1. Selenga river delta soils

2. Heavy metals in Selenga river delta soils, mg/kg
Location
Soil type, cross-section number Сu Pb Zn Со Cr Ni
Perephelial part of delta
N-E part
Gleyi-Histic Fluvisols 7К
31,3
17,6
95,67
14,9 69
44,3
Ад сл.
6К,8К
18,3
10,1
35,5
8,1 60
10,3 W
11,12,13К
35,1
9,8
78,6
13,8 77
8,9 N
4-04 23
14,8
74,5
11,6 55 33
Selenga bed-river
Gleyic Fluvisols
4-05 38
109 16 72 50
Pre-bench delta part
Eutric Fluvisols 1К
7,9
9,4
30,8
6,6
90,4
5,8
Calcaric Humi-Gleyic Fluvisols
2К,3К
13,5
11,3
45,5
11,8
56,9
13,9
Paddle-shaped part of delta
14К
21,4
83,8
22,2
73,9
10,81
Central flood-plain
Calcaric Gleyic Fluvisols
4К,5К
20,1
22,4
35,9
10,7
63,7
28,4
Soltic Gleyic Fluvisols
15К
32,4
23,5
195,5 35
78,5
29,5
Flood-plain of Shumiha river
6-04
8,4 18
33,3
5,6
35,3
17,5
Flood-plain of Selenga river (near by Kabansk village) 5
29,3
4,7
11,9
High flood-plain
Steppe Eutric Fluvisols 9К
28,7
65,2
10,2
37,5
22,6
Average in soils
23,3
33,9
75,6
54,3
26,8
Clark concentrations 47 83 58
In Transbaikalin rocks
21,1
33,7
71,2
5,5
50,2
25,7
(Ubugunov, Kashin, 2004)
EOL (soils) (Protasov, 1995) 30
100 85

3. Conclusion
In floodplain-delta part of researched area the accumulation of heavy metalls on united mechanical and sorption barrier and on evaporating and sorption barrier can be found.
In the soils of this districts the concentration of Zn is higher than OEL.
Basic and alkalescent medium stimulated the accumulation of heavy metalls, especially in solted soils.
As to the Pb, it’s concentration is lower than in soils and rocks of South Transbaikalia and lower than OEL, that means that we can state the fact of its reducing, not the accumulation.

4. Thank you for the attention!