Journal of Radioanalytical and Nuclear Chemistry, 2021
The evaluation of indoor radon exposure in dwellings is done for the first time in Lubango. The c... more The evaluation of indoor radon exposure in dwellings is done for the first time in Lubango. The corresponding annual effective dose to which the population is exposed during the wintertime was calculated. A total of 59 single-family houses and 16 public buildings were selected. The results obtained show that in 100% of the houses, the radon concentrations are below 300 Bq m −3 . The values of the indoor annual effective dose vary from (2.0 ± 0.1) to (7.0 ± 0.2) mSv y −1 below the recommended maximum reference level of 10 mSv y −1 .
The aim of this study is to measure the radon mass exhalation rate from common granite building m... more The aim of this study is to measure the radon mass exhalation rate from common granite building materials used in the east and northeast part of Portugal. Twelve cubic shaped samples were measured. Nine of them without any coating and three coated with different materials (varnish, hydrorepellent and liquid silicone). The radon measurements were performed with two different techniques: one using passive detectors and other using an active detector. For the passive method, CR-39 solid-state nuclear track detectors were used. The active method used the RAD7 DURRIDGE detector. Radon mass exhalation rates obtained from both methods present relatively low values in the 11–45 mBq kg−1 h−1 range for the analysed samples. Concerning the coated samples, the measured values are on average four times lower than the ones without coating. Overall, the measured values for both methods present a good agreement.
In Angola, specifically in the province of Namibe, there are several hot springs that can be used... more In Angola, specifically in the province of Namibe, there are several hot springs that can be used for different purposes, but no preservation and improvement actions are undertaken for their exploitation; under these conditions, in the municipality of Bibala, there is a thermal spring called Montipa. The present work aims to evaluate the physical-chemical, microbiological and radiological quality of the thermal waters of Montipa, Bibala-Namibe municipality, socio environmental aspects of the area under investigation; For which, a nonexperimental analytical study was developed based on methods and techniques of physicochemical, microbiological and radiological analysis of water. It is concluded that in general, the Montipa hot springs have good physical chemical, microbiological and radiological characteristics according to international and national standards. It is possible to make better use of this resource for human and therapeutic consumption, livestock troughs, agricultural ir...
Journal of Radioanalytical and Nuclear Chemistry, 2021
The evaluation of indoor radon exposure in dwellings is done for the first time in Lubango. The c... more The evaluation of indoor radon exposure in dwellings is done for the first time in Lubango. The corresponding annual effective dose to which the population is exposed during the wintertime was calculated. A total of 59 single-family houses and 16 public buildings were selected. The results obtained show that in 100% of the houses, the radon concentrations are below 300 Bq m −3 . The values of the indoor annual effective dose vary from (2.0 ± 0.1) to (7.0 ± 0.2) mSv y −1 below the recommended maximum reference level of 10 mSv y −1 .
The aim of this study is to measure the radon mass exhalation rate from common granite building m... more The aim of this study is to measure the radon mass exhalation rate from common granite building materials used in the east and northeast part of Portugal. Twelve cubic shaped samples were measured. Nine of them without any coating and three coated with different materials (varnish, hydrorepellent and liquid silicone). The radon measurements were performed with two different techniques: one using passive detectors and other using an active detector. For the passive method, CR-39 solid-state nuclear track detectors were used. The active method used the RAD7 DURRIDGE detector. Radon mass exhalation rates obtained from both methods present relatively low values in the 11–45 mBq kg−1 h−1 range for the analysed samples. Concerning the coated samples, the measured values are on average four times lower than the ones without coating. Overall, the measured values for both methods present a good agreement.
In Angola, specifically in the province of Namibe, there are several hot springs that can be used... more In Angola, specifically in the province of Namibe, there are several hot springs that can be used for different purposes, but no preservation and improvement actions are undertaken for their exploitation; under these conditions, in the municipality of Bibala, there is a thermal spring called Montipa. The present work aims to evaluate the physical-chemical, microbiological and radiological quality of the thermal waters of Montipa, Bibala-Namibe municipality, socio environmental aspects of the area under investigation; For which, a nonexperimental analytical study was developed based on methods and techniques of physicochemical, microbiological and radiological analysis of water. It is concluded that in general, the Montipa hot springs have good physical chemical, microbiological and radiological characteristics according to international and national standards. It is possible to make better use of this resource for human and therapeutic consumption, livestock troughs, agricultural ir...
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