Micron and nano ZVI with certified TCE/Cr(VI) reduction rates. PRB barriers, direct-push injection, regulatory documentation packages. Project-scale supply.
QUICK ANSWER
Zero-valent iron powder is high-purity metallic iron (Fe⁰ > 90%) in micron to submicron sizes used for environmental remediation — injected into contaminated groundwater and soil where it chemically reduces chlorinated solvents, immobilizes heavy metals (chromium, arsenic, uranium), and degrades pesticides and nitrates. It is the most widely used reductant in the global environmental remediation industry.
ZVI works by corrosion chemistry: as iron oxidizes in water, it donates electrons that break down contaminants — trichloroethylene dechlorinates to harmless ethene, carcinogenic hexavalent chromium reduces to benign trivalent chromium and precipitates, and a range of metals adsorb onto the iron oxide corrosion products. Remediation contractors inject ZVI slurries into permeable reactive barriers and direct-push injection points, buying powder on iron content, particle size (which sets reactivity and subsurface transport), and certified performance data that regulators require in project documentation.
MATERIAL DATA
Lot-level controls focus on the chemistry, particle characteristics, and process values that influence manufacturing consistency and finished-part performance.
| Element | Content | Performance Role |
|---|---|---|
| Metallic iron (Fe⁰) | > 90 wt% | The reactive reductant — drives all contaminant degradation chemistry |
| Particle size | 1-45 µm (injection grades) | Fine size = high reactivity + subsurface mobility |
| Surface area | 0.5-3 m²/g | Reaction rate driver — certified per lot |
| Carbon (C) | < 1.0 wt% | Residual limit for environmental purity |
| Heavy metals | Trace, certified | The product treats contamination — must not add any |
Final limits can be aligned with the agreed purchase specification.
APPLICATIONS
Groundwater remediation is the defining market: contaminated industrial sites — dry cleaners, chemical plants, military bases, electronics factories — are cleaned by injecting ZVI into the aquifer, where it treats chlorinated solvent plumes (TCE, PCE, DCE) for years as groundwater flows through the iron zone. Permeable reactive barriers trench granular ZVI across plume paths; direct-push injection places micron and nano ZVI precisely at source zones. Environmental contractors and their engineering consultants specify ZVI by reactivity certification, and every project files the powder's documentation with environmental regulators.
The second market is industrial water and soil treatment: mining drainage treatment, plating-shop wastewater polishing (Cr(VI) reduction), agricultural nitrate and pesticide treatment research, and ex-situ soil washing. Nano ZVI (nZVI) — with surface areas an order of magnitude higher — serves high-reactivity injection where rapid source-zone treatment justifies its premium, while granular ZVI fills long-life reactive barriers. Municipal and industrial wastewater plants add ZVI dosing for phosphorus and heavy metal control.
CHEMICAL & METALLURGICAL PROCESS POWDERS
CUSTOM SUPPLY
We supply micron ZVI (1-45 µm) and nano ZVI (50-300 nm) with certified metallic iron content, surface area, and contaminant-reduction rate data per lot, plus granular grades for reactive barriers. Stabilized nZVI suspensions for direct injection, project-scale packaging (drums to bulk bags), and full regulatory documentation packages are standard. Not export-controlled.
We supply micron ZVI (1-45 µm) and nano ZVI (50-300 nm) with certified metallic iron content, surface area, and contaminant-reduction rate data per lot, plus granular grades for reactive barriers.
Stabilized nZVI suspensions for direct injection, project-scale packaging (drums to bulk bags), and full regulatory documentation packages are standard.
MATERIAL COMPARISON
| Comparison Point | This Product | Nano ZVI |
|---|---|---|
| Particle size | 1-45 µm | 50-300 nm |
| Reactivity | High | 10-100x higher per gram |
| Subsurface transport | Moderate — injection near source | Better mobility in aquifer |
| Longevity | Years of treatment | Weeks-months — rapid source attack |
| Cost per kg | Low | 5-15x higher |
| Best use | PRB barriers, plume treatment | Source-zone hot spots |
TECHNICAL FAQ
Need a different chemistry, particle range, or processing route? Our material team can review the requirement and supply window.
Match the product to the treatment zone: nZVI for rapid source-zone reduction where high reactivity justifies cost; micron ZVI for plume barriers and long-duration treatment. Most projects use both — we support treatability testing with site groundwater before design.
Batch reactor test data showing contaminant reduction rates (typically TCE and Cr(VI)) under standardized conditions, plus full chemistry. Our lots ship with this documentation package as standard.
As a 5-30 percent slurry with biodegradable stabilizers through direct-push rigs or injection wells. We provide slurry preparation guidance and can supply pre-stabilized suspension grades for simplified field handling.
The iron corrodes gradually — that is the treatment mechanism. Properly designed barriers treat for 5-15 years before iron depletion; longevity modeling uses our certified iron content and surface area data.
No. Environmental remediation iron powders ship without licensing requirements.
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