Urban centers concentrate high levels of atmospheric pollutants, sourced by vehicular traffic, public transit systems, industrial emissions and agricultural emissions. This leads to the accumulation of gases and particulate matter (PM) which contribute to the degradation of historic buildings. Considering the importance of preserving historic structures, this manuscript examines the analysis of dangerous elements on the facades of two historic, UNESCO listed sites in Bordeaux, France, Grosse Cloche and Cathédrale St-André, due to the multiple influences of atmospheric pollutants, responsible for the degradation of historic buildings, in addition to causing possible compromises to human health. A total of 48 samples of particulate matter were collected between June 2018 and May 2019 using self-made passive samplers (SMPSs). Sedimented dust samples were collected from the same locations at the same time, one collection during each of the 4 seasons of the year. Analyses of accumulated ultrafine particles (UFPs) and nanoparticles (NPs) were performed on the collected samples. The results detected the presence of more than 800 organic NPs with high levels of toxic elements. Of these, 78% were detected in samples obtained via SMPS and the others in sedimented dust. 60% were shown to have a diameter of less than 50 nm. The authors suggest restoring the sampled historical structures for the benefit of humanity, in addition to increasing the rigor of public policies to control the release of particulate matter.

城市中心集中了高浓度的大气污染物，这些污染物来源于车辆交通、公共交通系统、工业排放和农业排放。这会导致气体和颗粒物 (PM) 的积聚，从而导致历史建筑的退化。考虑到保护历史建筑的重要性，本手稿分析了法国波尔多两个被联合国教科文组织列为历史古迹的遗址、大克洛什和圣安德烈大教堂的正面危险元素的分析，这是由于大气污染物的多重影响，负责历史建筑的退化，以及对人类健康造成可能的危害。2018 年 6 月至 2019 年 5 月期间，使用自制被动采样器 (SMPS) 共采集了 48 个颗粒物样本。在同一时间从相同地点收集沉积灰尘样本，在一年中的 4 个季节中的每个季节收集一次。对收集的样品进行累积超细颗粒 (UFP) 和纳米颗粒 (NP) 的分析。结果检测到超过 800 种有机 NPs 的有毒元素含量很高。其中，78% 在通过 SMPS 获得的样品中检测到，其他在沉积灰尘中检测到。60% 被证明具有小于 50 nm 的直径。作者建议为了人类的利益恢复采样的历史结构，此外还增加了控制颗粒物释放的公共政策的严格性。对收集的样品进行累积超细颗粒 (UFP) 和纳米颗粒 (NP) 的分析。结果检测到超过 800 种有机 NPs 的有毒元素含量很高。其中，78% 在通过 SMPS 获得的样品中检测到，其他在沉积灰尘中检测到。60% 被证明具有小于 50 nm 的直径。作者建议为了人类的利益恢复采样的历史结构，此外还增加了控制颗粒物释放的公共政策的严格性。对收集的样品进行累积超细颗粒 (UFP) 和纳米颗粒 (NP) 的分析。结果检测到超过 800 种有机 NPs 的有毒元素含量很高。其中，78% 在通过 SMPS 获得的样品中检测到，其他在沉积灰尘中检测到。60% 被证明具有小于 50 nm 的直径。作者建议为了人类的利益恢复采样的历史结构，此外还增加了控制颗粒物释放的公共政策的严格性。60% 被证明具有小于 50 nm 的直径。作者建议为了人类的利益恢复采样的历史结构，此外还增加了控制颗粒物释放的公共政策的严格性。60% 被证明具有小于 50 nm 的直径。作者建议为了人类的利益恢复采样的历史结构，此外还增加了控制颗粒物释放的公共政策的严格性。