Bromide and iodide selectivity in membrane capacitive deionisation, and its potential application to reduce the formation of disinfection by-products in water treatment

Pema Dorji, David Inhyuk Kim, Jiaxi Jiang, Jongmoon Choi, Sherub Phuntsho, Seungkwan Hong, Ho Kyong Shon

Research output: Contribution to journalArticle

1 Citation (Scopus)

Abstract

The formation of toxic disinfection by-products during water disinfection due to the presence of bromide and iodide is a major concern. Current treatment technologies such as membrane, adsorption and electrochemical processes have been known to have limitations such as high energy demand and excessive chemical use. In this study, the selectivity between bromide and iodide, and their removal in membrane capacitive deionisation (MCDI) was evaluated. The results showed that iodide was more selectively removed over bromide from several binary feed waters containing bromide and iodide under various initial concentrations and applied voltages. Even in the presence of significant background concentration of sodium chloride, definite selectivity of iodide over bromide was observed. The high partial-charge transfer coefficient of iodide compared to bromide could be a feasible explanation for high iodide selectivity since both bromide and iodide have similar ionic charge and hydrated radius. The result also shows that MCDI can be a potential alternative for the removal of bromide and iodide during water treatment.

Original languageEnglish
Pages (from-to)536-544
Number of pages9
JournalChemosphere
DOIs
Publication statusPublished - 2019 Nov 1

Fingerprint

Water Purification
Disinfection
iodide
Iodides
Bromides
Water treatment
bromide
disinfection
Byproducts
water treatment
membrane
Membranes
Sodium chloride
Charge transfer
Water
Adsorption
Electric potential
by-product
Poisons
sodium chloride

Keywords

  • Bromide
  • Disinfection by-products
  • Iodide
  • Membrane capacitive deionisation

ASJC Scopus subject areas

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

Cite this

Bromide and iodide selectivity in membrane capacitive deionisation, and its potential application to reduce the formation of disinfection by-products in water treatment. / Dorji, Pema; Kim, David Inhyuk; Jiang, Jiaxi; Choi, Jongmoon; Phuntsho, Sherub; Hong, Seungkwan; Shon, Ho Kyong.

In: Chemosphere, 01.11.2019, p. 536-544.

Research output: Contribution to journalArticle

@article{4dd0ebb4cd224332acb0128de5e4f2c1,
title = "Bromide and iodide selectivity in membrane capacitive deionisation, and its potential application to reduce the formation of disinfection by-products in water treatment",
abstract = "The formation of toxic disinfection by-products during water disinfection due to the presence of bromide and iodide is a major concern. Current treatment technologies such as membrane, adsorption and electrochemical processes have been known to have limitations such as high energy demand and excessive chemical use. In this study, the selectivity between bromide and iodide, and their removal in membrane capacitive deionisation (MCDI) was evaluated. The results showed that iodide was more selectively removed over bromide from several binary feed waters containing bromide and iodide under various initial concentrations and applied voltages. Even in the presence of significant background concentration of sodium chloride, definite selectivity of iodide over bromide was observed. The high partial-charge transfer coefficient of iodide compared to bromide could be a feasible explanation for high iodide selectivity since both bromide and iodide have similar ionic charge and hydrated radius. The result also shows that MCDI can be a potential alternative for the removal of bromide and iodide during water treatment.",
keywords = "Bromide, Disinfection by-products, Iodide, Membrane capacitive deionisation",
author = "Pema Dorji and Kim, {David Inhyuk} and Jiaxi Jiang and Jongmoon Choi and Sherub Phuntsho and Seungkwan Hong and Shon, {Ho Kyong}",
year = "2019",
month = "11",
day = "1",
doi = "10.1016/j.chemosphere.2019.05.266",
language = "English",
pages = "536--544",
journal = "Chemosphere",
issn = "0045-6535",
publisher = "Elsevier Limited",

}

TY - JOUR

T1 - Bromide and iodide selectivity in membrane capacitive deionisation, and its potential application to reduce the formation of disinfection by-products in water treatment

AU - Dorji, Pema

AU - Kim, David Inhyuk

AU - Jiang, Jiaxi

AU - Choi, Jongmoon

AU - Phuntsho, Sherub

AU - Hong, Seungkwan

AU - Shon, Ho Kyong

PY - 2019/11/1

Y1 - 2019/11/1

N2 - The formation of toxic disinfection by-products during water disinfection due to the presence of bromide and iodide is a major concern. Current treatment technologies such as membrane, adsorption and electrochemical processes have been known to have limitations such as high energy demand and excessive chemical use. In this study, the selectivity between bromide and iodide, and their removal in membrane capacitive deionisation (MCDI) was evaluated. The results showed that iodide was more selectively removed over bromide from several binary feed waters containing bromide and iodide under various initial concentrations and applied voltages. Even in the presence of significant background concentration of sodium chloride, definite selectivity of iodide over bromide was observed. The high partial-charge transfer coefficient of iodide compared to bromide could be a feasible explanation for high iodide selectivity since both bromide and iodide have similar ionic charge and hydrated radius. The result also shows that MCDI can be a potential alternative for the removal of bromide and iodide during water treatment.

AB - The formation of toxic disinfection by-products during water disinfection due to the presence of bromide and iodide is a major concern. Current treatment technologies such as membrane, adsorption and electrochemical processes have been known to have limitations such as high energy demand and excessive chemical use. In this study, the selectivity between bromide and iodide, and their removal in membrane capacitive deionisation (MCDI) was evaluated. The results showed that iodide was more selectively removed over bromide from several binary feed waters containing bromide and iodide under various initial concentrations and applied voltages. Even in the presence of significant background concentration of sodium chloride, definite selectivity of iodide over bromide was observed. The high partial-charge transfer coefficient of iodide compared to bromide could be a feasible explanation for high iodide selectivity since both bromide and iodide have similar ionic charge and hydrated radius. The result also shows that MCDI can be a potential alternative for the removal of bromide and iodide during water treatment.

KW - Bromide

KW - Disinfection by-products

KW - Iodide

KW - Membrane capacitive deionisation

UR - http://www.scopus.com/inward/record.url?scp=85067512616&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=85067512616&partnerID=8YFLogxK

U2 - 10.1016/j.chemosphere.2019.05.266

DO - 10.1016/j.chemosphere.2019.05.266

M3 - Article

C2 - 31229715

AN - SCOPUS:85067512616

SP - 536

EP - 544

JO - Chemosphere

JF - Chemosphere

SN - 0045-6535

ER -