Soil Remediation

Environmentally Friendly Soil Remediation with Polyaspartic Acid (PASP) and IDS

Amid global challenges such as soil degradation, heavy metal contamination, and declining fertility, the development of environmentally friendly soil remediation materials has become a critical topic for sustainable agriculture. Polyaspartic acid (PASP) and tetrasodium iminodisuccinate (IDS), two novel green agents, demonstrate significant potential in soil remediation applications.

Product Characteristics and Advantages

Polyaspartic Acid (PASP)

• Molecular Structure: Polypeptide analog with abundant carboxyl functional groups

• Biodegradability: >90% degradation within 28 days

• Chelation Capacity: Strong chelation of multiple metal ions

• Environmental Safety: Non-toxic, eco-friendly

Tetrasodium Iminodisuccinate (IDS)

• Molecular Features: Organic compound containing multiple carboxyl and amino groups

• Biodegradability: >80% degradation within 28 days

• Chelation Capacity: Calcium chelation ≥280 mg/g

• Safety: LD50 >5000 mg/kg

Mechanisms of Soil Remediation

Heavy Metal Pollution Remediation
PASP and IDS form stable water-soluble complexes with heavy metal ions (e.g., Cd, Pb, Cu) through carboxyl and other functional groups, altering their bioavailability in soil. Studies show that combined use can reduce bioavailable cadmium by 40–60% and lead bioavailability by 35–50%.

Soil Structure Improvement
These materials improve soil structure by:

• Promoting soil aggregate formation and increasing porosity by 15–25%

• Enhancing water and nutrient retention

• Improving soil aeration and supporting root development

Nutrient Activation and Utilization

• Release immobilized nutrients such as phosphorus and potassium

• Increase fertilizer utilization efficiency by 25–35%

• Activate trace elements in soil, improving nutrient balance

Microbial Ecosystem Enhancement

• Stimulate the growth of beneficial microorganisms

• Increase soil enzyme activity

• Enhance soil biodiversity

Polyaspartic acid (PASP) and tetrasodium iminodisuccinate (IDS), as environmentally friendly soil remediation agents, demonstrate remarkable effectiveness in heavy metal remediation, soil structure improvement, and nutrient activation through their unique chelation and biostimulant functions. Their combined application not only improves remediation efficiency but also reduces environmental risks, providing a new technological support for sustainable agriculture. With continued research and technological advancement, PASP and IDS are expected to play an increasingly important role in soil remediation, contributing significantly to the development of a green agricultural system.