Establishment of Diffusion Characteristics Extraction Model of Heavy Metal Pollution in Agricultural Soil

Wen Huang, Yinfeng Xu

Ekoloji, 2019, Issue 108, Pages: 629-633

OPEN ACCESS

Download Full Text (PDF)

Abstract

The patterns of heavy metal pollution in agricultural soils in China are diverse, and the risk of regional pollution is prominent. Heavy metal pollution mainly includes strong spatial heterogeneity of heavy metals in soil, large differences in heavy metal accumulation between soil types and crop varieties, serious soil acidification, imbalance of soil elements, difficulty in reversing the trend of heavy metal accumulation in soil, insignificant linear relationship between soil and crop in heavy metal accumulation, imperfect remediation technology, and lack of long-term risk control mechanism of remediation measures. In order to further clarify the diffusion characteristics of heavy metal pollution in agricultural soils, based on a large number of spatial distance data and heavy metal content data, Kriging interpolation method is used to draw the spatial distribution map of heavy metal elements and establish a spatial distribution model. At the same time, the mathematical model of heavy metal pollution degree in agricultural soil surface is established. The pollution degree of agricultural soil is evaluated by Nemerow comprehensive index method and single pollution index method, and the main cause of heavy metal pollution is found to be industrial activities. Finally, the convection-dispersion-adsorption equation model of heavy metal pollutants in agricultural soils is established by analyzing the main characteristics of heavy metal pollutants in the process of transmission.

Keywords

agricultural soils, heavy metal pollution, Kriging interpolation method, Nemerow composite index method

References

  • Duan Q, Lee J, Liu Y (2016) Distribution of Heavy Metal Pollution in Surface Soil Samples in China: A Graphical Review. Bull Environ ContamToxicol 97:303-309.
  • Fatoba PO, Ogunkunle CO, Folarin OO (2016) Heavy metal pollution and ecological geochemistry of soil impacted by activities of oil industry in the Niger Delta, Nigeria. Environmental Earth Sciences 75:1-9.
  • Hu B, Chen S, Hu J (2017) Application of portable XRF and VNIR sensors for rapid assessment of soil heavy metal pollution. Plos One 12:17-38.
  • Kibria G, Hossain MM, Mallick D (2016) Trace/heavy metal pollution monitoring in estuary and coastal area of Bay of Bengal, Bangladesh and implicated impacts. Marine Pollution Bulletin 105:393-402.
  • Mana SCA, Hanafiah MM, Chowdhury AJK (2017) Environmental characteristics of clay and clay-based minerals. Geology, Ecology, and Landscapes 1 (3):155-161.
  • Marrugonegrete J, Pinedohernández J, Díez S (2017) Assessment of heavy metal pollution, spatial distribution and origin in agricultural soils along the Sinú River Basin, Colombia. Environmental Research 154:380-388.
  • Tiwari AK, Singh PK, Singh AK (2016) Estimation of Heavy Metal Contamination in Groundwater and Development of a Heavy Metal Pollution Index by Using GIS Technique. Bulletin of Environmental Contamination & Toxicology 96:1-8.
  • Yin Q, Wang R, Zhao Z (2018) Application of Mg-Al-modified biochar for simultaneous removal of ammonium, nitrate, and phosphate from eutrophic water. Journal of Cleaner Production 176:230-240.