کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
4431538 1619864 2010 9 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Analysis of composition, distribution and origin of hexachlorocyclohexane residues in agricultural soils from NW Spain
موضوعات مرتبط
علوم زیستی و بیوفناوری علوم محیط زیست شیمی زیست محیطی
پیش نمایش صفحه اول مقاله
Analysis of composition, distribution and origin of hexachlorocyclohexane residues in agricultural soils from NW Spain
چکیده انگلیسی
Concentrations of the isomers of the organochlorine pesticide hexachlorocyclohexane (HCH) were determined in 252 surface soil samples collected within a sampling network covering agricultural areas in Galicia (NW Spain). The concentration of total HCH (sum of α + β + γ + δ) ranged between 4 and 2305 ng g−¹ (dry weight), with the α-HCH and γ-HCH isomers predominating (< 1-1404 ng g−¹ and < 1-569 ng g−¹, respectively). The distribution of the pesticide residues was very heterogeneous, with the largest concentrations present in one of the studied areas (the province of A Coruña). The distribution of HCH was not found to be related to any soil property (organic matter, pH, clays, and metals). Multivariate statistical analysis of the data revealed that three populations of samples with a defined composition of HCH, can be related to the source of HCH: technical HCH (α/γ > 3), lindane (99% γ-HCH), or both. The existence of a third population consisting almost exclusively of α-HCH suggests that background contamination of anthropogenic origin dates from several decades ago. The detailed analysis of these populations enabled the possible temporal scale of the application of these pesticides to be deduced.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Science of The Total Environment - Volume 408, Issue 22, 15 October 2010, Pages 5583-5591
نویسندگان
, , , ,