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Organochlorine pesticides residue in lakes of Khorezm, Uzbekistan

January 1, 2009

The Khorezm province in northwest Uzbekistan is a productive agricultural area within the Aral Sea Basin that produces cotton, rice and wheat. Various organochlorine pesticides were widely used for cotton production before Uzbekistan's independence in 1991. In Khorezm, small lakes have formed in natural depressions that receive inputs mostly from agricultural runoff. Samples from lake waters and sediments, as well as water from the Amu Darya River (which is the source of most of the lake water) have been analyzed to study variations in the concentrations of organochlorine pesticides residues during the year. Low concentrations of DDT, DDD, DDE, a-HCH and y-HCH compounds were found in water and sediment samples. The concentration of persistent organochlorine pesticides (DDT and HCH) in water and sediment is much lower than the maximum permissible concentrations that exist for water and soil. According to these preliminary results, the investigated lakes in Khorezm appear to be suitable for recreation or for aquaculture.

Publication Year 2009
Title Organochlorine pesticides residue in lakes of Khorezm, Uzbekistan
Authors Michael R. Rosen, Bakhriddin Nishonov, Dilorom Fayzieva, L. Saito, J. Lamers
Publication Type Book
Publication Subtype Conference publication
Index ID 70042799
Record Source USGS Publications Warehouse
USGS Organization Nevada Water Science Center