![Accumulation and release of ^2^4^1Am by a macrophyte of the Yenisei River (Elodea canadensis) [An article from: Journal of Environmental Radioactivity]](https://www.ebooknetworking.net/books/noimage.jpg)
Accumulation and release of ^2^4^1Am by a macrophyte of the Yenisei River (Elodea canadensis) [An article from: Journal of Environmental Radioactivity]
Description
This digital document is a journal article from Journal of Environmental Radioactivity, published by Elsevier in 2005. The article is delivered in HTML format and is available in your Amazon.com Media Library immediately after purchase. You can view it with any web browser.
Description:
The source of radioactive contamination of the Yenisei River floodplain, including contamination with transuranic elements, is the Mining-and-Chemical Combine of the Russian Ministry of Atomic Energy, which has for many years been producing weapons-grade plutonium. Transuranic elements have been detected not only in the soil and sediment of the river but also in the biomass of aquatic plants. This work is an investigation of accumulation and release of ^2^4^1Am by a submerged macrophyte of the Yenisei River (Elodea canadensis) in laboratory experiments. In 2000-2003, laboratory experiments were carried out with biomass of E. canadensis Mich. and filtered river water. The samples were collected from the Yenisei River upstream of the discharge of the Combine's radioactive effluent. The experiments showed that ^2^4^1Am is accumulated by Elodea biomass: the activity concentration of ^2^4^1Am can reach 3280+/-240Bq/g, with the concentration factor for ^2^4^1Am 16@?600+/-2200l/kg. Results of chemical fractionation have proved that in the course of ^2^4^1Am accumulation by Elodea biomass, ^2^4^1Am tightly bound to biomass increases from 11% to 27% of the total ^2^4^1Am in the biomass. Release of ^2^4^1Am from the decaying Elodea biomass has been evaluated experimentally. By the end of the experiment (lasting up to 127 days), the Elodea plants had lost up to 65% of their initial ^2^4^1Am activity and the rate of ^2^4^1Am release into the water environment reached 23Bq/day.
Description:
The source of radioactive contamination of the Yenisei River floodplain, including contamination with transuranic elements, is the Mining-and-Chemical Combine of the Russian Ministry of Atomic Energy, which has for many years been producing weapons-grade plutonium. Transuranic elements have been detected not only in the soil and sediment of the river but also in the biomass of aquatic plants. This work is an investigation of accumulation and release of ^2^4^1Am by a submerged macrophyte of the Yenisei River (Elodea canadensis) in laboratory experiments. In 2000-2003, laboratory experiments were carried out with biomass of E. canadensis Mich. and filtered river water. The samples were collected from the Yenisei River upstream of the discharge of the Combine's radioactive effluent. The experiments showed that ^2^4^1Am is accumulated by Elodea biomass: the activity concentration of ^2^4^1Am can reach 3280+/-240Bq/g, with the concentration factor for ^2^4^1Am 16@?600+/-2200l/kg. Results of chemical fractionation have proved that in the course of ^2^4^1Am accumulation by Elodea biomass, ^2^4^1Am tightly bound to biomass increases from 11% to 27% of the total ^2^4^1Am in the biomass. Release of ^2^4^1Am from the decaying Elodea biomass has been evaluated experimentally. By the end of the experiment (lasting up to 127 days), the Elodea plants had lost up to 65% of their initial ^2^4^1Am activity and the rate of ^2^4^1Am release into the water environment reached 23Bq/day.
