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'Frozen Smoke:' Ultimate Sponge For Cleaning Up Oil Spills

Date:
February 17, 2009
Source:
American Chemical Society
Summary:
Scientists in Arizona and New Jersey are reporting that aerogels, a super-lightweight solid sometimes called "frozen smoke," may serve as the ultimate sponge for capturing oil from wastewater and effectively soaking up environmental oil spills.

Aerogels, a super-lightweight solid sometimes called "frozen smoke," may capture oil from wastewater and soak up environmental oil spills.
Credit: NASA/JPL

Scientists in Arizona and New Jersey are reporting that aerogels, a super-lightweight solid sometimes called “frozen smoke,” may serve as the ultimate sponge for capturing oil from wastewater and effectively soaking up environmental oil spills.

In the new study, Robert Pfeffer and colleagues point out that the environmental challenges of oil contamination go beyond widely publicized maritime oil spills like the Exxon Valdez incident.

Experts estimate that each year people dump more than 200 million gallons of used oil into sewers, streams, and backyards, resulting in polluted wastewater that is difficult to treat. Although there are many different sorbent materials for removing used oil, such as activated carbon, they are often costly and inefficient. Hydrophobic silica aerogels are highly porous and absorbent material, and seemed like an excellent oil sponge.

The scientists packed a batch of tiny aerogel beads into a vertical column and exposed them to flowing water containing soybean oil to simulate the filtration process at a wastewater treatment plant. They showed that the aerogel beads absorbed up to 7 times their weight and removed oil from the wastewater at high efficiency, better than many conventional sorbent materials.


Story Source:

The above story is based on materials provided by American Chemical Society. Note: Materials may be edited for content and length.


Journal Reference:

  1. Quevedo et al. Removal of Oil from Water by Inverse Fluidization of Aerogels. Industrial & Engineering Chemistry Research, 2009; 48 (1): 191 DOI: 10.1021/ie800022e

Cite This Page:

American Chemical Society. "'Frozen Smoke:' Ultimate Sponge For Cleaning Up Oil Spills." ScienceDaily. ScienceDaily, 17 February 2009. <www.sciencedaily.com/releases/2009/02/090213102721.htm>.
American Chemical Society. (2009, February 17). 'Frozen Smoke:' Ultimate Sponge For Cleaning Up Oil Spills. ScienceDaily. Retrieved July 22, 2014 from www.sciencedaily.com/releases/2009/02/090213102721.htm
American Chemical Society. "'Frozen Smoke:' Ultimate Sponge For Cleaning Up Oil Spills." ScienceDaily. www.sciencedaily.com/releases/2009/02/090213102721.htm (accessed July 22, 2014).

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