ReSoil® Technology

A novel and innovative remediation solution that enables the removal of heavy metals from contaminated soils in a closed cycle through an emission-free process without wastewater, while preserving the soil as a natural substrate.

How It Works

The ReSoil® process combines innovative soil washing techniques with advanced recycling solutions to effectively remove heavy metals while preserving soil quality.

Key Process Features

In ReSoil® the chelating agent EDTA (ethylenediamine tetraacetate) is used to extract toxic metals: Pb, Cd, Cu, Zn…. and metalloids: As, Sb from the soil.

ReSoil® is a batch process with a soil remediation cycle of < 1.5 hours.

EDTA and all process water are recycled in a pH gradient of 12.5 - 2 given by CaO / Fe2+ and H2SO4.

Metals and metalloids precipitate with Fe and in the form of hydroxides.

Excess and residual reagents are removed from the process solutions, e.g. as Ca salts.

Water is only required to balance the moisture in the remediated soil and for lime hydration.

The washed soil is used as a filter to purify the process solutions.

Emissions from the washed soil are contained by rinsing the soil and adding zero-valent iron (Fe0) to the soil slurry.

Closed cycle: No waste water is produced, only solid waste.

Sustainable Soil Restoration

ReSoil® enables the restoration of soils across various land uses, including agricultural lands, paddy fields, brownfields, military sites, and urban areas.

Key Benefits

✓Preserves soil's chemical, physical, and biological properties
✓Reduces heavy metal concentrations by up to 99%
✓Ensures unaffected plant growth

Cost Analysis

ReSoil® follows the principle of economies of scale, offering cost-effective solutions through efficient material recycling and innovative processes.

Cost Analysis by Plant Capacity

Investment + operation

Remediation

Materials + energy

Remediation Options Comparison

See how ReSoil® compares to conventional remediation methods for soils contaminated with heavy metals.

Available Technologies	In use by	Effective for heavy metal removal	Applicable for highly contaminated soil	Applicable for all soil types	Applicable for multi-contaminated soil	Preserves soil (Green & sustainable)	NO problematic emissions	Cost for end customer (€/m³)
Soil dig & dump	Construction companies	YES	YES	YES	YES	NO	Soil deposition	100 – 700
Engineered solutions (soil capping)	Construction companies	YES	YES	YES	YES	NO	Leaching	30 – 200
Solidification & Stabilization	Construction companies	NO	YES	NO	YES	NO	YES but difficult to achieve	40 – 100
Classical soil washing (removal of fines)	Remediation companies	YES (up to 80%)	YES, optionally	Only for light and sandy soils	YES	NO	Deposition of contaminated fines	50 – 150
Immobilization by various additives	Remediation companies	NO (reduces Bio-metal accessibility)	NO	Difficult for rich, heavy soils	Theoretically	YES	YES	20 – 60 + repeatable periodical cost
Phytoremediation	Remediation companies	Not efficient for Pb, As, Cu.	NO	YES	NO	YES	Contaminated biomass	?
ReSoil®	Remediation companies	YES (up to 95 %)	YES	YES	YES	YES	YES	70 – 150

Why Choose ReSoil®?

ReSoil® offers a more sustainable and efficient alternative to conventional remediation methods, being the only solution that efficiently removes toxic metals while preserving soil functionality.