Observations of particulate matter less than 10 µm (PM₁₀) were conducted from January to December in 2015 in the Ciuc basin, Eastern Carpathians, Romania. Daily concentrations of PM₁₀ ranged from 10.90 to 167.70 µg/m³, with an annual mean concentration of 46.31 µg/m³, which is higher than the European Union limit of 40 µg/m³. Samples were analyzed for a total of 21 elements. O, C and Si were the most abundant elements accounting for about 85% of the PM₁₀ mass. Source identification showed that the elemental composition of PM₁₀ is represented by post volcanic activity, crustal origin, and anthropogenic sources, caused by the resuspension of crustal material, sea salt and soil dust. The average PM₁₀ composition was 72.10% soil, 20.92% smoke K, 13.84% salt, 1.53% sulfate and 1.02% organic matter. The back-trajectory analysis showed that the majority of PM₁₀ pollution comes from the West, Southwest and South.

2015年1月至12月，在罗马尼亚东部喀尔巴阡山脉的Ciuc盆地对小于10 µm（PM ₁₀）的颗粒物进行了观测。PM _10的日浓度范围为10.90至167.70 µg / m ³，年平均浓度为46.31 µg / m ³，高于欧盟的40 µg / m ³限值。分析样品中的总共21种元素。O，C和Si是最丰富的元素，约占PM ₁₀质量的85％。来源鉴定表明，PM ₁₀的元素组成地壳物质，海盐和土壤尘埃的重悬引起的火山后活动，地壳成因和人为源的特征。PM ₁₀的平均成分为72.10％的土壤，20.92％的烟气K，13.84％的盐，1.53％的硫酸盐和1.02％的有机物。反向轨迹分析显示，PM _10的污染主要来自西部，西南和南部。