Dissolution and transport of coal tar compounds in fractured clay-rich residuum

Publication: Research - peer-reviewJournal article – Annual report year: 2012

  • Author: Vulava, Vijay M.

    College of Charleston, Department of Geology and Environmental Geosciences, United States

  • Author: McKay, Larry D.

    University of Tennessee, Department of Earth and Planetary Sciences, United States

  • Author: Broholm, Mette Martina

    Water Resources Engineering, Department of Environmental Engineering, Technical University of Denmark, Denmark

  • Author: McCarthy, John F.

    University of Tennessee, Center for Environmental Biotechnology, United States

  • Author: Driese, Steven G.

    Department of Geology, One Bear Place #97354, Baylor University, United States

  • Author: Sayler, Gary S.

    University of Tennessee, Center for Environmental Biotechnology, United States

View graph of relations

We investigated the dissolution and transport of organic contaminants from a crude coal tar mixture in a monolith of fractured clay-rich residuum. An electrolyte solution was eluted through the residuum monolith containing a small emplaced source of coal tar under biologically inhibited and mildly acidic conditions. Concentrations of 10 coal tar compounds, representing mono-, poly-, and heterocyclic aromatic hydrocarbons that constitute crude coal tar were monitored in the effluent over a period of 377 days. Most compounds appeared in the effluent within the first 0.1 pore volume eluted indicating the importance of rapid dissolution and transport through the fracture networks. The concentrations continued to rise but did not reach the corresponding effective solubility limit in most cases. Compounds that were less soluble and those that were more susceptible to sorption or matrix diffusion eluted at a much slower rate. Analysis of contaminant concentrations in microcore residuum samples indicated that all 10 compounds had spread throughout the entire monolith and had diffused into the fine-grained matrix between fractures. These data suggest that the predominantly fine pore structure did not appear to inhibit coal tar dissolution and subsequent transport, even though only a small portion of tar was in direct contact with fractures and macropores that control most flow. (C) 2011 Elsevier B.V. All rights reserved.
Original languageEnglish
JournalJournal of Hazardous Materials
Publication date2012
Volume203-204
Pages283-289
ISSN0304-3894
DOIs
StatePublished
CitationsWeb of Science® Times Cited: 0

Keywords

  • fractured clay-rich residuum, coal tar compound pollutant, soil pollutant, water pollutant transport, dissolution, DNAPL, electrolyte solution, heterocyclic aromatic hydrocarbon pollutant, soil pollutant, water pollutant transport, dissolution, monoaromatic hydrocarbon pollutant, soil pollutant, water pollutant transport, dissolution, polyaromatic hydrocarbon pollutant, soil pollutant, water pollutant transport, dissolution, 37015, Public health - Air, water and soil pollution, Pollution Assessment Control and Management
Download as:
Download as PDF
Select render style:
APAAuthorCBEHarvardMLAStandardVancouverShortLong
PDF
Download as HTML
Select render style:
APAAuthorCBEHarvardMLAStandardVancouverShortLong
HTML
Download as Word
Select render style:
APAAuthorCBEHarvardMLAStandardVancouverShortLong
Word

ID: 43534954