pandemia. A partir de allí, se establecen coincidencias y diferencias en esta problemática, desde múltiples miradas en los distintos contextos donde irrumpió un proceso de enseñanza y aprendizaje virtual mediado por tecnologías. Para efectuar este trabajo, además del análisis de las diferentes situaciones en distintas casas de estudio de nivel superior, se tomó como referencia las opiniones de docentes y alumnos que formaron parte de este proceso formativo en línea a través de una encuesta con un formulario. Asimismo, se complementó el trabajo con entrevistas a docen...
En este trabajo se realiza una valoración del proceso de enseñanza y aprendizaje durante el ais... more En este trabajo se realiza una valoración del proceso de enseñanza y aprendizaje durante el aislamiento por Covid 19 en el área de Matemática correspondiente a las carreras de Ingeniería en la Facultad Regional Rafaela de la Universidad Tecnológica Nacional. Se brinda una discusión en base a diferentes investigaciones y propuestas llevadas a cabo en otras universidades del país y de Latinoamérica como consecuencia de la pandemia. A partir de allí, se establecen coincidencias y diferencias en esta problemática, desde múltiples miradas en los distintos contextos donde irrumpió un proceso de enseñanza y aprendizaje virtual mediado por tecnologías. Para efectuar este trabajo, además del análisis de las diferentes situaciones en distintas casas de estudio de nivel superior, se tomó como referencia las opiniones de docentes y alumnos que formaron parte de este proceso formativo en línea a través de una encuesta con un formulario. Asimismo, se complementó el trabajo co...
Arsenic in the Environment - Proceedings, 2014
Hydrobiologia, 2003
ABSTRACT Water – Salvinia herzogii – sediment systems were exposed to different phosphorus and ni... more ABSTRACT Water – Salvinia herzogii – sediment systems were exposed to different phosphorus and nitrogen combinations in outdoor experiments. The aim was to estimate the amounts of P immobilized in macrophytes and sediments, as well as to elucidate whether or not the presence of N affects the retention of P. The following components were added: o-P, o-P + NH4+, o-P + NO3− + NH4+, o-P + NO3−. The concentration of nutrients was periodically determined throughout the experiment (28 days). The concentrations of P and N in plant tissues and sediments were determined at the beginning and the end of the experiment. Sequential extractions of P-fractions in sediment were performed using the EDTA method (Golterman, 1996). The removal efficiency of P in water was 95–99%. The removal of NH4+ (97–98%) was more effective than that of NO3− (44–86%). The presence of nitrogen species increased the removal velocity of o-P from water, NH4+ was the most effective species. Sediments not only had higher P removal rates than macrophytes but, in the control treatment without macrophytes, they reached the values obtained by macrophytes plus sediments in the other treatments. The adsorption of P takes place at the surface layer of the sediment (1 cm). Most of the P incorporated into the sediment during the experiment was sorbed by the fraction Fe(OOH)≍P. The addition of nutrients to water modified the leaves/lacinias weight ratio.
Hydrobiologia, 2002
The dynamics of phosphate in the Middle Paraná wetlands was studied by means of isotopic techniqu... more The dynamics of phosphate in the Middle Paraná wetlands was studied by means of isotopic technique. Laboratory reactors containing water–Paspalum repens–sediment and water–sediment were prepared in quadruplicate. Initially, 15 mg of P (as KH2PO4) and 15 µCi (microcurie) of 32P were added to water and sediment systems (5 l). Water samples were taken periodically and inorganic phosphate and radioactivity were determined. The total phosphorus concentration and 32P were determined on the initial and final sediment and plant samples. It was corroborated that there is a dynamic and continuous P-exchange among the various compartments of the aquatic system, which proves both the release of P from the sediment as well as the adsorption of P onto the sediment. The adsorption of P basically takes place at the surface layer of the sediment (1 cm). Paspalum repens is efficient in the P uptake, not only from the sediment through the roots, but also probably from water, through leaves and stems.
En este trabajo se realiza una valoración del proceso de enseñanza y aprendizaje durante el aisla... more En este trabajo se realiza una valoración del proceso de enseñanza y aprendizaje durante el aislamiento por Covid 19 en el área de Matemática correspondiente a las carreras de Ingeniería en la Facultad Regional Rafaela de la Universidad Tecnológica Nacional. Se brinda una discusión en base a diferentes investigaciones y propuestas llevadas a cabo en otras universidades del país y de Latinoamérica como consecuencia de la pandemia. A partir de allí, se establecen coincidencias y diferencias en esta problemática, desde múltiples miradas en los distintos contextos donde irrumpió un proceso de enseñanza y aprendizaje virtual mediado por tecnologías. Para efectuar este trabajo, además del análisis de las diferentes situaciones en distintas casas de estudio de nivel superior, se tomó como referencia las opiniones de docentes y alumnos que formaron parte de este proceso formativo en línea a través de una encuesta con un formulario. Asimismo, se complementó el trabajo con entrevistas a docen...
Fundamental and Applied Limnology, 1999
ABSTRACT A two-year study was carried out a) to describe the particular ecological situation in t... more ABSTRACT A two-year study was carried out a) to describe the particular ecological situation in the Parana River and its floodplain, b) to evaluate the role of Eichhornia crassipes (Mart.) Solms. (floating macrophyte) and Paspalum repens Berg. (rooted macrophyte) as nutrient reservoirs; c) to assess whether the lotic factor has an influence on the chemical characteristics of plants, and d) to study the influence of vegetation on the physicochemical quality of water. The importance of the E. crassipes rhizosphere as a nutrient retainer was demonstrated. E. crassipes absorbs soluble reactive phosphorus and ammonia for its development during the spring-summer period, but this floating plant has no influence on nutrient concentrations in water during the winter. P. repens had an influence on nutrient concentrations in the water, but a particular pattern of P.repens behaviour could not be established. In both environments, the aquatic plants studied had no significant influence on major ion concentrations in the water during the period considered (ANOVA, two-way, p < 0.05). Moving water has a positive influence upon the growth of P. repens. Sediment can be considered as the major nitrogen compartment, water being the second compartment in importance. Sediment must also be considered as the main reservoir for phosphorus, and the studied macrophytes as the next one.
Revista Aidis De Ingenieria Y Ciencias Ambientales, 2013
The study and construction of a septic tank-infiltration trench as a sewage treatment alternative... more The study and construction of a septic tank-infiltration trench as a sewage treatment alternative is proposed. It originates from a cesspool groundwater-contamination problem at Rafaela, Santa Fe, Argentina. Effluents from treatment outlets and the incidence of this system on surrounding groundwaters have been studied for three years. In the wastewater the following parameters were analyzed: pH, chemical oxygen demand (COD), biological oxygen demand (BOD5), Total Nitrogen, Phosphorus and Ammonia. In groundwater the following variables were studied: pH, total solids, chlorides, total hardness, calcium, magnesium, total alkalinity, sulfate, nitrite, nitrate, ammonium and arsenic. In both cases, bacterial determinations were performed.A house with no sewerage yet, was evaluated as case study, aiming to extend the system to neighborhood houses under similar conditions. A significant decrease in COD and BOD5 concentrations was found on the treated effluents. Nearby groundwater measurements, in turn, demonstrate treatment advantages, since no pollution by nitrates, nitrites, ammonia and fecal bacteria was detected.
Actualmente las industrias, incorporan tecnologías y procesos para mejorar la calidad de sus eflu... more Actualmente las industrias, incorporan tecnologías y procesos para mejorar la calidad de sus efluentes líquidos, con el objetivo de dar cumplimiento al marco legal ambiental. En el caso de las industrias alimenticias, dichos tratamientos generan una gran cantidad de barros de características orgánicas, los cuales se deben disponer de forma adecuada. Una de las alternativas para valorizar estos residuos y disminuir la contaminación que producen, es generar biogás y biofertilizante a partir de los mismos. El objetivo del trabajo es evaluar la digestión anaeróbica de fangos que se generan en el tratamiento primario de los efluentes de una industria láctea, junto con efluentes de una instalación de ordeño. Se diseña y construye un reactor anaeróbico a escala piloto de 1000 litros de capacidad y se llevan a cabo dos experiencias estudiando la codigestión de los residuos mencionados. Se concluye que es factible la codigestión combinada de un efluente de tambo y un residuo de tratamiento D...
Environmental Technology & Innovation
Abstract Water arsenic reduction for human consumption represents a global environmental challeng... more Abstract Water arsenic reduction for human consumption represents a global environmental challenge, and there is a wide variety of methods for its removal. The aim of this study was to investigate the kinetics and equilibrium of arsenic adsorption of a soil from Misiones province, Argentina The material used as adsorbent was a lateritic soil. Kinetics experiments were carried out. Adsorption was evaluated through isotherms, working with concentrations between 0.01 and 30.0 mg As.L−1. Initially, a rapid decrease in the concentration of arsenic was verified, determining an equilibrium time of 24 h. Batch studies results were modeling using Langmuir and Freundlich adsorption models. It was verifying a satisfactory approximation to the Langmuir isotherm, (R 2 = 0 .908). The adsorbent studied is considered efficient for arsenic removal and it could be used in isolated areas without potable water.
Environmental Technology, 2016
The aim of this work was to evaluate the influence of different substrates in the performance of ... more The aim of this work was to evaluate the influence of different substrates in the performance of a horizontal flow constructed wetland employed in dairy farm wastewater treatment. Typha domingensis was chosen for this study due to its high productivity and efficiency in nutrient removal. Fifteen microcosm-scale reactors simulating horizontal flow constructed wetlands were disposed in a greenhouse in triplicate. Five substrates (river gravel, gravel, LECA, river gravel + zeolite and gravel + zeolite) were evaluated. Real effluent with previous treatment was used. Dairy farm effluents favoured T. domingensis growth, probably due to their high nutrient concentrations. The treatments with the different substrates studied were efficient in the treatment of the dairy farm effluent obtaining ammonium ([Formula: see text]) and total phosphorus (TP) removals between 88-99% and 86-99%, respectively. Removal efficiencies were significantly higher in treatments using LECA and combined substrate (gravel + zeolite). After treatment, the quality of the final effluent was significantly improved. Outlet effluent complied with regulations and could be discharged into the environment.
Revista Aidis Vol 1 No 2 2007, Sep 13, 2011
International Journal of Environmental Research and Public Health, 2015
Actualmente las industrias, incorporan tecnologias y procesos para mejorar la calidad de sus eflu... more Actualmente las industrias, incorporan tecnologias y procesos para mejorar la calidad de sus efluentes liquidos, con el objetivo de dar cumplimiento al marco legal ambiental. En el caso de las industrias alimenticias, dichos tratamientos generan una gran cantidad de barros de caracteristicas organicas, los cuales se deben disponer de forma adecuada. Una de las alternativas para valorizar estos residuos y disminuir la contaminacion que producen, es generar biogas y biofertilizante a partir de los mismos. El objetivo del trabajo es evaluar la digestion anaerobica de fangos que se generan en el tratamiento primario de los efluentes de una industria lactea, junto con efluentes de una instalacion de ordeno . Se disena y construye un reactor anaerobico a escala piloto de 1000 litros de capacidad y se llevan a cabo dos experiencias estudiando la codigestion de los residuos mencionados. Se concluye que es factible la codigestion combinada de un efluente de tambo y un residuo de tratamiento ...
A way to generate a closer approach to science and technology, especially in young people, is the... more A way to generate a closer approach to science and technology, especially in young people, is the convocation for a scientific seminar in which students participate, advised by teachers, from different institutions of Rafaela city and area, of different educational levels. In UTN, Rafaela Regional Faculty, from 2012 until today, Physics, Chemistry and Informatics Seminars are held uninterruptedly; with the purpose of attain the diffusion of scientific knowledge. The students participate by showing scientific experiences, which are complemented by oral expositions of specialists. After the V Seminar, surveys to teachers and students were realized to know if the objective had been achieved. The results show a remarkable interest of students in the experimental sciences, approaching them to investigation and work exposition methodology, as well as to the interrelation with different schools and academic levels of Rafaela city and area.
En este trabajo se realiza una valoración del proceso de enseñanza y aprendizaje durante el aisla... more En este trabajo se realiza una valoración del proceso de enseñanza y aprendizaje durante el aislamiento por Covid 19 en el área de Matemática correspondiente a las carreras de Ingeniería en la Facultad Regional Rafaela de la Universidad Tecnológica Nacional. Se brinda una discusión en base a diferentes investigaciones y propuestas llevadas a cabo en otras universidades del país y de Latinoamérica como consecuencia de la pandemia. A partir de allí, se establecen coincidencias y diferencias en esta problemática, desde múltiples miradas en los distintos contextos donde irrumpió un proceso de enseñanza y aprendizaje virtual mediado por tecnologías. Para efectuar este trabajo, además del análisis de las diferentes situaciones en distintas casas de estudio de nivel superior, se tomó como referencia las opiniones de docentes y alumnos que formaron parte de este proceso formativo en línea a través de una encuesta con un formulario. Asimismo, se complementó el trabajo con entrevistas a docen...
En este trabajo se realiza una valoración del proceso de enseñanza y aprendizaje durante el ais... more En este trabajo se realiza una valoración del proceso de enseñanza y aprendizaje durante el aislamiento por Covid 19 en el área de Matemática correspondiente a las carreras de Ingeniería en la Facultad Regional Rafaela de la Universidad Tecnológica Nacional. Se brinda una discusión en base a diferentes investigaciones y propuestas llevadas a cabo en otras universidades del país y de Latinoamérica como consecuencia de la pandemia. A partir de allí, se establecen coincidencias y diferencias en esta problemática, desde múltiples miradas en los distintos contextos donde irrumpió un proceso de enseñanza y aprendizaje virtual mediado por tecnologías. Para efectuar este trabajo, además del análisis de las diferentes situaciones en distintas casas de estudio de nivel superior, se tomó como referencia las opiniones de docentes y alumnos que formaron parte de este proceso formativo en línea a través de una encuesta con un formulario. Asimismo, se complementó el trabajo co...