Analysis and Evaluation of Heavy Metal Content in Remixing Soil by Feldspathic Sandstone and Sand in Mu Us Sandy Land, China

3rd International Symposium on Resource Exploration and Environmental Science

生态环境科学

Zhe, Pang^1^2^3^4 ; Juan, Li^1^2^3^4 ; Qilong, Wang^1

Shaanxi Provincial Land Engineering Construction Group Co., Ltd., Xi'an

710075, China^1

Key Laboratory of Degraded and Unused Land Consolidation Engineering, Ministry of Natural Resources, Xi'an

710075, China^2

Shaanxi Provincial Land Consolidation Engineering Technology Research Center, Xi'an

710075, China^3

Institute of Land Engineering and Technology, Shaanxi Provincial Land Engineering Construction Group Co., Ltd., Xi'an

710075, China^4

关键词: Analysis and evaluation;    Cultivated lands;    Ecological risks;    Heavy metal contents;    Heavy metal pollution;    Positive correlations;    Potential ecological risk;    Soil environment;   

Others  :  https://iopscience.iop.org/article/10.1088/1755-1315/300/3/032100/pdf
DOI  :  10.1088/1755-1315/300/3/032100

学科分类：环境科学（综合）

来源: IOP

【 摘 要 】

In order to ensure the quality of cultivated land with the technology of remixing soil by feldspathic sandstone and sand, the concentrations of eight heavy metals were measured, and the degree of heavy metal pollution in the soil was assessed by Nemerow index and potential ecological risk index. The results showed that, compared with feldspathic, the concentrations of Cr, Ni, Cu, Zn, As, Cd and Pb in the remixing soil decreased by 12.8%, 40.7%, 44.1%, 49.3%, 49.8%, 37.6% and 14.1% respectively. The concentrations of eight heavy metals in sandstone and remixing soil were not significantly different in space, but in sand vary greatly. There was very significant positive correlation among the contents of Ni, Cu, Zn, As, Cd and Pb in the remixing soil, which indicates that the heavy metals have obvious homology. The single pollution index of heavy metals in remixing soil, feldspathic sandstone and sand were all less than one, and the comprehensive pollution index were 0.611, 0.980 and 0.395 respectively. The potential ecological risk index (RI) of heavy metals in remixing soil, feldspathic sandstone and sand were all less than 150, indicating that the soils with three textures showed low ecological risks. After three years of planting, the potential ecological risk index of heavy metals in the remixing soil increased slightly, but the single pollution index was also less than one. The research shows that the remixing soil in Mu Us Sandy Land can ensure the quality of soil environment and the safety of agricultural products.