Ion Exchange Resin Removes Arsenic, Helps Facilities Meet EPA Guidelines

June 21, 2006

Municipal, industrial, point-of-entry and groundwater facility managers responsible for meeting the new U.S. EPA guidelines limiting the amount of arsenic in drinking water to 10 ppb arsenic, can now take advantage of an arsenic absorption medium called ArsenX. Marketed by Purolite Co., ArsenX is an ion exchange resin (IER) impregnated with nano-sized particles of iron, enabling it to be selective for trivalent and pentavalent arsenic with a capacity of 50,000 BVs. AresenX also removes chromium, vanadium, uranium, selenium and many other oxy-ions.

Unlike GFO and GFH media, ArsenX can often be regenerated and/or disposed, thereby reducing arsenic disposal and discharge issues. In many cases, it can also simultaneously remove other critical elements such as uranium. The physical characteristics of arsenX are similar to those of traditional IER and therefore provide high volume throughputs. This capability translates to a smaller footprint, lower pressure drops and the practical elimination for the need to backwash.

The ArsenX bead resists attrition and thereby provides longer service life. NSF approved, the product can be retrofitted into existing GFO and GFH systems for increased capacity and throughputs.

Purolite has developed a proprietary computer installation program that closely models the performance of ArsenX in the actual application. The program analyzes feed-flow rate requirements under actual conditions and evauates the suitablitity and economics of ArsenX in any installation, thereby reducing or eliminating the need for a pilot plant.

“Working closely with equipment suppliers, engineering companies and end-users allows us to customize each installation using computer simulation modeling,” said Gary Thundercliffe, Purolite marketing director. “We guarantee capacity and can institute a pilot program, if needed.”

Source: Purolite