The large surface area of Lake Victoria (about 68,800 km²) makes it vulnerable to high atmospheric deposition of chemical pollutants. We present measurements of polychlorinated biphenyls (PCBs) from the lake's atmospheric environment. High volume air (24 h) samples were collected within the northern Lake Victoria watershed in Uganda over two periods; 1999–2004 [at Kakira (KAK) and Entebbe (EBB)] and 2008–2010 (at EBB only). Precipitation samples were also collected monthly during the 2008–2010 period at EBB. Analysis for PCBs was done using GC-μECD in a dual column approach. The ranges of ΣPCB concentrations in the KAK air samples were 154–462 pg m⁻³ (KAK 1999–2000), 26.7–226 pg m⁻³ (KAK 2003–2004), 27.0–186 pg m⁻³ (EBB 2003), 46.8–174 pg m⁻³ (EBB 2004), 19.2–128 pg m⁻³ (EBB 2008), 45.8–237 pg m⁻³ (EBB 2009) and 65.6–244 pg m⁻³ (EBB 2010). The di-, tri-, tetra- and penta-PCBs were predominant in air sample sets while the tetra- and penta-PCBs were predominant in precipitation samples. The mean flux of ΣPCBs in the precipitation samples was 26.9 ng m⁻² (range of 14.8–41.5 and median of 27.5). Concentrations at EBB were lower than those reported elsewhere for urban sites in the East and Central African region. Multivariate analysis and analysis of air mass movements suggested influence of combustion sources on the PCB profiles from the region, especially, from the major East African urbanized regions.

维多利亚湖的大面积区域（约68,800 km ²）使其容易受到大气中化学污染物的高度沉积。我们目前从湖泊的大气环境中测量多氯联苯（PCBs）。在两个时期内，在乌干达的维多利亚湖北部流域内收集了大量的空气（24小时）样本。1999–2004 [在Kakira（KAK）和Entebbe（EBB））和2008–2010（仅在EBB）。在2008–2010年期间，EBB还每月收集一次降水样本。PCB的分析是使用GC-μECD采用双柱方法进行的。KAK空气样本中ΣPCB的浓度范围为154–462 pg m ^-3（KAK 1999–2000），26.7–226 pg m ^-3（KAK 2003–2004），27.0–186 pg m ^-3（EBB 2003），46.8–174 pg m ^-3（EBB 2004），19.2–128 pg m ^-3（EBB 2008），45.8–237 pg m ^-3（EBB 2009）和65.6–244 pg m ^-3（EBB 2010）。在空气样品组中，二，三，四和五氯联苯占主导地位，而在降水样品中，四，五氯联苯占主导地位。降水样品中ΣPCB的平均通量为26.9 ng m ^-2（范围为14.8–41.5，中位数为27.5）。EBB的浓度低于东部和中非地区城市地区的其他地区所报告的浓度。多变量分析和空气质量运动分析表明，燃烧源对该地区，特别是东非主要城市化地区的PCB分布有影响。