Air Pollution Control Division, National Environmental Engineering Research Institute (NEERI), Nehru Marg, Nagpur 440 020, India.
Bull Environ Contam Toxicol. 2012 Feb;88(2):260-4. doi: 10.1007/s00128-011-0445-2. Epub 2011 Oct 28.
Particulate size distribution of PM(10) and associated trace metal concentrations has been carried out in residential cum commercial area of Mahal at Nagpur city. Sampling for size fraction of particulate matter was performed during winter season using eight-stage cascade impactor with a pre-separator and toxic metals were analyzed using inductively coupled plasma-optical emission spectroscopy (ICP-OES). The average concentration of PM(10) and fine particulate matter (effective cut of aerodynamic diameter ≤2.2 μm) was found to be 300 and 136.7 μg/m(3), respectively which was exceeding limit of Central Pollution Control Board. Maximum mass concentration of 41 μg/m(3) in size range of 9.0-10.0 μm and minimum mass concentration of 19 μg/m(3) in size range 2.2-3.3 μm was observed. Metals (Sr, Ni and Zn) were found to large proportions in below 0.7 μm particle size and could therefore pass directly into the alveoli region of human respiratory system. Factor analysis results indicated combustion and vehicular emission as the dominant source in fine mode and resuspended dust was dominant in medium mode while crustal along with vehicular source was major in coarse mode of particulate matter.
在那格浦尔市的马哈尔商住区进行了 PM(10)和相关痕量金属浓度的颗粒物粒径分布研究。使用带有预分离器的八级冲击式采样器在冬季对颗粒物的粒径进行了采样，并使用电感耦合等离子体-光学发射光谱法（ICP-OES）对有毒金属进行了分析。发现 PM(10)和细颗粒物（有效空气动力学直径≤2.2 μm 的切割粒径）的平均浓度分别为 300 和 136.7 μg/m(3)，超过了中央污染控制委员会的限值。在 9.0-10.0 μm 的粒径范围内观察到最大质量浓度为 41 μg/m(3)，在 2.2-3.3 μm 的粒径范围内观察到最小质量浓度为 19 μg/m(3)。发现金属（Sr、Ni 和 Zn）在小于 0.7 μm 的粒径中占很大比例，因此可以直接进入人体呼吸系统的肺泡区域。因子分析结果表明，在细颗粒物模式中，燃烧和车辆排放是主要来源，而在中颗粒物模式中，再悬浮灰尘是主要来源，而在粗颗粒物模式中，地壳和车辆源是主要来源。
