| A Study of Suspended Particulate Matter in Lahore (Pakistan) |
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| 作者姓名： | K.Hussain Ruby Riffat A.Shaukat M.Ashraf Siddiqui |
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| 作者单位： | Centre for Solid State Physics，University of the Punjab，New campus，Lahore 54590 (Pakistan)，Department of Physics，University of the Punjab，New Campus，Lahore 54590 (Pakistan)，Department of Physics，University of the Punjab，New Campus，Lahore 54590 (Pakistan)，Institute of Geology，University of the Punjab.New Campus，Lahore 54590 (Pakistan). |
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| 摘 要： | The results obtained from an investigation of suspended particulate matter in the metropolitan city of Lahore (Pakistan) are reported and analysed in this paper. X-ray diffraction studies of the airborne matter collected from various urban and suburban sites show that non-clay minerals such as quartz, calcite and albite are contained in most of the samples in almost comparable amounts. Chemical analysis of some samples was carried out for complementing the x-ray diffraction data. The amount of quartz in the samples of dusty areas was found to be an order of magnitude more than in the samples of relatively cleaner areas. As the dust particles of these compounds are poor substrate for promoting nucleation of ice in the atmospheric clouds, they are liable to stay steadily in the atmosphere as pollutants.A comparison of the results of the airborne particulates and the soil samples collected from various sites show that the sources of quartz, calcite and albite in the airborne matter are both local and remot
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