Magnetic Susceptibility of Dustfall in Xi’ an City from 2012 to 2013 and Its Environmental Significance

doi:10.11924/j.issn.1000-6850.casb15010245

Abstract

Abstract: The paper aims to understand the effects of dustfall on the environment in Xi’ an. The test on magnetic susceptibility was carried out with the dustfall samples of Xi’ an. These samples were collected monthly from January 2012 to December 2013. The magnetic parameters (χlf, χhf) indicated a relatively high concentration of magnetic minerals in Xi’an City, dominated by ferrimagnetic minerals. Magnetic susceptibility of dustfall was consistent with the Air Pollution Index (API), suggested that the χlf could demonstrate the air pollution of Xi’ an City. In summer the air quality was better and in winter the air was polluted strongly. The concentration of magnetic minerals and air quality had significant changes according to the seasons of each year, and the values rose from December to January of next year, and decreased in summer, which not only came from the pollution of coal-burning, but were also influenced by the special meteorological conditions of temperature inversion in winter.

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