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Jerry M. Brownstein
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  Metals Test

Removal of Metals with X-TEX-Z-200

Introduction - The following tests were conducted to determine the efficiency of removal of targeted metals from water after passing through various layers of the X-TEX-Z-200 textile. Several layers were assembled to determine how much retention time is needed to conclude the ion exchange with the preferred zeolite.
The metals selected were zinc, lead, and copper, commonly found in storm water run-off. Two tests were conducted; one, to determine the efficiency of metal removal by X-TEX-Z-200 without any oil interference and, two, to determine if the introduction of oil in the test solution caused any effect on the removal of metals using X-TEX-Z-200.

Method - Two test solutions were created. Both solutions had approximately 10ppm of zinc, copper, and lead. The second solution had an additional 1000ppm of oil added.

Four layers of the X-TEX-Z-200 were cut out and placed one at a time inside a funnel. After each layer was placed in the funnel one liter of the test solution was poured through the X-TEX-Z-200. Water free flowed through the fabric with little resistance. The solution flowed without restriction consecutively through the 4 combined layers of X-TEX-Z-200.

The table below summarizes the results of this test. The sample layer named “RAW” was the actual concentrations of metals in the test solution.

*Mg/l
**L = Layers of X-TEX-Z-200

The percent removal for each layer is summarized below:

Results - The results from these tests conclude that X-TEX-Z-200 can substantially remove soluble metals from storm water run-off even when oil is present. The data suggest that only two layers with a free flow through the material can remove from 50 to 90 percent of some metals and over 90 percent removal for all metals after flowing through 4 layers. This remarkable material will help bring users into compliance with their storm water regulations. Variation of X-TEX-Z-200 will be tested in the near future to improve the efficiency for removal of metals and nutrients. The graph below also illustrates the efficiency of X-TEX-Z-200 for removal of metals in water.