Osnovnye zakonomernosti raspredelenija, migracii i nakoplenija radionuklidov v donnyh otlozhenijah Baltijskogo morja [The basic patterns of the distribution, migration and accumulation of radionuclides in the bottom sediment of the Baltic Sea]

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, Key wor hydromica, pH . . » [6], . . , -, . » : 40K

r focuses on the natural (226Ra, n the sediments ution of 137Cs i grain-size fractio

The accumula the pH geochem f 232Th occurs d accumulation o

tained in hydro in a few samples

ые :

,

rds: radionu H barrier, sedi

« , . . . . -» х (226

e impact of cer 232Th, 40 ) a of the Baltic Se is determined by ons, while radio ation of 226Ra mical barrier at s mainly in clay of 40K is predom omica minerals s. : , , uclide distrib iment fraction , , . . .

6Ra, 232Th, 40

137Cs

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– .

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rtain factors on and anthropoge ea. The results o y the content of ocaesium is mai a by bottom se

t the water-seaf yey fractions of minantly determ s. Significant

ution pattern ns, grain-size c

. . . . . . : 0 ) . , . 23 . .

n the contempo nic ( 137Cs, 60 of the study sug f hydromica of s inly accumulated ediments is ma floor boundary. f the sediment. mined by the rati 60Co activity

, .

ns, Baltic S composition. , . . . . . .

(226Ra, 232

.

.

- ч щ х ( / )

х х

226

Ra 232Th 40K 137Cs 60Co

N

A σ A σ A σ A σ A σ

52 31 75 34 805 303 560 458 5 11 411

48 22 56 16 963 152 163 32 — — 29

47 19 52 11 837 143 63 39 3 2 49

25 8 32 6 615 108 14 8 — — 28

: 1.

. 60 ,

. 2. —

, σ — , N — .

137

Cs, 232Th

226

Ra c : —

— . Э

137

Cs « » ,

. Th Ra, ,

. 226Ra 232Th

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U(Ra) Th

[14; 15].

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R-. , ,

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(pH, Eh) , .

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— 137Cs, , Eh.

— 226Ra pH. 40 ,

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232

Th. Э

, ,

226_Ra

232_Th

40

137_Cs

pH

Eh

1.25-1.0

1.0-0.5 0.5-0.25 0.25-0.1

0.1-0.05

0.05-0.01 0.01-0.005 0,005-0,001

<0.001

-1,0 -0,8 -0,6 -0,4 -0,2 0,0 0,2 0,4 0,6 0,8 1,0 1,2

Фактор 1

-0,8 -0,6 -0,4 -0,2 0,0 0,2 0,4 0,6 0,8

Фактор

2

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Ph, Eh, ,

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[11],

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, 97,5%, . ё

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, 226Ra pH.

Э :

, (R=+0,36) pH

226_{Ra, . . .}

, , ,

, [7; 11].

, ,

, [12].

: pH

7,24—8,07 pH=7,4,

.

(pH =7,6—8,5) pH=8,0. ,

— ,

.

.

,

137

Cs ,

0,1—0,01 .

. [6; 11],

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. [3] ,

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110—130 [3], . . .

( . . 1),

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-» . 1986 . ,

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137_{Cs, ,}

27—32% ,

. 1992 .,

[1, . 16]. ,

,

. 137Cs

.

40_K 39_{K. [4; 13] ,}

(K1—1,5Al4[Si7—6,5Al1—1,5O20](OH)4⋅nH2O).

(0,005—0,001 ) (< 0,001 ) [3].

, ,

, 40 , , ,

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( . 2).

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(198—220 ),

[3].

226 Ra 232_Th

40 K 137_Cs

1.25-1.0 1.0-0.5

0.5-0.25 0.25-0.1

0.1-0.05

0.05-0.01

0.01-0.00 0005-000<0.001 Ph

Eh

-1,0 -0,8 -0,6 -0,4 -0,2 0,0 0,2 0,4 0,6 0,8 1,0

ктор 1

-1,0 -0,8 -0,6 -0,4 -0,2 0,0 0,2 0,4 0,6 0,8

ктор

2

. 2. ,

Ph, Eh, ,

Eh pH . .

-, .

, , — ,

.

137

Cs, 232Th

226Ra c

: — —

. Э

-, 137Cs — “ ”

.

137_Cs

, .

. 226Ra

— . 232Th

,

.

40_{K ,}

. 60Co

,

. , 60Co

С и и е ы

1. . ., . ., . . .

1992 . . ., 1993.

2. . ., .Ю., Ш . .

. , 1982.

3. / . . . . . . , 1976.

4. .

1:500 000 / - , - ; . . . .

., 1991.

5. . ., . .

// . 1978. . 238, №1. . 225—228.

6. . ., . . . ., 1975.

7. . . . , 1998.

8. . ., . ., . .

- // CCCP. 1997. . 355, №3. . 365—

368.

9. . ., . . 137Cs

// . 1988.

№5. . 540—554.

10. . ., . ., .

. , 1994.

11. . . . ., 1968.

12. . . . ., 1989.

13. . .

-: . … . .- . . ., 2002.

14. . ., . ., . .

// : .

. . ., 1987. . 47—55.

15. . . . ., 1974.

16. . ., . ., . . .

1988—1989 . ., 1994. 17. Ф . . . . 2. ., 1993.

О х

, - , ,

- .

E-mail: Andrey_Grigiryev@vsegei.ru

, - ,

, ,

.

E-mail: vladimirovs2001@mail.ru.

About authors

Dr. Andrey Grigoryev, Senior Research Fellow, All-Russian Geological Research Institute. E-mail: Andrey_Grigiryev@vsegei.ru

Dr. Maxim Vladimirov, deputy head of a department, Ministry of the Russian Federation for Civil Defence, Emergencies and Elimination of Consequences of Natural Disasters.