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Интеллектуальная Система Тематического Исследования НАукометрических данных |
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Ecological and Geochemical Assessment of Woody Vegetation in Tungsten-Molybdenum Mining Area (Buryat Republic, Russia)тезисы доклада
- Авторы: Kasimov N.S., Kosheleva N.E., Timofeev I.V.
- Сборник: Internaional Conference on Agricultural and Biological Sciences. Abstract Proceedings
- Тезисы
- Год издания: 2016
- Место издания: Шанхай, Китай
- Первая страница: 66
- Последняя страница: 67
- Аннотация: The purpose of this work is to assess the TE composition of assimilating (needles, leaves) and perennial (bark) organs of Siberian larch Lárix sibírica and white birch Bétula platyphýlla in the impact area of Dzhida Tungsten and Molybdenum Mining Company (DTMMC) in Zakamensk (Transbaikal region, Russia) which is more than 60 years wins non-ferrous metals. Biogeochemical studies performed in 2013 showed that the needles and bark of Lárix sibírica and the leaves and bark of Bétula platyphýlla in the impact zone of the DTMMC are characterized by the increased concentrations of TEs, except for Mn. The total coefficient of the biogeochemical transformation Zv in the city averaged 95 and 46 for the assimilating organs of larch and birch respectively and 30 and 25 for their perennial organs. This was caused by the increased uptake of W, Mo, V, Pb, Bi, Cd, and Co in the city in comparison with the undisturbed environment (local background). The correlation between element concentrations in soils and plants is highest for the elements of the strong and moderate biological capture, including cationic Cu, Zn, Sr, Cd, and Ba and anions of the ore W, Mo and associated Bi elements. The most intensive TE accumulation was found in the larch needles due to the wax layer which firmly fixes the dust enriched with TEs. Within the city, two stable biogeochemical anomalies were found in the center and north of the city. In the first one Zv values reach 205-320 in the larch needles, and 71-100 in the birch leaves. Tailings, TPP and "Foundry" factory are the sources of TEs. The second anomaly with Zv values up to 260 for larch needles and 72 for birch leaves is confined to the residential area, where TEs are deposited from the atmosphere and enter with lateral flow from adjacent tailings.
- Добавил в систему: Кошелева Наталья Евгеньевна