title: Spatial distribution and risk assessment of radionuclides in soils around a coal-fired power plant: a case study from the city of Baoji, China.
abstract: Coal burning may enhance human exposure to the natural radionuclides that occur around coal-fired power plants (CFPP). In this study, the spatial distribution and hazard assessment of radionuclides found in soils around a CFPP were investigated using statistics, geostatistics, and geographic information system (GIS) techniques. The concentrations of (226)Ra, (232)Th, and (40)K in soils range from 12.54 to 40.18, 38.02 to 72.55, and 498.02 to 1126.98 Bq kg(-1), respectively. Ordinary kriging was carried out to map the spatial patterns of radionuclides, and disjunctive kriging was used to quantify the probability of radium equivalent activity (Ra(eq)) higher than the threshold. The maps show that the spatial variability of the natural radionuclide concentrations in soils was apparent. The results of this study could provide valuable information for risk assessment of environmental pollution and decision support.
authors.affiliation: College of Tourism and Environment, Shaanxi Normal University, 199 South Chang'an Road, Xi'an 710062, China.
authors.forename: Lijun
authors.initials: L
authors.lastname: Dai
authors.forename: Haiyan
authors.initials: H
authors.lastname: Wei
authors.forename: Lingqing
authors.initials: L
authors.lastname: Wang
mesh_terms: D002681:China; D002947:Cities; D003031:Coal; D003710:Demography; D011210:Power Plants / Q000592:standards; D011834:Radiation Monitoring; D011868:Radioisotopes / Q000032:analysis*; D018570:Risk Assessment; D012990:Soil Pollutants, Radioactive / Q000032:analysis*
chemical_list: D003031:Coal; D011868:Radioisotopes; D012990:Soil Pollutants, Radioactive