An Integrated System for the Treatment of Coal Conversion Wastewater

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Description

Treatment of mixed waste from coal conversion wastewaters involves the degradation of toxic organics and the removal of heavy metals. An integrated and cost-effective treatment scheme that can implement such a process is considered essential to promote continued development and growth of coal conversion processes without any deleterious effects on our ecosystem. We have recently developed a pH-dependent, reversible heavy metal adsorption/desorption process which promises to be a cost-effective alternative to the treatment and disposal options currently in place for these inorganic contaminants. Our work shows that: (1) Polydisperse, industrial-grade surfactants can be used in the development of novel, surfactant-coated ... continued below

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17 p.

Creation Information

Wang, Henry Y. & Srinivasan, Keeran R. February 25, 1999.

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This report is part of the collection entitled: Office of Scientific & Technical Information Technical Reports and was provided by UNT Libraries Government Documents Department to Digital Library, a digital repository hosted by the UNT Libraries. More information about this report can be viewed below.

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Description

Treatment of mixed waste from coal conversion wastewaters involves the degradation of toxic organics and the removal of heavy metals. An integrated and cost-effective treatment scheme that can implement such a process is considered essential to promote continued development and growth of coal conversion processes without any deleterious effects on our ecosystem. We have recently developed a pH-dependent, reversible heavy metal adsorption/desorption process which promises to be a cost-effective alternative to the treatment and disposal options currently in place for these inorganic contaminants. Our work shows that: (1) Polydisperse, industrial-grade surfactants can be used in the development of novel, surfactant-coated smectitic clays containing up to 50% by weight of adsorbed surfactant, (2) Reversible adsorption and resorption of cationic (CU(II) and Cd(II)) and anionic (Cr(VI)) heavy metals from their respective aqueous solutions onto these surfactant-modified smectites can be effected using pH of the medium as a switch, and (3) These surfactant-modified smectites can be repeatedly used (up to 5 times) with only a minimal loss in their adsorption potency and with very little leaching of the adsorbed surfactants.

Physical Description

17 p.

Notes

OSTI as DE00003817

Medium: P; Size: 17 pages

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  • Other Information: PBD: 25 Feb 1999

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  • Report No.: DE--FG22-91PC91295--47
  • Grant Number: FG22-91PC91295
  • DOI: 10.2172/3817 | External Link
  • Office of Scientific & Technical Information Report Number: 3817
  • Archival Resource Key: ark:/67531/metadc685406

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  • February 25, 1999

Added to The UNT Digital Library

  • July 25, 2015, 2:20 a.m.

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  • April 7, 2017, 3:35 p.m.

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Wang, Henry Y. & Srinivasan, Keeran R. An Integrated System for the Treatment of Coal Conversion Wastewater, report, February 25, 1999; Morgantown, West Virginia. (digital.library.unt.edu/ark:/67531/metadc685406/: accessed September 19, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.