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Issue 3, 2013
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Organochlorine pesticide (OCP) residues in mountain soils from Tajikistan

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The concentrations and spatial distribution of organochlorine pesticides (OCPs) in surface soils of different altitudes (570–4656 m) from Tajikistan were determined. OCPs were detected in all samples with concentrations in the range 52.83–247.98 ng g−1 dry weight (ng g−1 dw). Aldrins were the most predominant compounds followed by chlordanes, hexachlorocyclohexanes (HCHs) and endosulfans, while dichlorodiphenyltrichloroethanes (DDTs) and methoxychlor were detected at much lower concentrations. Composition analysis indicated that OCPs mainly came from the atmospheric transport of historically used pesticides. OCP residues in the west and northwest parts of Tajikistan were higher than the east and the southeast due to the proximity to the potential sources and anthropogenic activity intensities around. Additionally, correlation analysis between OCPs and altitudes indicated that the more volatile pollutants, such as HCH isomers, seemed to become enriched more easily in regions with higher altitudes relative to the less volatile ones, such as DDTs.

Graphical abstract: Organochlorine pesticide (OCP) residues in mountain soils from Tajikistan

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The article was received on 23 Oct 2012, accepted on 19 Dec 2012 and first published on 28 Jan 2013

Article type: Paper
DOI: 10.1039/C2EM30849E
Environ. Sci.: Processes Impacts, 2013,15, 608-616

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    Organochlorine pesticide (OCP) residues in mountain soils from Tajikistan

    Z. Zhao, H. Zeng, J. Wu and L. Zhang, Environ. Sci.: Processes Impacts, 2013, 15, 608
    DOI: 10.1039/C2EM30849E

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