SF Box--a tool for evaluating the effects on soil functions in remediation projects

Area of Science:

• Environmental Science
• Soil Science
• Ecotoxicology

Background:

• Remediation aims to reduce environmental risks but can impair soil ecological functions.
• Soil structure, organic matter, and nutrient levels are crucial for soil health and primary production.
• Assessing ecological functions in remediated soils is vital for sustainable land use.

Purpose of the Study:

• To present the Soil Function Box (SF Box) tool for integrating soil quality indicators (SQIs) into remediation management.
• To evaluate the ecological functions of remediated soils using the SF Box tool.
• To assess uncertainties in soil quality assessments using Monte Carlo simulations.

Main Methods:

• Development and application of the Soil Function Box (SF Box) tool.
• Integration of soil quality indicators (SQIs) into a soil quality index (1 of 5 classes).
• Application of the SF Box tool to two case studies (Kvillebäcken and Hexion) in Sweden, incorporating Monte Carlo simulations for uncertainty analysis.

Main Results:

• Both Kvillebäcken and Hexion sites achieved a medium soil performance (soil class 3) with high certainty.
• Key soil constraints identified were limited biological activity and insufficient plant-available nitrogen at both sites.
• Kvillebäcken showed limitations due to high coarse fragment content, while Hexion had low organic matter impacting stability and nutrient cycling.

Conclusions:

• The SF Box tool effectively integrates SQIs to assess remediated soil quality for ecological functions.
• Remediated soils at both sites exhibited medium performance, with biological limitations being a common concern.
• Site-specific factors like coarse fragments and organic matter content influence soil function and require tailored management strategies.