Not All Zero Valent Iron Powders Are the Same

Since entering the environmental remediation market in 2000, Hepure’s ZVI reactive iron powders have become the most widely used micron-scale iron powders in the market, with documented successful outcomes at more than 150 sites across North America.

Hepure Zero Valent Iron Powders

Hepure’s reactive iron powder lines are produced from high quality cast iron feedstock and proprietary catalytic iron powders. The product line is available in several grades and mesh sizes for various applications. Using high quality feedstock, a proprietary grinding and pulverizing method creates reactive iron powders suitable for the most demanding of remediation environments.

From the selection of raw materials through manufacturing and packaging, all processes satisfy Hepure’s demanding product standards. Quality assurance testing is performed at every stage of production so that product consistency is assured.

Case studies Support

Figure 1

Detailed kinetics studies have revealed that not all iron powders are the same, and that Hepure’s Ferox iron powders have exceptional value. When these kinetic values are normalized to mass or surface area concentrations, Ferox Flow gave the most favorable results over for the degradation of chlorinated volatile organic compounds (cVOCs). Ferox Flow had more than twice the activity of leading competitor’s iron powders (Figure 1).

TCE Degradation First-Order Rate Constants for Various Iron Powders When Normalized to Surface Area

Figure 2

In a recent evaluation of ZVI iron powders performed in his laboratories, Dr. Paul Tratnyek noted that, “The rates of TCE degradation from the column experiments in this study are surprisingly consistent with previously published work.

“Ferox Flow gave the most favorable results of the ZVIs tested in this study.”

Dr. Paul G. Tratnyek is a Professor at Oregon Health & Science University and is a leading researcher on ZVI reactive iron powders.

TCE Degradation of First-Order Rate Constants Normalized to Mass Per Dollar

Comparison of Physical and Chemical Properties of Iron Powders

AnalysisHepure’s Ferox PRBLeading Competitor
Mesh Size: 20/6096%84%
Mesh Size: >604%16%
% Iron 95.48% 94.36%
% Sulfur 0.08% 0.56%
% Carbon 2.10% 2.13%
Density (g/cm3) 2.92 2.8
ColorGray Metallic Black Metallic
Oil Contents No oil smell, no oil visibility under microscope With oil smell, oil visible under microscope
Oil0% 1%
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