Vol. 14, issue 06-07, article # 27

Khozhina E.I., Palesskii S.V., Saprykin A.I. Migration of heavy metals to the atmosphere in the process of transpiration. // Atmospheric and oceanic optics. 2001. V. 14. No. 06-07. P. 553-556.
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Abstract:

For the first time, heavy metals were found in condensates of the transpiration excretion of macrophytes growing in sludge ponds of mining industry. Chemical analyses were made by AAS and ICP-MS methods. Lead and manganese were found in condensates of transpiration excretion of fluvial horsetail (Equisetum fluviatile L.) - 0.039 and 150 mg/(l•day) and common reed (Phragmites australis L.) - 0.14 and 48 mg/(l•day), respectively. The fact of the presence of heavy metals in transpiration was confirmed in laboratory for 7-day germs of spring wheat "Novosibirskaya-67" (Triticum aestivum L.) that were grown in sediment and water of tailings storage ponds. The following toxic elements and metals were found in wheat condensates: Cd (on average 0.087mg/(l•day)), Pb (2.7), Hg (0.056), Sn (0.36), Cu (3.9), Zn (14), Fe (120), Mn (1.3). These elements penetrate into the atmosphere as a result of physiological processes in plants, rather than due to mechanical transport.

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