title: Environmental radionuclides in a coastal wetland of the Southern Laizhou Bay, China.
abstract: The radioactivity concentration of (238)U, (232)Th, (226)Ra, (40)K, and (137)Cs in soil samples collected in a coastal wetland of the Southern Laizhou Bay, China were measured. Mean activity concentrations were 54.4±11.7, 57.9±9.7, 28.6±4.3, 542±21, and 10.2±2.9Bqkg(-1) dry weight for (238)U, (232)Th, (226)Ra, (40)K and (137)Cs, respectively. Statistical analyses suggested significant correlations between clay content and (40)K as well as (137)Cs. The radium equivalent activity, the absorbed dose rate in the air at 1m above the ground surface, and the external hazard index were calculated. The result showed that the radioactivity level in the wetland was in normal range. But sites along the river tended to have higher radiological hazard indexes. The vertical distributions of radionuclides in profiles illustrated some phenomena, such as vertical transport of (238)U, disequilibrium between (238)U and (226)Ra, and change in material sources.
authors.affiliation: Key Laboratory of Marine Ecology and Environmental Sciences, Institute of Oceanology (IO), Chinese Academy of Sciences (CAS), Qingdao 266071, PR China; Graduate University of Chinese Academy of Sciences, Beijing 100049, PR China.
authors.forename: Qidong
authors.initials: Q
authors.lastname: Wang
authors.affiliation: Key Laboratory of Marine Ecology and Environmental Sciences, Institute of Oceanology (IO), Chinese Academy of Sciences (CAS), Qingdao 266071, PR China. Electronic address: jmsong@qdio.ac.cn.
authors.forename: Jinming
authors.initials: J
authors.lastname: Song
authors.affiliation: Key Laboratory of Marine Ecology and Environmental Sciences, Institute of Oceanology (IO), Chinese Academy of Sciences (CAS), Qingdao 266071, PR China.
authors.forename: Xuegang
authors.initials: X
authors.lastname: Li
authors.affiliation: Key Laboratory of Marine Ecology and Environmental Sciences, Institute of Oceanology (IO), Chinese Academy of Sciences (CAS), Qingdao 266071, PR China.
authors.forename: Huamao
authors.initials: H
authors.lastname: Yuan
authors.affiliation: Key Laboratory of Marine Ecology and Environmental Sciences, Institute of Oceanology (IO), Chinese Academy of Sciences (CAS), Qingdao 266071, PR China.
authors.forename: Ning
authors.initials: N
authors.lastname: Li
authors.affiliation: Key Laboratory of Marine Ecology and Environmental Sciences, Institute of Oceanology (IO), Chinese Academy of Sciences (CAS), Qingdao 266071, PR China; Graduate University of Chinese Academy of Sciences, Beijing 100049, PR China.
authors.forename: Lei
authors.initials: L
authors.lastname: Cao
mesh_terms: D061006:Bays; D002588:Cesium Radioisotopes / Q000032:analysis; D002681:China; D011197:Potassium Radioisotopes / Q000032:analysis; D011834:Radiation Monitoring / Q000379:methods*; D011868:Radioisotopes / Q000032:analysis*; D011883:Radium / Q000032:analysis; D045483:Rivers; D012990:Soil Pollutants, Radioactive / Q000032:analysis*; D013910:Thorium / Q000032:analysis; D014501:Uranium / Q000032:analysis; D053833:Wetlands
chemical_list: D002588:Cesium Radioisotopes; D011197:Potassium Radioisotopes; D011868:Radioisotopes; D012990:Soil Pollutants, Radioactive; D014501:Uranium; D013910:Thorium; D011883:Radium
keywords: Activity concentration; Coastal wetland; Radiological hazard; Radionuclides; Soil; Vertical distribution