Enrichment of 1, 4-dioxane from water by sweep gas membrane distillation on nano-carbon immobilized membranes

Mitun Chandra Bhoumick, Sagar Roy, Somenath Mitra

Research output: Contribution to journalArticlepeer-review

Abstract

In this paper, we report the enrichment of 1,4-dioxane from aqueous solution by low temperature sweep gas membrane distillation (SGMD) on nanocarbon immobilized membranes. Carbon nanotube (CNT), reduced graphene oxide (rGO) and their derivatives were immobilized over commercial polytetrafluoroethylene (PTFE) membrane, and their separation performances were investigated. The surface modification resulted in higher 1,4-dioxane flux and enhanced enrichment factor. The SGMD operation showed excellent separation at lower temperatures due to relatively higher vapor pressure of 1, 4-dioxane compared to water. Among the various membranes, CNT immobilized membrane (CNIM) showed the best performance followed by rGO immobilized membrane (rGOIM) and carboxylated functionalized carbon nanotube membranes (CNIM-f). At 60 °C the CNIM membrane showed 50% increase in enrichment factor and 25% increase in 1,4-dioxane flux compared to the control PTFE membrane. The performance enhancement can be attributed to the faster and preferential sorption–desorption over the nanocarbon surfaces.

Original languageEnglish (US)
Article number119360
JournalSeparation and Purification Technology
Volume276
DOIs
StatePublished - Dec 1 2021

All Science Journal Classification (ASJC) codes

  • Analytical Chemistry
  • Filtration and Separation

Keywords

  • Carbon nanotubes
  • Enrichment factor
  • Hydrophobic membrane
  • Reduced graphene oxide
  • Sweeping gas membrane distillation

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