« Previous AbstractVolatile S-nitrosothiols and the typical smell of cancer    Next Abstract"Waterpipe smoke: source of toxic and carcinogenic VOCs, phenols and heavy metals?" »

Environ Sci Technol

Title:		Test system to establish mass balances for 14C-labeled substances in soil-plant-atmosphere systems under field conditions
Author(s):		Schroll R; Kuhn S;
Address:		"GSF-National Research Center for Environment and Health, Institute of Soil Ecology, Ingolstaedter Landstrasse 1, D-85764 Neuherberg, Germany. schroll@gsf.de"
Journal Title:		Environ Sci Technol
Year:		2004
Volume:		38
Issue:		5
Page Number:		1537 - 1544
DOI:		10.1021/es030088r
ISSN/ISBN:		0013-936X (Print) 0013-936X (Linking)
Abstract:		"A test system has been developed that allows the formation of mass balances for 14C-labeled organic compounds in soil-plant-atmosphere systems under field conditions. The main focus was the quantification of all different 14C-labeled gaseous losses from soil and plant surfaces after the application of 14C-labeled chemicals; therefore, a two-chamber system with specially designed trapping facilities was designed. Volatile 14C-labeled compounds and 14CO2 resulting from the total degradation of the applied 14C-labeled chemical could be trapped separately, and 14C gaseous losses from plant and soil surfaces could be determined separately as well. With this test system, it was feasible for the first time to distinguish between 14C volatile and 14CO2 losses from soil surfaces and from plant surfaces in soil monolith systems under real environmental conditions. The system itself was established on surfaces of soil monoliths (lysimeters) to study the above-mentioned processes along with the transport and leaching behavior of the chemicals in soil cores. With the new system, the behavior of organic chemicals was followed up for a whole vegetation period, and a mass balance for the applied chemical was established. Therefore, a better prediction of the long-term behavior of organic chemicals under real environmental climatic conditions was achieved. The first results for the fate of the model herbicide isoproturon in two different types of agricultural soils are presented and compared with results from an extensive laboratory study"
Keywords:		"*Atmosphere Carbon Radioisotopes/analysis Environmental Monitoring/*methods *Models, Theoretical Organic Chemicals/analysis *Plants *Soil Volatilization Water/chemistry;"
Notes:		"MedlineSchroll, Reiner Kuhn, Sabine eng 2004/03/30 Environ Sci Technol. 2004 Mar 1; 38(5):1537-44. doi: 10.1021/es030088r"