Graduate Program in Environmental Engineering, Federal University of Technology, Av. Pioneiros 3131, Londrina, PR, 86036-370, Brazil; Department of Civil and Resource Engineering, Dalhousie University, 1360 Barrington Street, Halifax, Nova Scotia, B3H 4R2, Canada.
Graduate Program in Environmental Engineering, Federal University of Technology, Av. Pioneiros 3131, Londrina, PR, 86036-370, Brazil.
Environ Pollut. 2018 Nov;242(Pt A):539-543. doi: 10.1016/j.envpol.2018.07.003. Epub 2018 Jul 5.
In 2015, a controversial bicycle lane was installed on Paulista Avenue -a thoroughfare in the heart of the megacity of São Paulo with a high rate of motorised vehicles. For the first time, on-bicycle air pollution concentrations were assessed along this lane using black carbon (BC) as an indicator of fossil fuel combustion. We measured BC concentrations with a hand-held microaethalometer at a high temporal resolution, enabling the capture of fine spatial gradients along the route. Although this new link expanded the city's cycling network, our pioneering study showed that BC concentrations were large (mean 8.5 μg m) with extreme values reaching 24.0 μg m, comparable to concentrations found in many megacities. In agreement with other studies, we observed that concentrations decreased about 1.6 times on a section of the bicycle lane running through a calmer neighbourhood, which could indicate the potential to safeguard the health of cyclists by installing lanes with greater separation from main roads, such as Paulista Avenue. This pilot work paves the way to more detailed studies aiming to map out the spatial distribution of other traffic-related pollutants across the city's 458-km long bicycle network.
2015 年，在巴西圣保罗市中心的主干道保利斯塔大道上设置了一条颇具争议的自行车道，这条道路上机动车的数量非常多。这是首次使用黑碳（BC）作为化石燃料燃烧的指标，来评估这条车道上的自行车道的空气污染物浓度。我们使用手持微光度计以高时间分辨率测量 BC 浓度，从而能够捕捉到沿途的精细空间梯度。尽管这条新的连接扩大了城市的自行车网络，但我们的开创性研究表明，BC 浓度很大（平均值为 8.5μg/m），极值达到 24.0μg/m，与许多大城市的浓度相当。与其他研究一致，我们观察到在穿过一个较安静街区的自行车道部分，浓度降低了约 1.6 倍，这可能表明通过安装与主要道路（如保利斯塔大道）有更大隔离的车道，有保护自行车手健康的潜力。这项初步研究为更详细的研究铺平了道路，旨在绘制全市 458 公里长的自行车网络中其他与交通相关的污染物的空间分布。
