Table 3.
Levels in the sea of naturally occurring nuclides of elements also present as
radioisotopes in fallout.
Also shown are the physical forms of the naturally
occurring elements in sea water, per cent solution of fallout radioisotopes in
sea water, and percentages of radioisotopes observed in plankton.
Gram/ton of
Form of
in sea water
element in
stable element
(ppm)
y
Fallout in sea water
stable
Per cent in solution
sea water
evidence
Indirect
(8)
Direct
evidence
_
percentage
fallout
element
sea water
plankton
samples
form of
(9)
elements in
particulate
Isotope
Average
Principal
of radio-
in five
zn©5
O14
mostly
02
--
C0271 58,60
0001
solution**
.0007
--
"
24.2
Fe>?
.02
particulate**
.00007
--
"
23.5
Zr95-NpI5
Cel44_ppl44
?
. 0004
Mn54
solution***
?
?
-.001
1.0
0
.O1
mostly
.002
--
C837
.002
mostly
--*
sr89_90
.13
mostly
Rut6_Rp106
2
Stable calcium
" potassium
2
solution**
solution
solution
400.
solution
380.
solution
--
7.2
o
‘
25.1
"
"
20.2
8.6
"
0.2
"
1.4
70
solution
0.1
87
solution
0
* A value of .05 per cent is given for cesium. The apparent insolubility is caused by
a strong adsorption of the cesium ion to colloidal particles of hydrolysate sediments
and not to its insolubility in sea water.
#* Goldberg 1954 (7).
*## Kawabata, personal communication.
a4
Dor.
Cur,
&s