Dunarea de Jos University of Galati, Faculty of Sciences and Environment, Department of Chemistry, Physics and Environment, 47 Domneasca St., 800008 Galati, Romania.
Sci Total Environ. 2012 Nov 15;439:76-86. doi: 10.1016/j.scitotenv.2012.09.004. Epub 2012 Oct 10.
The aim of this work was to determine the concentrations of organochlorine pesticides (OCPs) and polycyclic aromatic hydrocarbons (PAHs) in topsoils (n=17) at two sampling depths in Southeastern Romania, including industrial (Galati iron and steel plant) and agricultural sites in Galati and Braila counties, as well as nature reserves such as Lower Prut Meadow (Galati County) and Bugeac Lake (Constanta County), and to compare them with national guidelines and values reported for other regions. The total detectable OCP concentrations vary in the ranges 58-1662ngg(-1) dry weight (dw) for 0-5cm depth and 6-12,644ngg(-1) dw for 5-20cm depth. Of these, the concentrations of HCHs, DDTs, and heptachlor varied in the ranges 6-6818ngg(-1), 27-5826ngg(-1), and 108-873ngg(-1) dw, respectively, the highest values being registered near a cultivated area, located in the proximity of Siret River and Galati town, probably due to extensive use of pesticides in the past. Chlordane was detected only at one industrial site in Galati (53ngg(-1) dw), while the levels of aldrin, dieldrin, endrin and mirex were below the detection limits in all the locations and for both depths. The total PAH concentrations for 5-20cm depth range from 9ngg(-1) (Lower Prut Meadow) to 25,352ngg(-1) dw (cattle farm), being lower than those reported for the upper 5cm layer. The PAH distribution pattern in this study is in agreement with that previously obtained for surface soils from Lower Prut Meadow (prevalence of 3-ring PAHs), industrial area and farmland (prevalence of 4- and 5-ring PAHs), their sources being industrial activity, traffic and agricultural waste burning. Carcinogenic PAHs contribute 44.8-56.4% for 5-20cm and 43.7-55.8% for 0-5cm depth to total PAHs. In some locations the HCH, DDT and PAH amounts exceed the legal values.
本研究的目的是测定罗马尼亚东南部表层土壤（n=17）中有机氯农药（OCPs）和多环芳烃（PAHs）的浓度，包括加拉茨县的工业（加拉茨钢铁厂）和农业区以及Lower Prut Meadow（Galati 县）和 Bugeac 湖（Constanta 县）等自然保护区，并将其与国家指导值和其他地区报道的值进行比较。0-5cm 深度处总可检出 OCP 浓度范围为 58-1662ngg(-1)干重（dw），5-20cm 深度处总可检出 OCP 浓度范围为 6-12644ngg(-1) dw。其中，HCHs、DDTs 和七氯的浓度范围分别为 6-6818ngg(-1)、27-5826ngg(-1)和 108-873ngg(-1) dw，最高值出现在塞雷特河和加拉茨镇附近的一个耕作区附近，可能是由于过去大量使用农药所致。氯丹仅在加拉茨的一个工业点检测到（53ngg(-1) dw），而艾氏剂、狄氏剂、异狄氏剂和灭蚁灵在所有地点和两个深度的浓度均低于检测限。5-20cm 深度处总 PAH 浓度范围为 9ngg(-1)（Lower Prut Meadow）至 25352ngg(-1) dw（牛场），低于上层 5cm 层报道的值。本研究中的 PAH 分布模式与 Lower Prut Meadow 表层土壤（三环 PAH 为主）、工业区和农田（四环和五环 PAH 为主）的先前研究结果一致，其来源为工业活动、交通和农业废物燃烧。致癌性 PAH 对 5-20cm 层总 PAH 的贡献率为 44.8-56.4%，对 0-5cm 层总 PAH 的贡献率为 43.7-55.8%。在一些地点，HCH、DDT 和 PAH 的含量超过了法定值。
