Gupta A K, Nag Subhankar, Mukhopadhyay U K
Department of Civil Engineering, Indian Institute of Technology, Kharagpur, India.
J Environ Sci Health A Tox Hazard Subst Environ Eng. 2006;41(3):431-45. doi: 10.1080/10934520500428310.
The 24-hour concentrations of total suspended particulate matter (TSP) and respirable suspended particulates (PM(10)) were monitored during March 2003 to February 2004 from a network of 15 sampling stations along a populated urban corridor of Kolkata City in India. The air samplers were placed at a distance 20-200 m from roadways and their height from ground level was within 3 to 5 m. It was also insured that from any obstacle to the airflow was at least 30 cm away. Over the study area, the monthly average concentrations of TSP and PM(10) were found to be 200.3 +/-93.1 microg/m(3) and 95.8+/-67.5 microg/m(3), respectively, while the 24-hour average concentrations were in the range of 17--456 microg/m(3) and 15--291 microg/m(3), respectively. The higher average values at particular stations reflected the closeness of those to heavy road traffic. With regards to the temporal variations, higher concentrations were observed during winter and lower concentrations during monsoon. Statistical analysis of the sampling data was conducted to obtain general characteristics of the particulate pollution and to investigate the effects of traffic volume and meteorological factors on the pollution level. TSP and PM(10) concentrations were found to be highly correlated with each other at all the sampling stations. There were clear associations between TSP and PM(10) data set at all the measured 15 stations and on average, PM(10) was 52% of the total TSP concentration.
2003年3月至2004年2月期间，对印度加尔各答市人口密集的城市走廊沿线15个采样站组成的网络进行了总悬浮颗粒物（TSP）和可吸入悬浮颗粒物（PM₁₀）24小时浓度监测。空气采样器放置在距离道路20 - 200米处，其距地面高度在3至5米范围内。还确保采样器与气流的任何障碍物至少相距30厘米。在研究区域内，TSP和PM₁₀的月平均浓度分别为200.3±93.1微克/立方米和95.8±67.5微克/立方米，而24小时平均浓度分别在17 - 456微克/立方米和15 - 291微克/立方米范围内。特定站点的较高平均值反映了这些站点靠近繁忙道路交通的情况。关于时间变化，冬季观测到较高浓度，季风期间浓度较低。对采样数据进行了统计分析，以获取颗粒物污染的一般特征，并研究交通流量和气象因素对污染水平的影响。发现在所有采样站，TSP和PM₁₀浓度彼此高度相关。在所有测量的15个站点，TSP和PM₁₀数据集之间存在明显关联，平均而言，PM₁₀占总TSP浓度的52%。
