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Articolul urmator |
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574.4:547:581.1 (1) |
Ecologie generală şi biodiversitate (764) |
Chimie organică (475) |
Fiziologia plantelor (522) |
SM ISO690:2012 ROMANOVA, Mary, SHIMOVA, Julia. Paulownia for bioremediation of urbanized soils. In: Ecological and environmental chemistry : - 2022, Ed. 7, 3-4 martie 2022, Chișinău. Chisinau: Centrul Editorial-Poligrafic al USM, 2022, Ediția 7, Vol.1, p. 187. ISBN 978-9975-159-07-4.. 10.19261/eec.2022.v1 |
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Ecological and environmental chemistry Ediția 7, Vol.1, 2022 |
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Conferința "Ecological and environmental chemistry 2022" 7, Chișinău, Moldova, 3-4 martie 2022 | |||||
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CZU: 574.4:547:581.1 | |||||
Pag. 187-187 | |||||
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At the moment the problems of environmental protection are especially relevant for Russia. Intensive development, industrial activity and high traffic density on the roads contribute to the accumulation of various pollutants in the biosphere. Soil is the most important component of the ecosystem, which accumulates chemical pollutants. Among the numerous pollutants, heavy metals occupy a special place; they bind with mineral and organic compounds, which increases the overall level of soil toxicity. Paulownia is a fast-growing tree native to China, which grows up to 30 meters in height during a 5-7 year period and a trunk diameter of up to one meter. A distinctive feature of the tree is a rapidly developing root system, which makes the plant suitable for afforestation of areas that are under the threat of erosion. According to numerous foreign studies, Paulownia accumulates nitrates, heavy metals and other elements from the shallow and deep layers of the earth. In Russia now there are no widely known works on the study of Paulownia. The analysis of soil contamination with heavy metals in the city of Krasnoyarsk was carried out. It was revealed that the main pollutants are manganese, copper, cobalt, zinc, mercury, cadmium. Model soil solutions were prepared, in which Paulownia samples were planted. For three months, Paulownia grew up in a closed system. The soil contained metals with an excess of the permissible concentration by 10 times. After the experiment, a spectrophotographic analysis of Paulownia samples (leaves and stems) was carried out. The results obtained indicate that, along with the resistance of Paulownia to the high content of heavy metals in the soil, it is necessary to further study the influence of other anthropogenic impurities on the nature of adaptation and plant growth. The results obtained showed that Paulownia actually accumulates heavy metals from the soil into its living tissues. |
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