Future research on nZVI is focused on addressing its limitations and expanding its applications. Key areas of interest include: 1. Surface Modification: Developing coatings or modifying the surface of nZVI particles to prevent agglomeration and enhance their stability. 2. Hybrid Materials: Combining nZVI with other materials, such as activated carbon or polymers, to improve its reactivity and longevity. 3. Field Studies: Conducting more field-scale studies to better understand the performance and environmental impact of nZVI in real-world conditions. 4. Regulatory Frameworks: Establishing guidelines and regulations to ensure the safe and effective use of nZVI in environmental applications.