State Key Laboratory of Lake Science and Environment Research, Nanjing Institute of Geography and Limnology, Chinese Academy of Sciences, Nanjing 210008, China.
Environ Sci Process Impacts. 2013 Mar;15(3):608-16. doi: 10.1039/c2em30849e.
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.
本研究测定了塔吉克斯坦不同海拔（570-4656 米）表层土壤中有机氯农药（OCPs）的浓度和空间分布。所有样本中均检测到 OCPs，浓度范围为 52.83-247.98ng g(-1)干重（ng g(-1) dw）。艾氏剂是最主要的化合物，其次是氯丹、六氯环己烷（HCHs）和硫丹，而滴滴涕（DDTs）和甲氧氯仅以低得多的浓度被检出。组成分析表明，OCPs 主要来自历史上使用的农药的大气传输。由于靠近潜在污染源和周围人类活动强度的影响，塔吉克斯坦西部和西北部的 OCP 残留量高于东部和东南部。此外，OCPs 与海拔之间的相关性分析表明，与滴滴涕等挥发性较低的污染物相比，更易挥发的污染物（如 HCH 异构体）似乎更容易在海拔较高的地区富集。
