Characteristics and Restoration Measures for Heavy-Metal Polluted Soil-Crop Systems After Recultivation in Abandoned Lead and Zinc Mining Areas
Author:
Affiliation:

Clc Number:

X53

Fund Project:

  • Article
  • |
  • Figures
  • |
  • Metrics
  • |
  • Reference
  • |
  • Related
  • |
  • Cited by
  • |
  • Materials
  • |
  • Comments
    Abstract:

    [Objective] The soil-crop pollution characteristics and changes to the cultivated layer in a lead-zinc mining area of abandonment were analyzed, in order to explore the most reasonable phytoremediation system.[Methods] The distribution pattern and source of heavy-metal pollution in different areas of cultivated land were analyzed using the GIS-based Tominson load index method. The soil-crop pollution characteristics were studied by the enrichment factor method (BCF) and composite quality impact index method (IICQ).[Results] The contents of Cd, Zn, Pb, and Hg in the soil of the cultivated layer in the study area were 100, 45, 18, and 18 times of those of the background values of Guizhou Province, respectively. The levels of Cu, As, and Cr were basically the same as those of the background values. The planting areas of konjac were heavily polluted. The edible parts of stem-type crops had the strongest ability to enrich heavy metals, followed by rice, and the weakest melon crops. The local melon crops can be treated as the first plants to resist heavy metals.[Conclusion] Cd is the main control factor, and the konjac planting area is the main control area. According to the spatial distribution characteristics of heavy metals in the study area, it is recommended to use super-enriched plant restoration. Additional recommendations include the activators working together in heavily polluted areas, to plant anti-enrichment vegetables and block the pollution sources in the moderately polluted areas, and to use passivation measures to achieve the purpose of restoring the heavy metals in the tillage layer soil in the rice-growing areas of the light-polluted areas.

    Reference
    Related
    Cited by
Get Citation

沈乾杰,刘品桢,杜启露,刘晓媛,吴迪.废弃铅锌矿区复耕后土壤-作物重金属污染特征及修复措施[J].水土保持通报英文版,2019,39(5):223-230

Copy
Share
Article Metrics
  • Abstract:
  • PDF:
  • HTML:
  • Cited by:
History
  • Received:March 26,2019
  • Revised:May 06,2019
  • Adopted:
  • Online: November 16,2019
  • Published: