PM_2.5 and PM_2.5–10 concentrations, elemental constituents, and sources in a densely populated coastal industrial area (Trombay, Mumbai) were investigated in 2010 and 2011. The PM_2.5 and PM_2.5–10 concentrations were 13.50–71.60 and 22.40–127.78 μg/m³, respectively. The daily PM_2.5 concentrations exceeded the Indian Central Pollution Control Board limit (60 μg/m³) several days in winter. Of the elements analyzed, Si then Al had the highest concentrations in PM_2.5–10, but black carbon then Si had the highest concentrations in PM_2.5. The element concentrations varied widely by season. Al, Ca, Fe, Si, and Ti concentrations were highest in summer, Cl, Mg, and Na concentrations were highest in the monsoon season, and the other trace metal concentrations in both PM_2.5 and PM_2.5–10 were highest in winter. The PM_2.5 and PM_2.5–10 sources were apportioned by positive matrix factorization. PM_2.5 and PM_2.5–10 had six dominant sources, crustal material (8.7% and 25.3%, respectively), sea salt spray (6.1% and 15.0%, respectively), coal/biomass combustion (25.5% and 13.8%, respectively), fuel oil combustion (19.0% and 11.2%, respectively), road traffic (17.7% and 12.6%, respectively), and the metal industry (10.6% and 7.0%, respectively). Anthropogenic sources clearly contributed most to PM_2.5 but natural sources contributed most to PM_2.5–10.

PM _2.5和PM _2.5-10浓度，元素组分，和在人口稠密沿海工业区（特朗贝，孟买）源在2010年和2011年的PM进行了调查_2.5和PM _2.5-10浓度分别为13.50-71.60和22.40-127.78分别为μg/ m ³。冬季几天，每天的PM _2.5浓度超过了印度中央污染控制委员会的限值（60μg/ m ³）。在分析的元素中，Si然后是Al在PM _2.5-10中的浓度最高，但是黑碳然后Si在PM _2.5中的浓度最高。。元素浓度随季节变化很大。夏季，Al，Ca，Fe，Si和Ti的浓度最高，季风季节Cl，Mg和Na的浓度最高，而PM _2.5和PM _2.5-10的其他微量金属浓度在冬季最高。PM _2.5和PM _2.5-10的来源通过正矩阵分解进行分配。PM _2.5和PM _2.5-10有六个主要来源，地壳物质（分别为8.7％和25.3％），海盐喷雾（分别为6.1％和15.0％），煤/生物质燃烧（分别为25.5％和13.8％），燃料燃烧（19.0％）和11.2％），道路交通（分别为17.7％和12.6％）和金属行业（分别为10.6％和7.0％）。显然，人为来源对PM _2.5的贡献最大，而自然来源对PM _2.5-10的贡献最大。