Annexe A : Données relatives à l’échantillonnage et l’analyse
Tableau 9: Caractérisation des sédiments et des activités spécifiques des radionucléides d’intérêt dans la carotte sédimentaire de la baie d’Alger.
Prof.
(cm)
Taux
d’hum.
(%)
M.O.
(%)
Δm
210 Pb
226 Ra
137 Cs
228 Ra
212 Pb
40 K
(g·cm
-2 )
--------0-1
45.4
15.0
0.576
133
± 9
20.2
± 1.1
3.8
± 0.4
26
± 10
36.4 ± 1.1
479 ± 15
1-2
47.4
7.5
0.701
136
± 6
19.3
± 0.9
3.5
± 0.3
25
± 4
26.0 ± 0.8
441 ± 27
2-3
45.9
7.2
0.628
149
± 7
20.2
± 1.0
3.4
± 0.3
27
± 7
28.0 ± 0.9
481 ± 30
3-4
47.2
0.817
127
± 7
19.9
± 0.9
3.3
± 0.3
26
± 6
27.8 ± 0.8
461 ± 29
4-5
44.1
7.5
0.714
136
± 6
18.8
± 0.9
3.5
± 0.2
26
± 4
27.8 ± 0.8
447 ± 28
5-6
45.1
7.2
0.906
131
± 5
18.1
± 0.8
3.8
± 0.2
26
± 4
26.7 ± 0.7
466 ± 30
6-7
42.8
7.5
0.644
122
± 5
17.5
± 0.9
4.0
± 0.3
26
± 4
26.7 ± 0.8
462 ± 28
7-8
41.6
7.1
0.747
116
± 5
18.9
± 0.9
3.8
± 0.2
27
± 5
26.7 ± 0.8
466 ± 29
8-9
41.8
7.1
1.076
110
± 5
18.4
± 0.9
3.8
± 0.2
24
± 4
25.7 ± 0.8
462 ± 30
9-10
41.3
4.7
0.923
89
± 4
19.7
± 0.9
4.0
± 0.3
29
± 8
26.0 ± 0.7
474 ± 30
10-12 40.6
6.2
1.806
80
± 8
18.7
± 2.1
4.6
± 0.4
30
± 6
26.8 ± 2.0
471 ± 35
12-14 40.2
-
1.941
70
± 8
19.8
± 2.6
4.7
± 0.5
30
± 10
26.8 ± 2.4
490 ± 38
14-16 39.1
-
1.614
69
± 6
20.1
± 1.8
5.4
± 0.4
31
± 5
28.8 ± 1.7
500 ± 36
16-18 39.0
-
1.895
60
± 7
21.1
± 2.7
5.1
± 0.5
32
± 6
27.6 ± 2.3
504 ± 38
18-20 39.7
-
1.753
56
± 6
20.3
± 2.2
5.4
± 0.5
31
± 10
30.9 ± 2.2
468 ± 35
20-22 41.5
-
1.842
51
± 6
20.0
± 2.4
4.9
± 0.4
32
± 6
27.1 ± 2.2
480 ± 36
22-24 41.5
-
1.959
39
± 5
18.8
± 2.5
4.3
± 0.4
28
± 5
18.3 ± 1.7
430 ± 33
Tableau 9: Caractérisation des sédiments et des activités spécifiques des radionucléides d’intérêt dans la carotte sédimentaire de la baie d’Alger.
Prof.
(cm)
Taux
d’hum.
(%)
M.O.
(%)
Δm
210 Pb
226 Ra
137 Cs
228 Ra
212 Pb
40 K
(g·cm
-2 )
--------0-1
45.4
15.0
0.576
133
± 9
20.2
± 1.1
3.8
± 0.4
26
± 10
36.4 ± 1.1
479 ± 15
1-2
47.4
7.5
0.701
136
± 6
19.3
± 0.9
3.5
± 0.3
25
± 4
26.0 ± 0.8
441 ± 27
2-3
45.9
7.2
0.628
149
± 7
20.2
± 1.0
3.4
± 0.3
27
± 7
28.0 ± 0.9
481 ± 30
3-4
47.2
0.817
127
± 7
19.9
± 0.9
3.3
± 0.3
26
± 6
27.8 ± 0.8
461 ± 29
4-5
44.1
7.5
0.714
136
± 6
18.8
± 0.9
3.5
± 0.2
26
± 4
27.8 ± 0.8
447 ± 28
5-6
45.1
7.2
0.906
131
± 5
18.1
± 0.8
3.8
± 0.2
26
± 4
26.7 ± 0.7
466 ± 30
6-7
42.8
7.5
0.644
122
± 5
17.5
± 0.9
4.0
± 0.3
26
± 4
26.7 ± 0.8
462 ± 28
7-8
41.6
7.1
0.747
116
± 5
18.9
± 0.9
3.8
± 0.2
27
± 5
26.7 ± 0.8
466 ± 29
8-9
41.8
7.1
1.076
110
± 5
18.4
± 0.9
3.8
± 0.2
24
± 4
25.7 ± 0.8
462 ± 30
9-10
41.3
4.7
0.923
89
± 4
19.7
± 0.9
4.0
± 0.3
29
± 8
26.0 ± 0.7
474 ± 30
10-12 40.6
6.2
1.806
80
± 8
18.7
± 2.1
4.6
± 0.4
30
± 6
26.8 ± 2.0
471 ± 35
12-14 40.2
-
1.941
70
± 8
19.8
± 2.6
4.7
± 0.5
30
± 10
26.8 ± 2.4
490 ± 38
14-16 39.1
-
1.614
69
± 6
20.1
± 1.8
5.4
± 0.4
31
± 5
28.8 ± 1.7
500 ± 36
16-18 39.0
-
1.895
60
± 7
21.1
± 2.7
5.1
± 0.5
32
± 6
27.6 ± 2.3
504 ± 38
18-20 39.7
-
1.753
56
± 6
20.3
± 2.2
5.4
± 0.5
31
± 10
30.9 ± 2.2
468 ± 35
20-22 41.5
-
1.842
51
± 6
20.0
± 2.4
4.9
± 0.4
32
± 6
27.1 ± 2.2
480 ± 36
22-24 41.5
-
1.959
39
± 5
18.8
± 2.5
4.3
± 0.4
28
± 5
18.3 ± 1.7
430 ± 33
