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Organochlorine pesticides residue in lakes of Khorezm, Uzbekistan

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Abstract

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.

Additional Publication Details

Publication type:
Book
Publication Subtype:
Conference publication
Title:
Organochlorine pesticides residue in lakes of Khorezm, Uzbekistan
Year Published:
2009
Language:
English
Publisher:
International HCH and Pesticides Association
Publisher location:
Netherlands
Contributing office(s):
Nevada Water Science Center
Larger Work Title:
10th International HCH and pesticide forum book of papers: how many obsolete pesticides have been disposed of 8 years after signature of Stockholm Convention
First page:
157
Last page:
161
Conference Title:
10th International HCH and Pesticide Forum, 6-10 September, 2009
Conference Location:
Brno, Czech Republic
Conference Date:
2009-09-10T00:00:00
Country:
United States