襄汾县褐土重金属的垂向分布特征及其与磁化率的相关性分析

[目的]为了解襄汾县土壤中Mn、Zn、Cu、Cr、Ni 5种重金属的垂向分布特征及其与磁化率的相关性、污染状况。[方法]通过对襄汾县主要土壤类型褐土下的7个土种剖面取样分析,并且根据国家土壤环境质量二级标准对襄汾县土壤环境质量进行了评价。[结果]7个土种剖面中多种金属元素的垂向分布均表现出一致的变化趋势。在0～20 cm范围内有明显的富集现象,20 cm以下各元素含量出现波动,土壤中Mn和Cu、Cr、Ni来自于同一污染源,Zn则可能来自于其他人为活动污染源。[结论]土壤重金属污染与土壤磁化率、土壤理化性质有密切的联系,重金属单因子污染指数指数均小于1.0,襄汾县土壤未受到污染,尚属清净,适合农业生产。

Vertical Distribution Characteristics of Soil Heavy Metals in Xiangfen County Brown Soil and Analysis of Relationship between Soil Heavy Metals and Magnetic Susceptibility

[Objective]The research aimed to study Mn,Zn,Cu,Cr and Ni in the different soil types of Xiangfen County and the correlation with its magnetic susceptibility.[Method] 7 profiles of the cinnamon soil were analyzed by sampling from Xiangfen County,and a deep research was made on the flux and the perpendicular characterization of Mn,Zn,Cu,Cr and Ni in the soil and the correlation with its magnetic susceptibility.An environmental assessment was conducted according to the state soil environment quality secondary standard.[Result] There was a consistent trend of the perpendicular characterization of the metals in 7 soil sections.An obvious enrichment phenomenon existed in 0-20 cm layer.However,an fluctuant characteristic was below 20 cm.The five metals had the same pollutant source.Obviously,Zn was derived from other kind of the pollutant.[Conclusion]There was a intimate relationship between the heavy metal pollution and the magnetic susceptibility and the physicochemical property.The single factor index of the heavy metal was below 1.0.The soil was unpolluted and had a big capacity in the agricultural industry.