Scientists are reporting that unprocessed, raw cotton may be an ideal, ecologically friendly answer, with an amazing ability to sop up oil.
WASHINGTON DC, US: With the Deepwater Horizon disaster emphasizing the need for better ways of cleaning up oil spills, scientists are reporting that unprocessed, raw cotton may be an ideal, ecologically friendly answer, with an amazing ability to sop up oil. Their report, which includes some of the first scientific data on unprocessed, raw cotton’s use in crude oil spills, appears in the ACS journal Industrial & Engineering Chemistry Research.
Researcher Seshadri Ramkumar and colleagues noted that a particular need exists for oil-spill sorbents that are abundantly available at relatively low cost, sustainable and biodegradable. There have been extensive studies on fibres such as barley straw, kapok and wool - but big gaps in knowledge about their basic crude oil-uptake mechanisms and no data on unprocessed raw cotton. Ramkumar’s team decided to fill those gaps with research on the oil sorption properties of low micronaire cotton, a form of unprocessed cotton with relatively less commercial value.
They reported that each pound of the material has the ability to sop up and hold more than 30 pounds of crude oil. The cotton fibres take up oil in multiple ways, including both absorption and adsorption (in which oil sticks to the outer surface of the cotton fibre). “In contrast to synthetic sorbents, raw cotton with its high crude oil sorption capacity and positive environmental footprint make it an ecologically friendly sorbent for oil spill cleanups,” the report concluded.
© American Chemical Society News
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