School of Resources and Civil Engineering, Suzhou University, Suzhou 234000, China.
National Engineering Research Center of Coal Mine Water Hazard Controlling, Suzhou 234000, China.
Int J Environ Res Public Health. 2020 Mar 27;17(7):2269. doi: 10.3390/ijerph17072269.
To understand the content, pollution, distribution and source and to establish a geochemical baseline of heavy metal elements in soil under the influence of high-density population, the concentrations of heavy metal elements Cr, Mn, Co, Ni, Cu, Zn, As, Cd, Hg, Pb and Fe were determined in 23 soil samples in Suzhou University, and geo-accumulation index, enrichment factor, principal component analysis, spatial analysis and regression analysis were completed. The results showed the following: The elements Cu and As were slightly polluted, while the other heavy metal elements were not. The elements Cd, Cu, Ni and As in soils were mainly caused by agricultural activities of chemical fertilizer, whereas the elements Zn and Hg were impacted by the chemicals and batteries. The heavy metal elements in the north were lower than in the south of the campus, as a whole. The enrichment of elements Cu, As and Cd was caused by the east-west river on the campus, and the enrichment of the elements Mn, Ni and Zn was induced by the reservoir. Biochemical experiments and vehicle parking influenced the spatial enrichment of Cr, Co and Pb, while domestic waste led to the spatial differentiation of Hg concentrations. The regression curve between heavy metal elements and Fe was established, and the background values of the heavy metals Cr, Mn, Co, Ni, Cu, Zn, As, Cd, Hg and Pb are 50.90, 489.37, 11.76, 37.74, 55.70, 58.22, 20.07, 0.09, 0.08 and 24.13 mg/kg, respectively.
为了了解重金属元素在高密度人口影响下土壤中的含量、污染、分布和来源，建立其地球化学基准线，本研究测定了苏州大学 23 个土壤样本中重金属元素 Cr、Mn、Co、Ni、Cu、Zn、As、Cd、Hg 和 Pb 的浓度，并完成了地质累积指数、富集因子、主成分分析、空间分析和回归分析。结果表明：Cu 和 As 元素有轻微污染，而其他重金属元素则没有。土壤中 Cd、Cu、Ni 和 As 元素主要是由化肥的农业活动造成的，而 Zn 和 Hg 元素则受到化学品和电池的影响。校园北部的重金属元素含量普遍低于南部。校园内东西向河流导致 Cu、As 和 Cd 元素的富集，水库则导致 Mn、Ni 和 Zn 元素的富集。生化实验和车辆停放影响了 Cr、Co 和 Pb 的空间富集，而生活垃圾则导致 Hg 浓度的空间差异。建立了重金属元素与 Fe 之间的回归曲线，重金属元素 Cr、Mn、Co、Ni、Cu、Zn、As、Cd、Hg 和 Pb 的背景值分别为 50.90、489.37、11.76、37.74、55.70、58.22、20.07、0.09、0.08 和 24.13 mg/kg。
