The Difference in Magnetic Properties of Topsoil Between Industrial Areas and Commercial Areas in Bengbu City and Its Environmental Significance
In order to study the influence of industrial activities on the magnetic properties of topsoil in Bengbu City,33 topsoil samples are collected in the industrial area of Bengbu City and 29 topsoil samples are collected in the commercial area.The magnetic parameters and mineral composition of the two types of topsoil samples are measured.The results show that the magnetic properties of the two types of topsoil samples are mainly dominated by magnetite.The industrial topsoil samples have a higher content of magnetic minerals with coarse particle size and the low content of SP particles.The commercial topsoil samples have a lower content of magnetic minerals with fine particle size and high content of SP particles.The main component of two types of topsoil samples is quartz,and there are also minerals such as kaolinite,illite,plagioclase,calcite and magnetite.Due to the influ-ence of industrial dust,the magnetic characteristics of the topsoil in the industrial area are different from those in the commercial area.The content of magnetic minerals increases,the magnetism enhances,the particle size of magnetic minerals becomes coarser,and the magnetic susceptibility shows a weak correlation with frequency mag-netic susceptibility.The changes of magnetic parameters in the industrial topsoil reflect the degree of influence of industrial activities on urban topsoil.Therefore,the difference in magnetic properties of topsoil between industrial areas and commercial areas reflects the environmental quality of topsoil in Bengbu City.