Hydraulic Engineering and Environmental Research Group, Universidad Nacional de Colombia Sede Manizales, Cra 27 64-60 Bloque H Palogrande, Manizales, Colombia.
Energy, Materials and Environment Laboratory, Department of Chemical Engineering, Universidad de La Sabana, Campus Universitario Puente del Común, Km. 7 Autopista Norte, Bogotá 250001, Colombia.
Sci Total Environ. 2016 Oct 15;568:614-623. doi: 10.1016/j.scitotenv.2016.02.094. Epub 2016 Mar 4.
Passive air-sampling data of polychlorinated dibenzo-p-dioxins (PCDDs), polychlorinated dibenzofurans (PCDFs) and dioxin-like polychlorinated biphenyls (dl-PCBs) taken in Manizales (a medium-sized city) and Bogotá (a megacity), Colombia, were analyzed in order to identify potential sources of pollution and the possible influence of meteorological variables like temperature and precipitation. The results indicate important differences in levels of PCDD/Fs and dl-PCBs between Bogotá and Manizales, attributed to differences in site characteristics and potential local/regional sources. Higher PCDD/Fs concentrations were observed in Bogotá (373fg/m(3)) compared to those observed in Manizales, with mean levels ranging from 64fg/m(3) in a residential zone to 151fg/m(3) around a vehicular-influenced area. Higher dl-PCBs concentrations were observed in the industrial area of Manizales compared to those observed in Bogotá, with mean levels of 6668fg/m(3) and 4388fg/m(3) respectively. In terms of PCDD/Fs congener distribution, there was a predominance of octachlorodibenzodioxin (OCDD) followed by 1,2,3,4,6,7.8-heptachlorodibenzofuran (HpCDF) congeners, with both cities showing higher levels in zones of high vehicular activity. Industrial influence was most evident in dl-PCB levels. In comparison to the mean levels of dl-PCB congeners obtained in the vehicular zones of Bogotá and Manizales, the industrially influenced sampling stations showed higher concentrations of dl-PCB congeners. Passive sampling results suggested that congener concentration profiles are characteristic of their different emission sources, and can be used to distinguish between their industrial or vehicular origins.
采集了哥伦比亚马拉开佩斯（中型城市）和波哥大（大城市）的多氯二苯并对二恶英（PCDDs）、多氯二苯并呋喃（PCDFs）和类似二恶英的多氯联苯（dl-PCBs）的被动空气采样数据，以识别潜在的污染来源，以及温度和降水等气象变量的可能影响。结果表明，波哥大和马拉开佩斯之间 PCDD/Fs 和 dl-PCBs 的水平存在重要差异，这归因于站点特征和潜在的本地/区域来源的差异。在波哥大观察到的 PCDD/Fs 浓度较高（373fg/m³），与在马拉开佩斯观察到的浓度相比，其浓度范围从住宅区的 64fg/m³到受车辆影响的区域的 151fg/m³。在马拉开佩斯的工业区观察到的 dl-PCBs 浓度较高，与在波哥大观察到的浓度相比，分别为 6668fg/m³和 4388fg/m³。在 PCDD/Fs 同系物分布方面，八氯二苯并二恶英（OCDD）占主导地位，其次是 1,2,3,4,6,7,8-七氯二苯并呋喃（HpCDF）同系物，两个城市在高车辆活动区都显示出更高的水平。工业影响在 dl-PCB 水平上最为明显。与波哥大和马拉开佩斯车辆区获得的 dl-PCB 同系物平均水平相比，受工业影响的采样站显示出更高浓度的 dl-PCB 同系物。被动采样结果表明，同系物浓度分布特征与其不同的排放源有关，可以用来区分其工业或车辆来源。
