A full congener-specific determination of polychlorinated biphenyls (PCBs) was conducted for street dusts in some areas in northern Vietnam. Total 209 PCB concentrations (median and range) of 14 (2.2–120), 11 (6.6–32), and 0.25 (0.10–0.97) ng g⁻¹ were measured in the street dusts from an industrial park, an urban area, and a rural commune, respectively, suggesting environmental loads of PCBs related to industrialization and urbanization in northern Vietnam. PCB patterns of street dusts from the industrial park were dominated by lightly chlorinated homologs (tri- and tetra-CBs), while more highly chlorinated homologs (penta- and hexa-CBs) were the major contributors to total PCBs in the urban samples, indicating different emission sources. Linear correlations of log-transformed sum of 7 indicator congeners with total PCBs and sum of dioxin-like PCBs were observed. PCB-11, an inadvertently produced congener of pigment manufacturing processes, was detected in all the samples with more elevated proportions in the urban and rural areas than industrial park. Our results have revealed complex emission sources of PCBs in the study areas, including both historical (e.g., the past usage of imported PCB-containing oils and old electric equipment) and current sources such as releases from industrial activities and increasing use of new consumer products. Occupationally exposed persons (e.g., street sweepers, street vendors, and traffic policemen) and children in the urban and industrial areas were estimated to receive much higher doses of dust-bound PCBs than general population, suggesting the need for appropriate protection conditions.

在越南北部的某些地区，对街头尘埃进行了针对同类物的全面测定，即多氯联苯（PCBs）的测定。209种PCB的总浓度（中位数和范围）分别为14（2.2-120），11（6.6-32）和0.25（0.10-0.97）ng g ^-1分别从工业园区，市区和农村公社的街道灰尘中进行了测量，表明越南北部与工业化和城市化有关的多氯联苯的环境负荷。工业园区街道粉尘的多氯联苯模式主要由轻度氯化的同系物（三和四CBs）主导，而较高氯化度的同系物（五和六CBs）是城市样本中多氯联苯总量的主要贡献者，表明不同的排放源。观察到了7种指示物同类物的对数转换总和与总PCB以及二恶英样PCB的总和之间的线性相关性。在所有样品中检测到PCB-11是颜料生产工艺的一种偶然产生的同类，在城市和农村地区所有样品中的含量都比工业园区高。我们的结果揭示了研究领域中多氯联苯的复杂排放源，包括历史（例如，过去使用的进口含多氯联苯的油和旧电气设备的使用）和当前排放源，例如工业活动的释放和新消费产品的使用增加。据估计，城市和工业区的职业暴露者（例如，清道夫，街头小贩和交通警察）和儿童接受的粉尘多氯联苯剂量要比普通人群高得多，这表明需要适当的保护条件。