Dynamics of Organochlorine Contaminants in Surface Water and in Myriophyllum aquaticum Plants of the River Xanaes in Central Argentina During the Annual Dry Season

摘要: The dynamics of organochlorine pesticides (OCPs) and their major metabolites were studied in surface waters plants the River Xanaes (province Cordoba, Argentina) during annual dry season. results 5-month monitoring study (April to August 2010) showed similar low contamination levels nonagricultural mountain agricultural areas both water plants. concentrations compounds detected <4.5 ng L−1, whereas these substances Myriophyllum aquaticum <5 μg kg−1 (dry weight) with exception trans-permethrin (17.6 kg−1, weight). Because no notable differences level between samples from area observed, it was assumed that OCPs may not play an important role today’s pesticide use this area. Furthermore, concentration–time trends for submerged a generally elimination behaviour independent compound sampling site, thus indicating integral rather then substance-specific process, such as partitioning plant ambient water. As known, rooted macrophytes can take up contaminants by way roots, so sediments be principal source. To understand river more deeply, further research should include sediment.