Initialising ...
Initialising ...
Initialising ...
Initialising ...
Initialising ...
Initialising ...
Initialising ...
Hasan, Md. M.*; Janik, M.*; Sakoda, Akihiro; Iimoto, Takeshi*
Environmental Monitoring and Assessment, 193(12), p.770_1 - 770_10, 2021/12
Times Cited Count：2 Percentile：13.39(Environmental Sciences)Potentially higher cancer risk due to exposure from natural background radiation was indicated for Bangladeshi population by estimations based on the countrywide study. Several regions with elevated natural background exhibited higher soil radium and thorium contents than the world average. Being the decay products of these radioactive elements, natural radon isotopes could constitute environmental risk factors for internal radiation exposure to the lungs of people living in these areas. Although lung cancer is one of most prevalent types of cancer in Bangladesh, its status and features are still unclear. To clarify the present status of one of the potential risk factors for lung cancer in the country, this review intends to ascertain the countrywide radon exposure, and its pathways by types of local dwelling and by regions; which would provide an indication of the internal exposures in areas of elevated natural background radiation and radionuclides of soil as well as an understanding of the preliminary contribution of environmental radon on the country's lung cancer prevalence. In this review, countrywide air radon exposures for Bangladeshi dwellings and workplaces are organized from peer-reviewed published papers. Radon has been identified as one of influential sources of radiation dose in Bangladesh with its higher radon exhalation and emanation rate from soil. A novel nationwide depiction of the overall indoor and soil radon levels for Bangladesh has been made through radiation maps. This would be helpful for designing future systematic radon/radiological surveys and research on the country's lung cancer prevalence.
Awual, M. R.; Hasan, M. M.*; Shahat, A.*; Naushad, M.*; Shiwaku, Hideaki; Yaita, Tsuyoshi
Chemical Engineering Journal, 265, p.210 - 218, 2015/04
Times Cited Count：259 Percentile：99.36(Engineering, Environmental)Awual, M. R.; Hasan, M. M.*; Naushad, M.*; Shiwaku, Hideaki; Yaita, Tsuyoshi
Sensors and Actuators B; Chemical, 209, p.790 - 797, 2015/03
Times Cited Count：157 Percentile：99.25(Chemistry, Analytical)Awual, M. R.; Hasan, M. M.*; Khaleque, M. A.*
Sensors and Actuators B; Chemical, 209, p.194 - 202, 2015/03
Times Cited Count：218 Percentile：99.69(Chemistry, Analytical)Awual, M. R.; Hasan, M. M.*; Znad, H.*
Chemical Engineering Journal, 259, p.611 - 619, 2015/01
Times Cited Count：258 Percentile：99.34(Engineering, Environmental)Awual, M. R.; Hasan, M. M.*
Journal of Industrial and Engineering Chemistry, 21, p.507 - 515, 2015/01
Times Cited Count：201 Percentile：98.85(Chemistry, Multidisciplinary)Awual, M. R.; Hasan, M. M.*
Sensors and Actuators B; Chemical, 206, p.692 - 700, 2015/01
Times Cited Count：222 Percentile：99.69(Chemistry, Analytical)Awual, M. R.; Hasan, M. M.*; Shahat, A.*
Sensors and Actuators B; Chemical, 203, p.854 - 863, 2014/11
Times Cited Count：175 Percentile：99.18(Chemistry, Analytical)Awual, M. R.; Hasan, M. M.*; Ihara, Toshihiro*; Yaita, Tsuyoshi
Microporous and Mesoporous Materials, 197, p.331 - 338, 2014/10
Times Cited Count：182 Percentile：99.23(Chemistry, Applied)Awual, M. R.; Hasan, M. M.*
Sensors and Actuators B; Chemical, 202, p.395 - 403, 2014/10
Times Cited Count：177 Percentile：99.24(Chemistry, Analytical)Awual, M. R.; Hasan, M. M.*
Microporous and Mesoporous Materials, 196, p.261 - 269, 2014/09
Times Cited Count：223 Percentile：99.58(Chemistry, Applied)Sakoda, Akihiro; Hasan, Md. M.*; Kanzaki, Norie; Iimoto, Takeshi*
no journal, ,
Radon is a naturally occurring radioactive gas that can cause lung cancer. Many nationwide and regional surveys, including Japan, on radon concentration in the indoor air of dwellings were implemented in the past couple of decades and compiled by international reports; the annual radon concentration in each nation or region was determined by long-term integrating measurement for dose assessment of the public. On the other hand, efforts of continuous time-resolved monitoring of radon, in addition to relevant environmental factors, have also been made for research purposes to elucidate physical mechanisms of spatial and time variations and elevation of indoor radon concentration as well as to investigate the possibility of predicting annual averages from short- or mid-term measurements. The aims of the present work are to update findings from such measurements and explore what should be future work.
Sakoda, Akihiro; Hasan, Md. M.*; Iimoto, Takeshi*
no journal, ,
no abstracts in English
Sakoda, Akihiro; Ishimori, Yuu; Hasan, Md. M.*; Jin, Q.*; Kanzaki, Norie; Iimoto, Takeshi*
no journal, ,
Building materials such as brick and concrete are known to be one of indoor radon (Rn-222) and thoron (Rn-220) sources. Most radon and thoron exhalation studies have been based on laboratory tests using pieces and blocks of such materials. To elucidate how laboratory findings can be used in a real-world environment, we conducted intensive in-situ radon and thoron exhalation tests on interior walls, with different structure types of an apartment (i.e., solid wall and cavity wall) for over a year. This study provides an insight into parameterizing a radon source input in modeling the spatial and temporal dynamics of indoor radon and thoron air concentrations.
