GER Department, Laboratoire Central des Ponts et Chaussées, Bouguenais, France.
Environ Technol. 2011 Jul;32(9-10):1141-9. doi: 10.1080/09593330.2010.528045.
A study has been carried out as part of the mission assigned to IRSTV (Research Institute of Urban Sciences and Techniques), a federative research network supported by the Loire Valley Region, with the objective of characterizing atmospheric deposition, roof runoff and street runoff in a small (31 ha) suburban catchment in Nantes equipped with a separate sewer system. Trace metals, polycyclic aromatic hydrocarbons (PAHs) and pesticides were investigated. The characterization of atmospheric deposition reveals a high variability of trace metal concentrations, which could not be explained by rainfall characteristics. The relative abundance order of the metals was as follows: Zn > Cu > Cr approximately Ni > Cd. Organic pollutants, i.e., PAHs and pesticides, were only rarely detected in the atmospheric deposition. Zn and Pb appear to be the major contaminants in runoff water, whereas the concentrations of Ni, Cu, Cr, Cd, PAHs and pesticides tend to remain low. On the whole, concentrations were similar to the lowest range reported in the literature. According to statutory thresholds, runoff water quality is poor because of the high Pb and Zn concentrations. Based on scanning electron microscopy observations, atmospheric particles do not apparently differ from runoff particles, with a predominance of pollen, bacteria and particles resulting from soil erosion. Spherical organic particles produced during fuel combustion have also been observed.
本研究是为了完成 IRSTV（城市科学与技术研究所）的任务而进行的，IRSTV 是由卢瓦尔河谷地区支持的一个联邦研究网络，其目标是对配备有独立下水道系统的南特市一个 31 公顷的小型郊区流域中的大气沉降、屋顶径流和街道径流进行特征描述。研究中调查了痕量金属、多环芳烃（PAHs）和农药。大气沉降物的特征描述表明，痕量金属浓度的变化很大，无法用降雨量特征来解释。金属的相对丰度顺序为：Zn＞Cu＞Cr≈Ni＞Cd。有机污染物，即 PAHs 和农药，在大气沉降物中很少被检测到。Zn 和 Pb 似乎是径流水中的主要污染物，而 Ni、Cu、Cr、Cd、PAHs 和农药的浓度则趋于保持较低水平。总的来说，浓度与文献中报道的最低范围相似。根据法定阈值，由于 Pb 和 Zn 浓度较高，径流水质较差。根据扫描电子显微镜观察，大气颗粒与径流颗粒没有明显区别，主要包括花粉、细菌和土壤侵蚀产生的颗粒。还观察到了在燃料燃烧过程中产生的球形有机颗粒。
