西安市表层土壤和地表灰尘理化性质分析

以西安城市表层土壤和地表灰尘为研究对象,分析其基本理化指标。结果表明,西安市表层土壤pH值的变化范围是7.65~8.54,属弱碱性。地表灰尘pH值的变化范围是6.59~11.19,属碱性。表层土壤的低频磁化率和高频磁化率均值分别为1.55×10^-6 m^3/kg和1.46×10^-6 m^3/kg,频率磁化率均值为6.7%。地表灰尘的低频磁化率和高频磁化率均值分别为5.50×10^-6 m^3/kg和4.84×10^-6 m^3/kg,频率磁化率均值为1.88%。表层土壤和地表灰尘中总有机碳均值分别为1.31%和3.97%。西安城市表层土壤和地表灰尘均主要以粉粒为主,且二者各理化性质之间均有一定的相关性。

Physical and Chemical Properties of Surface Soil and Dust in Xi an

The basic physical and chemical indexes of surface soil and dust in Xi'an were analyzed.The results showed that the variation range of pH value of surface soil were between 7.65 and 8.54,which belonged to weak alkalinity.The range of pH value of surface dust were between 6.59 and 11.19,which belonged to alkaline.The mean values of low-frequency and high-frequency susceptibility of surface soil were 1.55×10^-6 m^3/kg and 1.46×10^-6 m^3/kg,respectively,and the mean values of frequency susceptibility was 6.7%.The mean values of low-frequency and high-frequency susceptibility of surface dust were 5.50×10^-6 m^3/kg and 4.84×10^-6 m^3/kg,respectively,and the mean values of frequency susceptibility was 1.88%.TOC in surface soil and dust were 1.31%and 3.97%respectively.The surface soil dust in Xi'an were mainly composed of silt particles,and there was a certain correlation between the physical and chemical properties of the surface soil and surface dust.