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Adsorption Capacity of X-TEX Filter Media
Compared to Other Oil Sorbent Media
X-TEX produced by the Xextex Corporation is a unique oil sorbent media that is used for filtering oil from water. X-TEX is made from recycled polymer fibers and is available in a textile blanket or as loose bulk fiber. The most prevalent oil adsorbent in use today is polypropylene, which is used in many different devices for the removal of hydrocarbons from water.
The objective of the study was to compare oil adsorption capacities of X-TEX and similar competing products. The following materials were used for comparison tests, as described below.
- X-TEX blanket media
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Xoil bilge filter with Clerify filter media
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3M Polypropylene Pads
- Heavy polypropylene geotextile material used for stormwater drain inserts
Method - The tests were performed using guidelines described in ASTM method F726-81, “Sorbent Performance of Adsorbents”. This test method measures the maximum adsorption of oils and floating immiscible liquids. Representative samples of above-mentioned materials were tested. Three different solutions were used: 50-wt motor oil, #2 diesel fuel, and a 50/50 solution of motor oil and diesel, and each material was tested 3 times with each solution.
X-TEX out adsorbed all of the competing products.
The results were averaged and are summarized in Tables 1 through 3. The 3M and X-TEX showed little difference in adsorbing the motor oil. Both X-TEX and 3M Pads outperformed the Xoil filter and the heavy propylene drain material by a wide margin. However, when results are averaged for material in all of the test parameters, X-TEX performed steadily adsorbing an average of 10.1 times its weight. The 3M pad averaged 8.9, heavy propylene filter media averaged 5.3 and the Xoil filter media averaged 3.9 times its weight.
Table 1. #2 Diesel Oil |
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Filter Media |
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Xoil Filter |
X-TEX |
3M Pad |
Heavy Propylene |
| Dry Wt. of Media (g) | 1.175 | 0.5674 | 0.873 | .3857 |
| Wet Wt. (oil saturated) | 5.453 | 6.4084 | 7.919 | 5.97 |
| Wt. of Oil (g) | 4.278 | 5.841 | 7.046 | 4.9843 |
| Adsorption | 3.64 | 10.29 | 8.07 | 5.06 |
Table 2. 50% Diesel/Motor oil Mixture |
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Filter Media |
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Xoil Filter |
X-TEX |
3M Pad |
Heavy Propylene |
| Dry Wt. of Media (g) | 1.1508 | 0.7448 | 0.9049 | 1.0635 |
| Wet Wt. (oil saturated) | 5.5925 | 7.666 | 8.5334 | 6.1893 |
| Wt. of Oil (g) | 4.4397 | 6.921 | 7.6285 | 5.1258 |
| Adsorption | 3.85 | 9.29 | 8.43 | 4.82 |
Table 3 Motor Oil |
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Filter Media |
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Xoil Filter |
X-TEX |
3M Pad |
Heavy Propylene |
| Dry Wt. of Media (g) | 0.9886 | 0.7128 | 0.7935 | 0.98045 |
| Wet Wt. (oil saturated) | 5.2013 | 8.3665 | 8.9828 | 6.80125 |
| Wt. of Oil (g) | 4.2128 | 7.6536 | 8.18925 | 5.8219 |
| Adsorption | 4.26 | 10.74 | 10.32 | 5.94 |
Figure 1 shows that X-TEX clearly out performed the other media. X-TEX adsorbed over twice as much as the Xoil filter and the heavy propylene materials. Note: The 3M pads cannot be used as a filter media even though their performance was close to X-TEX.
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Xextex Corporation, USA. Patented, and Patents Pending. |
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