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Remediation of Dissolved Organic Pollutants in Water Using Organosilica-Based Materials that Rapidly and Reversibly Swell

Published online by Cambridge University Press:  31 January 2011

Paul L Edmiston  and
Laura A Underwood
Paul L Edmiston
Affiliation:
pedmiston@wooster.edu, College of Wooster, Chemistry, 943 College Mall, Wooster, Ohio, 44691, United States, 330-263-2113
Laura A Underwood
Affiliation:
lunderwood@wooster.edu, College of Wooster, Chemistry, Wooster, Ohio, United States
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Abstract

A sol-gel derived organosilica material that energetically swells when exposed to organic molecules was tested as a means to extract dissolved organic species from water. Swellable organically modified silica (SOMS) was demonstrated to be effective at removing butanol, methyl t-butyl ether (MTBE), tetrachloroethylene, trichloroethylene, ethanol, and toluene from lab grade water, salt water, and natural waters. Partition coefficients for the absorption of organic species from water by SOMS ranged from 2.8�105 – 1.0�102, and vary depending on polarity of the contaminant, concentration, and the total mass of contaminant absorbed. Absorption of organic species to SOMS appears to be enhanced by matrix expansion of nanometer sized pores leading to non-selective capture of organics beyond what could be attributed to physisorption.

Keywords

absorbentpurificationpolymer
Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 1169: Symposium Q – Materials Science of Water Purification , 2009 , 1169-Q06-17
Copyright
Copyright © Materials Research Society 2009

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