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Fractionation of environmental radioactivity in road dust from a megacity: external and internal health risks.
Khan, Rahat; Habib, Md Ahosan; Tamim, Umma; Kormoker, Tapos; Khan, Md Harunor Rashid; Rashid, Md Bazlar; Idris, Abubakr M; Aldawood, Saad; Hossain, Syed Mohammod; Islam, Md Saiful.
Afiliación
  • Khan R; Institute of Nuclear Science & Technology, Bangladesh Atomic Energy Commission, Savar, Dhaka, 1349, Bangladesh. rahatkhan.baec@gmail.com.
  • Habib MA; Geological Survey of Bangladesh, Segunbaghicha, Dhaka, 1000, Bangladesh.
  • Tamim U; Institute of Nuclear Science & Technology, Bangladesh Atomic Energy Commission, Savar, Dhaka, 1349, Bangladesh.
  • Kormoker T; Department of Emergency Management, Patuakhali Science and Technology University, Dumki, Patuakhali, 8602, Bangladesh.
  • Khan MHR; Department of Science and Environmental Studies, The Education University of Hong Kong, Tai Po, New Territories, Hong Kong.
  • Rashid MB; Physics Discipline, Khulna University, Khulna, 9208, Bangladesh.
  • Idris AM; Geological Survey of Bangladesh, Segunbaghicha, Dhaka, 1000, Bangladesh.
  • Aldawood S; Department of Chemistry, College of Science, King Khalid University, 62529, Abha, Saudi Arabia.
  • Hossain SM; Research Center for Advanced Materials Science (RCAMS), King Khalid University, Abha, Saudi Arabia.
  • Islam MS; Department of Physics and Astronomy, College of Science, King Saud University, P.O. BOX 2455, 11451, Riyadh, Saudi Arabia.
Environ Sci Pollut Res Int ; 31(5): 8254-8273, 2024 Jan.
Article en En | MEDLINE | ID: mdl-38175520
ABSTRACT
Naturally occurring radioactive materials (NORMs 232Th, 226Ra, 40K) can reach our respiratory system by breathing of road dust which can cause severe health risks. Targeting the pioneering consideration of health risks from the NORMs in road dust, this work reveals the radioactivity abundances of NORMs in road dust from a megacity (Dhaka) of a developing country (Bangladesh). Bulk chemical compositions of U, Th, and K obtained from neutron activation analysis were converted to the equivalent radioactivities. Radioactivity concentrations of 226Ra, 232Th, and 40K in road dust ranged from 60-106, 110-159, and 488-709 Bq kg-1 with an average of 84.4 ± 13.1, 126 ± 11, and 549 ± 48 Bq kg-1, respectively. Estimated 226Ra, 232Th, and 40K radioactivities were, respectively, 1.7-3.0-, 3.7-5.3-, and 1.2-1.8-folds greater than the affiliated world average values. Mechanistic pathway of NORMs' enrichment and fractionation relative to the major origin (pedosphere) were evaluated concerning the water logging, relative solubility-controlled leaching and translocation, climatic conditions, and aerodynamic fractionations (dry and wet atmospheric depositions). Computation of customary radiological risk indices invokes health risks. Noticing the ingress of NOMR-holding dust into the human respiratory system along with the associated ionizing radiations, the computed radiological indices represent only the least probable health hazards. Nevertheless, in real situations, α-particles from the radioactive decay products of 232Th and 238U can create acute radiation damages of respiratory system. Policymakers should emphasize on limiting the dust particle evolution, and public awareness is required to alleviate the health risks.
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Asunto principal: Radiactividad / Contaminantes Radiactivos del Suelo / Monitoreo de Radiación Tipo de estudio: Etiology_studies / Risk_factors_studies Límite: Humans País/Región como asunto: Asia Idioma: En Revista: Environ Sci Pollut Res Int Asunto de la revista: SAUDE AMBIENTAL / TOXICOLOGIA Año: 2024 Tipo del documento: Article País de afiliación: Bangladesh Pais de publicación: Alemania
Texto completo
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Asunto principal: Radiactividad / Contaminantes Radiactivos del Suelo / Monitoreo de Radiación Tipo de estudio: Etiology_studies / Risk_factors_studies Límite: Humans País/Región como asunto: Asia Idioma: En Revista: Environ Sci Pollut Res Int Asunto de la revista: SAUDE AMBIENTAL / TOXICOLOGIA Año: 2024 Tipo del documento: Article País de afiliación: Bangladesh Pais de publicación: Alemania