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Contaminación de suelos dedicados al cultivo de papa por pesticidas
(Pontificia Universidad Católica del Perú, 1997)
Estudio para el diseño de un robot móvil autónomo para medición de contaminantes del aire y suelo en el corredor minero del sur
(Pontificia Universidad Católica del Perú, 2020-08-25)
La minería constituye el 10% del PBI del Perú; sin embargo, producto de sus actividades, el aire y el suelo aledaños se ven afectados. Este impacto en el medio ambiente provoca perjuicios en las comunidades contiguas al sobrepasarse los límites...
El cadmio, ¿su presencia nos alerta de la contaminación antropogénica?
(Pontificia Universidad Católica del Perú, 2019-11-26)
Cadmium is very scarce in nature and its presence in the environment is due to industrial development. Irresponsible waste management makes it appear in freshwaters and agricultural soils. It is very toxic and bioaccumulative, causing itai-itai disease....
El cadmio es muy escaso naturalmente y su presencia en el ambiente se debe al desarrollo industrial. La gestión irresponsable de sus residuos lo hace estar presente en aguas naturales y suelos agrícolas. Es muy tóxico y bioacumulable, y ocasiona la...
El cadmio es muy escaso naturalmente y su presencia en el ambiente se debe al desarrollo industrial. La gestión irresponsable de sus residuos lo hace estar presente en aguas naturales y suelos agrícolas. Es muy tóxico y bioacumulable, y ocasiona la...
Estudio del radón 222 y su progenie proveniente del suelo en la estación meteorológica Hipólito Unanue–PUCP
(Pontificia Universidad Católica del Perú, 2018-08-09)
El estudio de la presencia del gas radón y su progenie en sitios relacionados con
actividades de perforación de suelos como en ingeniería civil, arqueología, geología,
minería, etc. es de interés actual, considerando que los trabajos que se realizan...
Medición de radón en suelos de la ciudad de Lima durante el periodo 2016 - 2017
(Pontificia Universidad Católica del Perú, 2019-09-14)
promedio del gas radón en suelos de la ciudad de Lima. La concentración de radón se determinó utilizando el detector de trazas LR-115 tipo 2 durante 36 períodos, de 14 días cada uno, en veinte hoyos distribuidos en los quince distritos de la Ciudad de Lima...
Lima City is situated on alluvial fan deposits of rivers flowing through geological formations that contain different levels of uranium. In this paper, a study is made on the average spatial and temporal behavior of radon gas in soils of Lima City. Radon concentration was determined using the LR-115 type 2 track detector during 36 periods, of 14 days each, in twenty holes distributed in the fifteen districts of Lima City. Radon concentration in soil pores ranged from 0.1 to 64.3 kBq/m3 with an average value of 5.6 kBq/m3. The average radon concentration in soil gas was about two times lower in winter than in the other seasons. High radon values during October/November 2017 were related to the earthquakes perceived in Lima City in that period. The highest radon concentrations were found in areas of alluvial deposits whose parental material has been removed from the Quilmaná and Huarangal volcanics by the Chillón and Huaycoloro Rivers. Soil gas radon concentrations were even higher in areas closer to volcanic and less distant from rivers. During the period of maximum flooding of the Chillón, Rímac and Lurín rivers, due to the natural phenomenon “El Niño Costero”, anomalous high soil radon concentrations were observed in most of the measurement sites located near rivers. These high radon values were associated with ground vibrations caused by rock and debris avalanches in rivers and creeks....
Lima City is situated on alluvial fan deposits of rivers flowing through geological formations that contain different levels of uranium. In this paper, a study is made on the average spatial and temporal behavior of radon gas in soils of Lima City. Radon concentration was determined using the LR-115 type 2 track detector during 36 periods, of 14 days each, in twenty holes distributed in the fifteen districts of Lima City. Radon concentration in soil pores ranged from 0.1 to 64.3 kBq/m3 with an average value of 5.6 kBq/m3. The average radon concentration in soil gas was about two times lower in winter than in the other seasons. High radon values during October/November 2017 were related to the earthquakes perceived in Lima City in that period. The highest radon concentrations were found in areas of alluvial deposits whose parental material has been removed from the Quilmaná and Huarangal volcanics by the Chillón and Huaycoloro Rivers. Soil gas radon concentrations were even higher in areas closer to volcanic and less distant from rivers. During the period of maximum flooding of the Chillón, Rímac and Lurín rivers, due to the natural phenomenon “El Niño Costero”, anomalous high soil radon concentrations were observed in most of the measurement sites located near rivers. These high radon values were associated with ground vibrations caused by rock and debris avalanches in rivers and creeks....
Estudio e implementación de metodologías para el análisis de hidrocarburos policíclicos aromáticos en zonas remotas frías de los andes peruanos
(Pontificia Universidad Católica del Perú, 2013-10-01)
carácter hidrofóbico, y aumenta en suelos, debido a sus características químicas, esto también relacionado con la altitud, comprobando así la teoría del transporte translatitudinal o efecto de condensación fría.
Este trabajo también implementó una...
Cuantificación de la erosión hídrica en el Perú y los costos ambientales asociados
(Pontificia Universidad Católica del Perú, 2016-05-04)
Se presenta a la erosión de suelos como un problema latente alrededor del mundo, esta situación se agrava en los países en desarrollo por la falta de información actualizada, como es el caso del Perú. Por ello esta investigación tiene como objetivo...
Riesgo radiológico debido a la radiactividad natural y exhalación de radón de suelos y materiales de construcción peruanos
(Pontificia Universidad Católica del Perú, 2023-07-06)
La exposición al Radón es una preocupación importante debido a su papel en el aumento del riesgo de cáncer de pulmón. Para evaluar el riesgo de exposición, es necesario realizar mediciones de Radón en el aire interior de los hogares, y tener...
Radon exposure is a major concern due to its role in increasing the risk of lung cancer. To assess radiation exposure risks, measuring radon levels indoor air and characterizing the radiological hazard due to building materials is necessary. The radon exhalation rate in building materials was measured by closed-chamber accumulation over 24 h for dissociated or pulverized samples and 28 days for compacted materials. The Radon concentration in the chamber is measured regularly during this period and is used to calculate the Radon mass exhalation rate and Radon surface exhalation rate, respectively. In the case of soils, the radiological risk is associated with the geogenic potential of Radon. This parameter is obtained from the permeability and the concentration of Radon in the ground. The results of this study show that the radon exhalation rate in building materials and soils can vary significantly. In building materials, an average exhalation rate of 14.01 ± 1.04 mBq kg−1h −1 was found, with a range of [4.50 ± 0.42] to [22.34 ± 1.30] mBq kg−1 h −1 . In addition, a good correlation was found between the total Radium concentration in building materials and the Radon exhalation rate, with a correlation coefficient (R2 0.88). The radon exhalation rate in bricks is higher than in other samples. It can be because the area of raw material extraction for the elaboration of bricks is the closest to the uranium-producing possible regions. Gypsum samples did not show significant radon exhalation, which is consistent with the amount of radium in these samples. Finally, the results obtained for radiological indexes (Radium equivalent Raeq, Gamma index Iγ, and External hazard Hex) all types of samples are suitable for use as building materials because they present a low activity concentration....
Radon exposure is a major concern due to its role in increasing the risk of lung cancer. To assess radiation exposure risks, measuring radon levels indoor air and characterizing the radiological hazard due to building materials is necessary. The radon exhalation rate in building materials was measured by closed-chamber accumulation over 24 h for dissociated or pulverized samples and 28 days for compacted materials. The Radon concentration in the chamber is measured regularly during this period and is used to calculate the Radon mass exhalation rate and Radon surface exhalation rate, respectively. In the case of soils, the radiological risk is associated with the geogenic potential of Radon. This parameter is obtained from the permeability and the concentration of Radon in the ground. The results of this study show that the radon exhalation rate in building materials and soils can vary significantly. In building materials, an average exhalation rate of 14.01 ± 1.04 mBq kg−1h −1 was found, with a range of [4.50 ± 0.42] to [22.34 ± 1.30] mBq kg−1 h −1 . In addition, a good correlation was found between the total Radium concentration in building materials and the Radon exhalation rate, with a correlation coefficient (R2 0.88). The radon exhalation rate in bricks is higher than in other samples. It can be because the area of raw material extraction for the elaboration of bricks is the closest to the uranium-producing possible regions. Gypsum samples did not show significant radon exhalation, which is consistent with the amount of radium in these samples. Finally, the results obtained for radiological indexes (Radium equivalent Raeq, Gamma index Iγ, and External hazard Hex) all types of samples are suitable for use as building materials because they present a low activity concentration....
Evaluación de la fitorremediación con Sesuvium Portulacastrum para la extracción de metales pesados de un relave minero proveniente de una operación minera y de suelos y aguas contaminadas artificialmente con metales pesados
(Pontificia Universidad Católica del Perú, 2020-09-01)
sustancias en efluentes residuales. Por otro lado, si ya se ha dado una contaminación, se exige la remediación de los daños ocasionados al ecosistema. La presente tesis investiga al Sesuvium Portulacastrum, una planta que podría ser de utilidad en la...
La gestión territorial para la recuperación de ecosistemas fluviales: el caso de la Mancomunidad Municipal Cuenca Mantaro
(Pontificia Universidad Católica del Perú, 2021-10-14)
La degradación de los ecosistemas fluviales es una de las principales problemáticas
ambientales del Perú. En el caso del río Mantaro, uno de las principales causas del problema es
la contaminación de los ríos por parte de los efluentes y residuos...