Polypropylene products are the most widely used oil adsorbent products on the market today - not the best - just the most widely used!
This study compares the adsorptive qualities of Adsorb-it , 3M Polypropylene Pads, Heavy polypropylene geo-textile, as used for storm water filtration, and Xoil bilge filter with Clerify filter media. Results of this adsorption capacity comparison are presented in the tables below.
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| Method |
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ASTM Method F726-81, “Sorbent Performance of Adsorbents” measures the maximum adsorption of oils and floating immiscible liquids. Testing under these ASTM guidelines, representative samples of the media to be tested were treated with three different solutions of 50 weight motor oil, #2 diesel fuel, and a 50/50 solution of motor oil and diesel fuel. Each media was tested 3 times with each solution and the results of the 3 tests were averaged for each tested media to obtain an accurate representation of the adsorption capacity.
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Results |
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#2 Diesel Oil
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Adsorption
(times its weight)
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| .weight in grams |
Xoil Filter
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3M Pad
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Heavy Poly- propylene
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| Dry Weight of Media |
1.175
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0.5674
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0.873
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0.3857
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| Oil-Saturated Weight |
5.453
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6.4084
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7.919
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5.97
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| Weight of Oil |
4.278
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5.841
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7.046
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4.9843
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| Adsorbtion (times its weight) |
3.64
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10.29
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8.07
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5.06
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50/50 Diesel / Motor Oil
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Adsorption
(times its weight)
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| .weight in grams |
Xoil Filter
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3M Pad
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Heavy Poly- propylene
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| Dry Weight of Media |
1.1508
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0.7448
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0.9049
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1.0635
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| Oil-Saturated Weight |
5.5925
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7.666
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8.5334
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6.1893
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| Weight of Oil |
4.4397
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6.921
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7.6285
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5.1258
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| Adsorbtion (times its weight) |
3.85
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9.29
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8.43
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4.82
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Motor Oil
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Adsorption
(times its weight)
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| .weight in grams |
Xoil Filter
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3M Pad
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Heavy Poly- propylene
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| Dry Weight of Media |
0.9886
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0.7128
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0.7935
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0.98045
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| Oil-Saturated Weight |
5.2013
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8.3665
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8.9828
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6.80125
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| Weight of Oil |
4.2128
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7.6536
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8.18925
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5.8219
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| Adsorbtion (times its weight) |
4.26
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10.74
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10.32
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5.94
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| Conclusions
Test results clearly show that Adsorb-it out-performed the other filtration media with an adsorption factor in excess of 10 times the weight of the Adsorb-it geo-textile filtration fabric. 3M Polypropylene Pads ran second to the Adsorb-it. However, it should be noted that 3M Polypropylene Pads cannot be used as a filtration media because water will not readily pass through the polypropylene pad, nor can they be re-used as the Adsorb-it can be.
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