Barrier properties of poly(vinyl alcohol) membranes containing carbon nanotubes or activated carbon

Erin M. Surdo, Iftheker A. Khan, Atif A. Choudhury, Navid B. Saleh, William A. Arnold

Research output: Contribution to journalArticle

10 Scopus citations

Abstract

Carbon nanotube addition has been shown to improve the mechanical properties of some polymers. Because of their unique adsorptive properties, carbon nanotubes may also improve the barrier performance of polymers used in contaminant containment. This study compares the barrier performance of poly(vinyl alcohol) (PVA) membranes containing single-walled carbon nanotubes (SWCNTs) to that for PVA containing powdered activated carbon (PAC). Raw and surface-functionalized versions of each sorbent were tested for their abilities to adsorb 1,2,4-trichlorobenzene and Cu2+, representing the important hydrophobic organic and heavy metal contaminant classes, as they diffused across the PVA. In both cases, PAC (for 1,2,4-trichlorobenzene) and functionalized PAC (for Cu2+) outperformed SWCNTs on a per mass basis by trapping more of the contaminants within the barrier membrane. Kinetics of sorption are important in evaluating barrier properties, and poor performance of SWCNT-containing membranes as 1,2,4-TCB barriers is attributed to kinetic limitations.

Original languageEnglish (US)
Pages (from-to)334-340
Number of pages7
JournalJournal of Hazardous Materials
Volume188
Issue number1-3
DOIs
StatePublished - Apr 15 2011

Keywords

  • Activated carbon
  • Barrier membrane
  • Carbon nanotubes
  • Diffusion
  • Landfill liner
  • Sediment cap
  • Sorption

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