In the present study, in situ lichens (Flavoparmelia caperata) were used to assess the deposition of atmospheric trace elements in the metropolitan area of Huancayo (Junín, Peru). In total, ten sampling sites were chosen and categorized as urban, peri-urban (rural-urban) and rural areas according to land use. In addition, samples were also collected from a non-contaminated area categorized as a control site. The concentrations of 16 trace elements were measured using an inductively coupled plasma mass spectrometer (ICP-MS) and examined by enrichment factor (EF), hierarchical cluster analysis (HCA), and principal component analysis (PCA). Twelve of the 16 trace elements in urban and peri-urban sites present concentration higher than those at the rural and control sites (p < 0.05). The EF results revealed significant enrichment (at least twice that of the control site) of Ba, Cr, Cd, Pb, Sb, V, and Zn at most sites. PCA and HCA showed that more elements were derived from vehicular sources and fewer from agricultural and natural sources.

在本研究中，使用原位地衣（Flavoparmelia caperata）评估了Huancayo大都会地区（秘鲁胡宁）中大气微量元素的沉积。总共选择了十个采样点，并根据土地用途将其分类为城市，郊区（农村-城市）和农村地区。此外，还从分类为对照地点的非污染区域收集了样品。使用电感耦合等离子体质谱仪（ICP-MS）测量16种微量元素的浓度，并通过富集因子（EF），层次聚类分析（HCA）和主成分分析（PCA）进行检查。在城市和城郊地区16种微量元素中，有12种的浓度高于农村地区和对照地区（p <0.05）。EF结果表明，在大多数位点，Ba，Cr，Cd，Pb，Sb，V和Zn的富集程度（至少是对照位点的两倍）。PCA和HCA表明，更多的元素来自车辆，而农业和自然资源则更少。