Electrode for selective bromide removal in membrane capacitive deionisation

Pema Dorji, Sherub Phuntsho, David Inhyuk Kim, Sungil Lim, Myoung Jun Park, Seungkwan Hong, Ho Kyong Shon

Research output: Contribution to journalArticlepeer-review

1 Citation (Scopus)

Abstract

Due to the shortage of freshwater around the world, seawater is becoming an important water source. However, seawater contains a high concentration of bromide that can form harmful disinfection by-products during water disinfection. Therefore, the current seawater reverse osmosis (SWRO) has to adopt two-pass reverse osmosis (RO) configuration for effective bromide removal, increasing the overall desalination cost. In this study, a bromide selective composite electrode was developed for membrane capacitive deionisation (MCDI). The composite electrode was developed by coating a mixture of bromide selective resin and anion exchange polymer on the surface of the commercial activated carbon electrode, and its performance was compared to that of conventional carbon electrode. The results demonstrated that the composite electrode has ten times better bromide selectivity than the conventional carbon electrode. The study shows the potential application of MCDI for the selective removal of target ions from water sources and the potential for resource recovery through basic modification of commercial electrode.

Original languageEnglish
Article number132169
JournalChemosphere
Volume287
DOIs
Publication statusPublished - 2022 Jan

Keywords

  • Bromide
  • Disinfection by-products
  • Electrode
  • Membrane capacitive deionisation
  • Selective

ASJC Scopus subject areas

  • Environmental Engineering
  • Chemistry(all)
  • Environmental Chemistry
  • Pollution
  • Public Health, Environmental and Occupational Health
  • Health, Toxicology and Mutagenesis

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