基于感应电磁法和高密度电阻率法探测的区域土壤物性参数与重金属含量之间的相关性 |
Study on the Correlation Between Regional Soil Physical Parameters and Heavy Metal Content Detected by Induction Electromagnetic Method and High-Density Resistivity Method |
投稿时间:2023-08-10 修订日期:2024-05-27 |
DOI:10.19316/j.issn.1002-6002.2024.06.21 |
中文关键词: 感应电磁法 高密度电阻率法 背景 污染场地 重金属 |
英文关键词:induction electromagnetic method high-density resistivity method background contaminated sites heavy metal |
基金项目:不同污染类型及污染程度土壤与物性参数的关联性研究(18DZ1204203) |
|
通讯作者:汤琳* 上海市环境监测中心, 上海 200232 |
摘要点击次数: 229 |
全文下载次数: 94 |
中文摘要: |
联合采用感应电磁法和高密度电阻率法对上海市4个代表性背景区域及7个典型污染场地土壤进行探测并分析重金属含量与物性参数间的相关性。研究结果表明:全市4个代表性背景区域土壤电导率集中分布在56.1~95.9 mS/m范围,浅层土壤(深度为1 m以内)电阻率集中分布在10.7~17.1 Ω· m范围。7个典型污染场地土壤电导率分布范围为33.45~517 mS/m,电阻率分布范围为1.70~17.0 Ω· m。与背景区域土壤相比,污染场地土壤电导率、电阻率分布更为分散;污染场地土壤电导率高值、中位值、平均值均显著高于背景区域土壤电导率,污染场地土壤电阻率低值、中位值、平均值均显著低于背景区域土壤电阻率。受到污染场地土壤重金属浓度影响,重金属污染场地土壤总体呈现高导、低阻现象。感应电磁法和高密度电阻率法均对土壤重金属含量有很好的响应能力。污染场地中土壤重金属含量显著影响土壤物性参数分布特征,但在污染场地地层结构、污染物种类的共同作用下,复杂性会增加。在该市的7个典型污染场地中,土壤电导率与重金属铬含量呈显著正相关,污染场地土壤电阻率与浅层土壤中砷含量呈显著负相关。除了重金属含量外,土层的不均一性、污染土层厚度的差异性、不同污染物引起土壤性状的改变等均有可能影响高密度电阻率法与感应电磁法的反演结果。 |
英文摘要: |
The induction electromagnetic method and high-density resistivity method were used to detect soils of four representative background sites and seven typical contaminated sites in Shanghai,and the correlation between heavy metal content and physical property parameters was studied. The results showed that the soil conductivity in four representative background sites was concentrated in the range of 56. 1-95. 9 mS / m,and the resistivity of shallow soil (within 1 m) was concentrated in the range of 10. 7-17. 1 Ω· m. The soil conductivity distribution range of seven typical contaminated sites was 33. 45-517 mS / m, and the resistivity distribution range was 1. 70-17. 0 Ω· m. Compared with the soil in the background sites, the soil conductivity and resistivity distribution of the contaminated sites were more scattered. The high,median and average values of soil conductivity in the contaminated site were significantly higher than those in the background sites,and the low,median and average values of soil resistivity in the contaminated sites were significantly lower than those in the background sites. Affected by the concentration of heavy metals,the soil of the heavy metal contaminated site generally showed high conductivity and low resistance. The induced electromagnetic method and high-density resistance method both had good response ability to soil heavy metal content,and the soil heavy metal content in the contaminated sites significantly affected the distribution characteristics of soil physical parameters,but the complexity increased with the combined action of the formation structure and pollutant type of the contaminated sites. Among the seven typical contaminated sites,soil conductivity was significantly positively correlated with heavy metal chromium content, and soil resistivity in contaminated sites was significantly negatively correlated with arsenic content in shallow (1 m) soil. In addition to the heavy metal content,the inversion results of the high-density resistance method and the induced electromagnetic method might be affected by the uneven consistency of the soil layer,the difference in the thickness of the contaminated soil layer, and the change of soil properties caused by different pollutants. |
查看全文 查看/发表评论 下载PDF阅读器 |
|
|
|