Format

Send to

Choose Destination
Mar Pollut Bull. 2017 Jan 15;114(1):602-608. doi: 10.1016/j.marpolbul.2016.09.040. Epub 2016 Sep 21.

Natural radioactivity assessment of surface sediments in the Yangtze Estuary.

Author information

1
State Key Laboratory of Estuarine and Coastal Research, East China Normal University, Shanghai 200062, PR China.
2
State Key Laboratory of Estuarine and Coastal Research, East China Normal University, Shanghai 200062, PR China. Electronic address: jzdu@sklec.ecnu.edu.cn.

Abstract

The activities of the natural radionuclides (238U, 232Th, 226Ra and 40K) of the surface sediments in the Yangtze Estuary were determined and used to evaluate radiation hazards in the study area. The of activities of 238U, 232Th, 226Ra and 40K ranges from 14.1 to 62.3, 26.1 to 71.9, 13.7 to 52.3, and 392 to 898Bqkg-1, respectively, which were comparable to values of other regions in China. The activities of 232Th, 40K and 226Ra were clearly different from the global recommended values. The radium equivalent activity was less than the recommended limit of 370Bqkg-1; therefore, the sediment in this area can be safely used for reclamation. The external hazard index values were less than one. The average absorbed gamma dose rate and annual effective dose equivalent values were slightly greater than the world average value. 226Ra/238U and 232Th/238U ratios could potentially be applied for tracing sediment source.

KEYWORDS:

(226)Ra/(238)U; Natural radioactivity; Radiation hazard; Sediment; Yangtze Estuary

PMID:
27665323
DOI:
10.1016/j.marpolbul.2016.09.040
[Indexed for MEDLINE]

Supplemental Content

Full text links

Icon for Elsevier Science
Loading ...
Support Center