Presentations

Model assessment of heavy metal assimilation using the example of copper in the ecosystem of Lake Teletskoye

Tskhai A.A., Romanov M.A.

Institute of Water and Environmental Problems SB RAS, Russia, 656038, Barnaul, Molodezhnaya str., 1, Tel. +7(3852) 666-501. E-mail: tskhai@iwep.ru

Using the example of copper, a preliminary model assessment of the permissible load of heavy metals on the ecosystem of Lake Teletskoye (LT) was performed. The assumption is used that the volume of toxic substances assimilated in the ecosystem during the year is equal to the incoming mass flow into the water body over the same period [1]. This approach made it possible at one time to estimate the permissible load on Lake Onega, which is quite well studied compared to LT [2].

The performed preliminary calculations showed that the annual assimilation of dissolved forms of copper into the lake is 1.7 tons per year with a total intake of 27.4 tons per year. The assimilation potential of CB in relation to dissolved forms of copper is insignificant, almost an order of magnitude less than in Onega. This is due to the relatively small presence of the toxicant, which is about 4 times less than in Lake Onega. Colder water and a relatively poor composition of aquatic organisms slow down the processes of self-purification of the ecosystem throughout the year compared to Lake Onega.

The average annual concentration corresponding to the case of the permissible load for maintaining the stability of the ecosystem is Cu = 3.0 micrograms/l. This is lower than the maximum permissible concentration of 10 micrograms/l for dissolved forms of copper in the water of drinking and cultural water use facilities, but higher than the maximum permissible concentration of 1 microgram/l for fisheries reservoirs. The relatively high concentrations of dissolved forms of copper are determined by natural factors, primarily the presence of polymetal deposits in the Altai Mountains in the drainage basin.

Table. The period of water exchange, the retention capacity of lakes, the coefficients of the rate of transformation of substances and total assimilation

Lake no. τ,years Cu

R,b/r K,year-1 As,t/year

1 Onega [2] 15.6 0.05 0.04 11.7

2 Teletskoye 4.35 0.02 0.01 1.7

Literature

1. Tskhai A.A., Romanov M.A., Kupriyanov V.A. A model of the assimilation potential of a lake ecosystem on the example of biogenic pollutants // Computer research modeling. 2024. No. 6. pp. 1447-1465.

2. Lozovik P.A., Kulik N.V., Efremenko N.A. Lithophilic elements and heavy metals in Lake Onega: sources of supply, content and transformation // Tr. Kar. NC RAS. 2020. No. 4. pp. 62-74.Using the example of copper, a preliminary model assessment of the permissible load of heavy metals on the ecosystem of Lake Teletskoye (LT) was performed. The assumption is used that the volume of toxic substances assimilated in the ecosystem during the year is equal to the incoming mass flow into the water body over the same period [1]. This approach made it possible at one time to estimate the permissible load on Lake Onega, which is quite well studied compared to THAT [2].

The performed preliminary calculations showed that the annual assimilation of dissolved forms of copper into the lake is 1.7 tons per year with a total intake of 27.4 tons per year. The assimilation potential of CB in relation to dissolved forms of copper is insignificant, almost an order of magnitude less than in Onega. This is due to the relatively small presence of the toxicant, which is about 4 times less than in Lake Onega. Colder water and a relatively poor composition of aquatic organisms slow down the processes of self-purification of the ecosystem throughout the year compared to Lake Onega.

The average annual concentration corresponding to the case of the permissible load for maintaining the stability of the ecosystem is Cu = 3.0 micrograms/l. This is lower than the maximum permissible concentration of 10 micrograms/l for dissolved forms of copper in the water of drinking and cultural water use facilities, but higher than the maximum permissible concentration of 1 microgram/l for fisheries reservoirs. The relatively high concentrations of dissolved forms of copper are determined by natural factors, primarily the presence of polymetal deposits in the Altai Mountains in the drainage basin.

Table. The period of water exchange, the retention capacity of lakes, the coefficients of the rate of transformation of substances and total assimilation

Lake no. τ,years Cu

R,b/r K,year-1 As,t/year

1 Onega [2] 15.6 0.05 0.04 11.7

2 Teletskoye 4.35 0.02 0.01 1.7

Literature

1. Tskhai A.A., Romanov M.A., Kupriyanov V.A. A model of the assimilation potential of a lake ecosystem on the example of biogenic pollutants // Computer research modeling. 2024. No. 6. pp. 1447-1465.

2. Lozovik P.A., Kulik N.V., Efremenko N.A. Lithophilic elements and heavy metals in Lake Onega: sources of supply, content and transformation // Tr. Kar. NC RAS. 2020. No. 4. pp. 62-74.Using the example of copper, a preliminary model assessment of the permissible load of heavy metals on the ecosystem of Lake Teletskoye (LT) was performed. The assumption is used that the volume of toxic substances assimilated in the ecosystem during the year is equal to the incoming mass flow into the water body over the same period [1]. This approach made it possible at one time to estimate the permissible load on Lake Onega, which is quite well studied compared to THAT [2].

The performed preliminary calculations showed that the annual assimilation of dissolved forms of copper into the lake is 1.7 tons per year with a total intake of 27.4 tons per year. The assimilation potential of CB in relation to dissolved forms of copper is insignificant, almost an order of magnitude less than in Onega. This is due to the relatively small presence of the toxicant, which is about 4 times less than in Lake Onega. Colder water and a relatively poor composition of aquatic organisms slow down the processes of self-purification of the ecosystem throughout the year compared to Lake Onega.

The average annual concentration corresponding to the case of the permissible load for maintaining the stability of the ecosystem is Cu = 3.0 micrograms/l. This is lower than the maximum permissible concentration of 10 micrograms/l for dissolved forms of copper in the water of drinking and cultural water use facilities, but higher than the maximum permissible concentration of 1 microgram/l for fisheries reservoirs. The relatively high concentrations of dissolved forms of copper are determined by natural factors, primarily the presence of polymetal deposits in the Altai Mountains in the drainage basin.

Table. The period of water exchange, the retention capacity of lakes, the coefficients of the rate of transformation of substances and total assimilation

Lake no. τ,years Cu

R,b/r K,year-1 As,t/year

1 Onega [2] 15.6 0.05 0.04 11.7

2 Teletskoye 4.35 0.02 0.01 1.7

Literature

1. Tskhai A.A., Romanov M.A., Kupriyanov V.A. A model of the assimilation potential of a lake ecosystem on the example of biogenic pollutants // Computer research modeling. 2024. No. 6. pp. 1447-1465.

2. Lozovik P.A., Kulik N.V., Efremenko N.A. Lithophilic elements and heavy metals in Lake Onega: sources of supply, content and transformation // Tr. Kar. NC RAS. 2020. No. 4. pp. 62-74.

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