The H-200 ZVI powder used in the Ferox^SM process is a proprietary high reactive zero valent iron powder exclusively available through ARS. Directly reduced from iron ore and manufactured in the USA, this material contains no toxic levels of trace elements as may be found in cast iron or waste iron stocks from which conventional iron filings originate. The H-200 is codex “food-grade” certifiable due to its high purity and the manner in which it is produced. Internal porosities on the individual iron particles, along with other inclusions found within its structural matrix (not as a separate phase), result in greater reactivity than other powders of similar or smaller particle size on the market.

Several recently conducted studies further confirmed the enhanced treatment benefits of the H-200 powder. One study performed at Clemson University looked at the adsorption effect of a chlorinated solvent (TCE was used) onto different
iron particles that may be miss-interpreted as actual reduction. The apparent decrease in the TCE concentrations in the presence of H-200 was mostly attributed to actual chemical breakdown of the compound and least caused by adsorption.
The other commercial iron types from Connelly, Peerless, and Fisher exhibited higher absorption of the TCE.

ARS also recently completed an bench-top test to compare the reactivity of several different ZVI powders. They include the H-200 sponge iron, cast iron, and other proprietary ZVI powders of very fine particle sizes. The study was conducted
using both sediments and actual groundwater contaminated with TCE. The H-200 showed the most significant reduction. The following graph shows the reduction of TCE mass by the different iron powders:

ARS also observed during this test the use of H-200 generated little or no daughter products such as cis-1,2-DCE and vinyl chloride compared to the other irons. This confirms the field data from several of our project sites in which the TCE was
degraded preferentially by the beta-elimination process without creating the daughter products rather than by sequential dechlorination.

The test also showed that the reactivity of a iron powder is not dictated by particle size or surface area. As part of product R&D, ARS had previously tested other types of very fine powder that showed lower reactivities.

ARS believes the H-200 ZVI powder is the best, most cost effective and environmentally friendly ZVI powder on the market today. Visit www.zerovalentiron.com for more product information.