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A soil quality index for reclaimed mine soils
Verónica Asensio1, S D Guala, Flora A Vega
1Universidade de Vigo, Bioloxía Vexetal e Ciencia do Solo, Facultade de Bioloxía, Pontevedra, Spain. verosaf@uvigo.es
Environmental Toxicology and Chemistry
|June 22, 2013
Summary
Developing soil quality indexes (SQIs) is crucial for assessing reclaimed mine soils. Amending soils with wastes like sewage sludge significantly improves quality, offering a viable reclamation strategy.
Area of Science:
- Environmental Science
- Soil Science
- Ecology
Background:
- Mine soils often suffer from low quality due to metal contamination.
- Effective reclamation strategies are needed to restore soil health.
- Existing methods lack quantitative tools to evaluate reclaimed mine soil quality.
Purpose of the Study:
- To propose a novel method for developing soil quality indexes (SQIs).
- To create SQIs for reclaimed mine soils (settling pond, mine tailing).
- To assess the efficacy of reclamation treatments including vegetation and waste amendment.
Main Methods:
- Factor analysis was employed to select key variables for SQI development.
- Soil quality indexes were calculated for different reclamation scenarios.
- Field assessments were conducted to evaluate soil quality under real-world conditions.
Main Results:
- The developed SQI method proved effective for evaluating reclaimed mine soils.
- Untreated mine soils exhibited very low quality.
- Amending soils with wastes (sewage sludge, paper mill residues) yielded the most significant quality improvement.
Conclusions:
- The proposed SQI method is a valid tool for assessing reclaimed mine soil quality.
- Waste amendment, particularly with sewage sludge and paper mill residues, is a highly effective reclamation technique.
- Periodic application of these amendments is recommended for sustained soil quality improvement, though effects may diminish over time.
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