郓城县北部地区土壤元素地球化学背景值特征

Characteristics of Geochemical Background Value of Soil Elements in Northern Yuncheng County

摘要:

以郓城县北部地区表层土壤为研究对象,通过系统的地球化学调查,获取了土壤26项指标含量数据，计算了研究区土壤中元素背景值等地球化学参数。在此基础上与2003年山东省1∶25万多目标区域地球化学调查数据进行了对比，对区内重金属元素累积趋势进行了研究，并通过单时段增量模型对2035年土壤重金属元素含量做了预测。结果表明，与山东省土壤背景值平均值相比，研究区土壤中明显偏高的元素有：B、I、有机质、N、As、S、MgO、Cd、P、CaO；2003—2019年间，区内重金属元素Hg、Cr、Pb、Cd以增加为主，As元素有轻微减少的趋势，预测到2035年，研究区内Cd元素环境质量下降较明显，应引起足够的重视。

Abstract:

Taking the surface soil of Yuncheng county as the research object, the content data of 26 soil indexes have been obtained through a systematic geochemical survey. Geochemical parameters, such as the background values of elements in the soil have been calculated. On this basis, the accumulation trend of heavy metal elements in Shandong Province has been studied by comparing with geochemical survey data of more than 1∶ 250000 target areas in 2003. A study has been conducted on the accumulation trend of heavy metal elements in the area. A single period incremental model has been used to predict the content of heavy metal elements in soil in 2035. Comparing with the average background values of soil in Shandong province, the elements in the soil of the study area that are significantly higher are B, I, organic matter, N, As, S, MgO, Cd, P, CaO. From 2003 to 2019, the heavy metal elements, such as Hg, Cr, Pb and Cd in the study area are increasing, while As element is slightly decreasing . It is predicted that the environmental quality of Cd element in the study area will decrease significantly by 2035. It should be given sufficient attention.