This study examines the contamination levels and sources of 32 metals and metalloids (MMs) in environmental compartments (roadside soil, road dust, and river suspended sediments) of a small urbanized river catchment located in Moscow megacity. MMs partitioning between particle size fractions (PM₁₀₀₀, PM_1-10, and PM₁) was analyzed by ICP-MS and ICP-AES methods. The pollution level of particle size fractions with MMs decreases in the following series: road dust > suspended sediments > soils. Absolute principal component analysis with multiple linear regression (PCA/APCS-MLR) shows that in both relatively coarse (PM_1-10) and fine (PM₁) fractions, traffic emissions are the primary contributors to pollution, whereas natural sources are dominant providers of chemical elements in bulk samples (PM₁₀₀₀). The predominance of fractions with a diameter over 10 μm in all three studied compartments indicates that the mineral matrix of all compartments is formed predominantly by natural material. Across all compartments and their fractions, Sb, Cd, Zn, Mo, W, Sn, Cu, Pb, and Bi are consistently accumulated. PM₁ and PM_1-10 particles of road dust and suspended sediments also absorb Ni and Cr, suspended sediments retain Mn and As, and soils additionally accumulate As. Anthropogenic influence is more pronounced in PM₁ and PM_1-10 particles compared to bulk samples due to a large impact of industrial sources, traffic, construction activities, and waste storage. Polluted soils are an additional source of MMs to PM₁ and PM_1-10 of road dust and PM_1-10 of suspended sediments, and road dust acts as a source of MMs to PM_1-10 of soils.

中文翻译：

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金属和准金属污染水平、分区和莫斯科特大城市一个小型城市集水区环境隔间的污染源


本研究检查了位于莫斯科特大城市的一个小型城市化河流集水区的环境隔间（路边土壤、道路灰尘和河流悬浮沉积物）中 32 种金属和准金属 （MM） 的污染水平和来源。通过 ICP-MS 和 ICP-AES 方法分析粒径分数 （PM ₁₀₀₀ 、PM _1-10 和 PM ₁ ） 之间的 MMs 分配。MMs 的粒径分数污染水平在以下系列中降低：道路灰尘>悬浮沉积物>土壤。多元线性回归的绝对主成分分析 （PCA/APCS-MLR） 表明，在相对粗 （PM _1-10 ） 和细 （PM ₁ ） 馏分中，交通排放是污染的主要贡献者，而自然资源是散装样品 （PM ₁₀₀₀ ） 中化学元素的主要提供者。在所有三个研究的区室中，直径超过 10 μm 的馏分占主导地位，这表明所有区室的矿物基质主要由天然材料形成。在所有区室及其馏分中，Sb、Cd、Zn、Mo、W、Sn、Cu、Pb 和 Bi 始终累积。道路尘埃和悬浮沉积物的 PM ₁ 和 PM _1-10 颗粒也会吸收 Ni 和 Cr，悬浮沉积物保留 Mn 和 As，土壤还会积累 As。由于工业来源、交通、建筑活动和废物储存的巨大影响，与散装样品相比，PM ₁ 和 PM _1-10 颗粒的人为影响更为明显。受污染的土壤是道路扬尘 PM ₁ 和 PM _1-10 以及悬浮沉积物 PM _1-10 的额外来源，道路扬尘是土壤 MM 到 PM _1-10 的来源。