Polymer pendant crown thioethers for removal of mercury from acidic wastes

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Removal and immobilization of mercury ions from industrial waste streams is a difficult and expensive problem requiring an efficient and selective extractant that is resistant to corrosive conditions. We have now developed an acid-resistant thiacrown polymer that has potential utility as a selective and cost-effective Hg<sup>2+</sup> extractant. Copolymerization of a novel C-substituted thiacrown, N,N-(4-vinylbenzylmethyl)-2-aminomethyl- ,4,&l 1,14- pentathiacycloheptadecane, with DVB (80% divinylbenzene) using a radical initiator generated a highly cross-linked polymer containing pendant thiacrowns. Mercury extraction capabilities of the polymer were tested in acidic media (pH range: 1.5 to 6.2) and the extraction of Hg<sup>2+</sup> was determined to be 95<sup>+</sup>% with ... continued below

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Baumann, T F; Fox, G A & Reynolds, J December 22, 1998.

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Removal and immobilization of mercury ions from industrial waste streams is a difficult and expensive problem requiring an efficient and selective extractant that is resistant to corrosive conditions. We have now developed an acid-resistant thiacrown polymer that has potential utility as a selective and cost-effective Hg<sup>2+</sup> extractant. Copolymerization of a novel C-substituted thiacrown, N,N-(4-vinylbenzylmethyl)-2-aminomethyl- ,4,&l 1,14- pentathiacycloheptadecane, with DVB (80% divinylbenzene) using a radical initiator generated a highly cross-linked polymer containing pendant thiacrowns. Mercury extraction capabilities of the polymer were tested in acidic media (pH range: 1.5 to 6.2) and the extraction of Hg<sup>2+</sup> was determined to be 95<sup>+</sup>% with a mixing time of 30 minutes. The thiacrown polymer was also determined to be selective for Hg*+, competing ions such as Pb<sup>2+</sup>, Cd<sup>2+</sup>, A1<sup>3+</sup>, and Fe<sup>3+</sup>. even in the presence of high concentrations of The bound Hg<sup>2+</sup> ions can then be stripped from the polymer, allowing the polymer to be reused without significant loss of loading capacity.

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428 Kilobytes

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  • Waste Management '99 Conference, Tuson, AR, February 28-March 4, 1998

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  • Other: DE00007566
  • Report No.: UCRL-JC-132856
  • Grant Number: W-7405-Eng-48
  • Office of Scientific & Technical Information Report Number: 7566
  • Archival Resource Key: ark:/67531/metadc703863

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Office of Scientific & Technical Information Technical Reports

Reports, articles and other documents harvested from the Office of Scientific and Technical Information.

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  • December 22, 1998

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  • Sept. 12, 2015, 6:31 a.m.

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  • Feb. 24, 2016, 12:25 p.m.

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Baumann, T F; Fox, G A & Reynolds, J. Polymer pendant crown thioethers for removal of mercury from acidic wastes, article, December 22, 1998; Livermore, California. (digital.library.unt.edu/ark:/67531/metadc703863/: accessed June 20, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.