Magnetic properties of atmospheric dustfall from different source region and its environmental significance

doi:10.3969/j.issn.1000-5641.2016.04.018

Abstract

Abstract:

In order to study the indication effect of magnetic properties of atmospheric dustfall on the pollution source, magnetic parameters, mineral composition, morphology and particle size were measured on atmospheric dustfall from different source region of cement factory, quartz sand factory and county seat. Results showed that dustfall mainly came from the local matter, the dustfall of quartz sand factory was monomineral with morphology of granular structure, its main component was quartz with coarse grain size and angular shape. The dustfall of cement factory was sheet and irregularly granular aggregation, its principal constituents were silicates and carbonates. The dustfall of county seat was granular and flocculent, the component was complex, whose main elements were Si!Al!Na!Ca!Fe and so on. The magnetic mineral content of dustfall changed with seasons, it was higher in winter. The magnetic mineral content of dustfall from different source region was not the same, the dustfall of county seat was the highest, its magnetic parameters can be a good indicator of pollution sources. The atmosphere pollution of quartz sand factory and cement factory was serious, their average values of monthly dustfall were far higher than county seat, but the magnetic mineral content of these two kinds of industrial dustfall was lower than county seat, and their magnetic characteristics was similar. We must combine with their mineral composition, morphology and particle size to distinguish, then set up connection.

Key words: different source region, atmospheric dustfall, magnetic properties, environmental significance

LI Yong, ZOU Chang-ming, YAO Jie. Magnetic properties of atmospheric dustfall from different source region and its environmental significance[J]. Journal of East China Normal University(Natural Sc, doi: 10.3969/j.issn.1000-5641.2016.04.018.

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