Journal of Chemistry / 2020 / Article / Tab 2

Research Article

Activity Concentrations of Sr-90 and Cs-137 in Seawater and Sediment in the Gulf of Tonkin, Vietnam

Table 2

Radioactivity concentrations of Sr-90 and Cs-137 in surface seawater and sediment in the Gulf of Tonkin.

Sampling locationSampling dateRadioactivity concentration
Surface seawater (Bq/m3)Sediment (Bq/kg, dry)
Cs-137Sr-90Cs-137/Sr-90Cs-137Sr-90Cs-137/Sr-90

Tra Co1 Dec. 20181.05 ± 0.161.08 ± 0.200.970.97 ± 0.170.44 ± 0.082.20
1 Feb. 20191.21 ± 0.210.80 ± 0.151.510.44 ± 0.080.54 ± 0.130.81
1 June 20191.33 ± 0.180.78 ± 0.161.710.51 ± 0.100.37 ± 0.091.38
1 Oct. 20191.27 ± 0.170.85 ± 0.141.491.05 ± 0.180.59 ± 0.141.78
Average ± SD1.22 ± 0.120.88 ± 0.141.42 ± 0.310.74 ± 0.310.49 ± 0.101.54 ± 0.59

Bach Long Vi1 Dec. 20181.27 ± 0.221.18 ± 0.241.081.17 ± 0.190.48 ± 0.082.44
1 Feb. 20191.62 ± 0.251.11 ± 0.201.461.08 ± 0.170.41 ± 0.072.63
1 June 20191.23 ± 0.131.24 ± 0.250.990.82 ± 0.130.54 ± 0.141.52
1 Oct. 20191.58 ± 0.231.14 ± 0.201.390.98 ± 0.140.52 ± 0.121.88
Average ± SD1.43 ± 0.201.17 ± 0.061.22 ± 0.231.01 ± 0.150.49 ± 0.062.12 ± 0.51

Ky Anh1 Dec. 20181.02 ± 0.110.81 ± 0.151.260.88 ± 0.150.56 ± 0.131.57
1 Feb. 20191.66 ± 0.251.19 ± 0.241.390.69 ± 0.120.34 ± 0.082.03
1 June 20191.29 ± 0.241.13 ± 0.211.151.00 ± 0.190.39 ± 0.082.56
1 Oct. 20191.33 ± 0.171.23 ± 0.251.090.67 ± 0.080.42 ± 0.091.60
Average ± SD1.33 ± 0.261.09 ± 0.191.22 ± 0.140.81 ± 0.160.43 ± 0.091.94 ± 0.47

Measurement uncertainty.

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