加纳的有机氯农药大气负荷。
Atmospheric burden of organochlorine pesticides in Ghana.
机构信息
Department of Environmental Science, College of Science, Kwame Nkrumah University of Science and Technology, Kumasi, Ghana; Graduate School of Environment and Information Sciences, Yokohama National University, 79-7 Tokiwadai, Hodogaya-ku, Yokohama, Kanagawa 240-8501, Japan.
National Institute of Agro-Environmental Sciences, Tsukuba, Ibaraki 305-8604, Japan.
出版信息
Chemosphere. 2014 May;102:1-5. doi: 10.1016/j.chemosphere.2013.10.019. Epub 2013 Nov 5.
Organochlorine pesticides (OCPs) are subject to the Stockholm Convention on POPs and have been banned or restricted globally. In Ghana, concerns of illicit applications of some OCPs have been raised in recent times. Applying polyurethane foam (PUF) disk passive air samplers (PAS), the levels of OCPs in the atmosphere and their spatial resolution were investigated. It was the first nationwide coverage of OCPs monitoring in Ghana. ∑DDTs and endusulfans constituted the highest burden of atmospheric OCPs in Ghana, at average concentrations of 156±36 and 153±28 pg m(-3), respectively. Mirex had the lowest concentration (0.2±0.01 pg m(-3)). From the chemical signatures of the various OCPs, we deduced that DDT, endosulfans and heptachlor were freshly applied at certain sites, which were all agricultural sites. The OCPs were spatially resolved as a function of the types of crops cultivated in different areas, legacy issues and recent applications.
有机氯农药（OCPs）受《关于持久性有机污染物的斯德哥尔摩公约》的约束，已在全球范围内被禁用或限制使用。最近，加纳也开始关注一些 OCPs 的非法使用问题。本研究采用聚氨酯泡沫（PUF）圆盘被动空气采样器（PAS），调查了大气中 OCPs 的水平及其空间分辨率。这是加纳首次对 OCPs 进行全国范围的监测。∑DDTs 和硫丹是加纳大气中 OCPs 的主要污染物，平均浓度分别为 156±36 和 153±28 pg m(-3)。灭蚁灵的浓度最低（0.2±0.01 pg m(-3)）。从各种 OCPs 的化学特征来看，我们推断 DDT、硫丹和七氯在某些地点（均为农业地点）最近被新使用过。OCPs 的空间分辨率取决于不同地区种植的作物类型、遗留问题和近期应用情况。
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