Removal of Radium from Synthetic Shale Gas Brines by Ion Exchange Resin

Yuqiang Bi, Hui Zhang, Brian R. Ellis, Kim F. Hayes

Research output: Contribution to journalArticle

6 Citations (Scopus)

Abstract

Rapid development of hydraulic fracturing for natural gas production from shale reservoirs presents a significant challenge related to the management of the high-salinity wastewaters that return to the surface. In addition to high total dissolved solids (TDS), shale gas-produced brines typically contain elevated concentrations of radium (Ra), which must be treated properly to prevent contamination of surface waters and allow for safe disposal or reuse of produced water. Treatment strategies that isolate radium in the lowest volume waste streams would be desirable to reduce disposal cost and generate useful treatment by-products. The present study evaluates the potential of a commercial strong acid cation exchange resin for removing Ra2+ from high-TDS brines using fixed-bed column reactors. Column reactors were operated with varying brine chemistries and salinities in an effort to find optimal conditions for Ra2+ removal through ion exchange. To overcome competing divalent cations present in the brine for exchange sites, the chelating agent, EDTA, was used to form stable complexes predominantly with the higher concentration Ca2+, Mg2+, and Sr2+ divalent cations, while isolating the much lower concentration Ra2+ species. Results showed that Ra2+ removal by the resin strongly depended on the TDS concentration and could be improved with careful selection of EDTA concentration. This strategy of metal chelation coupled with ion exchange resins may be effective in enhancing Ra2+ removal and reducing the generation and disposal cost if volume reduction of low-level radioactive solid waste can be achieved.

Original languageEnglish (US)
Pages (from-to)791-798
Number of pages8
JournalEnvironmental Engineering Science
Volume33
Issue number10
DOIs
StatePublished - Oct 1 2016
Externally publishedYes

Fingerprint

Ion Exchange Resins
Radium
Brines
Ion exchange resins
radium
Waste disposal
resin
ion exchange
Ion exchange
Positive ions
Ethylenediaminetetraacetic acid
Divalent Cations
Chelation
EDTA
Edetic Acid
brine
Resins
cation
Cation Exchange Resins
salinity

Keywords

  • chelating agent
  • high salinity
  • ion exchange
  • radium
  • shale-gas wastewater

ASJC Scopus subject areas

  • Environmental Chemistry
  • Waste Management and Disposal
  • Pollution

Cite this

Removal of Radium from Synthetic Shale Gas Brines by Ion Exchange Resin. / Bi, Yuqiang; Zhang, Hui; Ellis, Brian R.; Hayes, Kim F.

In: Environmental Engineering Science, Vol. 33, No. 10, 01.10.2016, p. 791-798.

Research output: Contribution to journalArticle

Bi, Yuqiang ; Zhang, Hui ; Ellis, Brian R. ; Hayes, Kim F. / Removal of Radium from Synthetic Shale Gas Brines by Ion Exchange Resin. In: Environmental Engineering Science. 2016 ; Vol. 33, No. 10. pp. 791-798.
@article{aec5675f72e94226ae2ecf41bf4d05af,
title = "Removal of Radium from Synthetic Shale Gas Brines by Ion Exchange Resin",
abstract = "Rapid development of hydraulic fracturing for natural gas production from shale reservoirs presents a significant challenge related to the management of the high-salinity wastewaters that return to the surface. In addition to high total dissolved solids (TDS), shale gas-produced brines typically contain elevated concentrations of radium (Ra), which must be treated properly to prevent contamination of surface waters and allow for safe disposal or reuse of produced water. Treatment strategies that isolate radium in the lowest volume waste streams would be desirable to reduce disposal cost and generate useful treatment by-products. The present study evaluates the potential of a commercial strong acid cation exchange resin for removing Ra2+ from high-TDS brines using fixed-bed column reactors. Column reactors were operated with varying brine chemistries and salinities in an effort to find optimal conditions for Ra2+ removal through ion exchange. To overcome competing divalent cations present in the brine for exchange sites, the chelating agent, EDTA, was used to form stable complexes predominantly with the higher concentration Ca2+, Mg2+, and Sr2+ divalent cations, while isolating the much lower concentration Ra2+ species. Results showed that Ra2+ removal by the resin strongly depended on the TDS concentration and could be improved with careful selection of EDTA concentration. This strategy of metal chelation coupled with ion exchange resins may be effective in enhancing Ra2+ removal and reducing the generation and disposal cost if volume reduction of low-level radioactive solid waste can be achieved.",
keywords = "chelating agent, high salinity, ion exchange, radium, shale-gas wastewater",
author = "Yuqiang Bi and Hui Zhang and Ellis, {Brian R.} and Hayes, {Kim F.}",
year = "2016",
month = "10",
day = "1",
doi = "10.1089/ees.2016.0002",
language = "English (US)",
volume = "33",
pages = "791--798",
journal = "Environmental Engineering Science",
issn = "1092-8758",
publisher = "Mary Ann Liebert Inc.",
number = "10",

}

TY - JOUR

T1 - Removal of Radium from Synthetic Shale Gas Brines by Ion Exchange Resin

AU - Bi, Yuqiang

AU - Zhang, Hui

AU - Ellis, Brian R.

AU - Hayes, Kim F.

PY - 2016/10/1

Y1 - 2016/10/1

N2 - Rapid development of hydraulic fracturing for natural gas production from shale reservoirs presents a significant challenge related to the management of the high-salinity wastewaters that return to the surface. In addition to high total dissolved solids (TDS), shale gas-produced brines typically contain elevated concentrations of radium (Ra), which must be treated properly to prevent contamination of surface waters and allow for safe disposal or reuse of produced water. Treatment strategies that isolate radium in the lowest volume waste streams would be desirable to reduce disposal cost and generate useful treatment by-products. The present study evaluates the potential of a commercial strong acid cation exchange resin for removing Ra2+ from high-TDS brines using fixed-bed column reactors. Column reactors were operated with varying brine chemistries and salinities in an effort to find optimal conditions for Ra2+ removal through ion exchange. To overcome competing divalent cations present in the brine for exchange sites, the chelating agent, EDTA, was used to form stable complexes predominantly with the higher concentration Ca2+, Mg2+, and Sr2+ divalent cations, while isolating the much lower concentration Ra2+ species. Results showed that Ra2+ removal by the resin strongly depended on the TDS concentration and could be improved with careful selection of EDTA concentration. This strategy of metal chelation coupled with ion exchange resins may be effective in enhancing Ra2+ removal and reducing the generation and disposal cost if volume reduction of low-level radioactive solid waste can be achieved.

AB - Rapid development of hydraulic fracturing for natural gas production from shale reservoirs presents a significant challenge related to the management of the high-salinity wastewaters that return to the surface. In addition to high total dissolved solids (TDS), shale gas-produced brines typically contain elevated concentrations of radium (Ra), which must be treated properly to prevent contamination of surface waters and allow for safe disposal or reuse of produced water. Treatment strategies that isolate radium in the lowest volume waste streams would be desirable to reduce disposal cost and generate useful treatment by-products. The present study evaluates the potential of a commercial strong acid cation exchange resin for removing Ra2+ from high-TDS brines using fixed-bed column reactors. Column reactors were operated with varying brine chemistries and salinities in an effort to find optimal conditions for Ra2+ removal through ion exchange. To overcome competing divalent cations present in the brine for exchange sites, the chelating agent, EDTA, was used to form stable complexes predominantly with the higher concentration Ca2+, Mg2+, and Sr2+ divalent cations, while isolating the much lower concentration Ra2+ species. Results showed that Ra2+ removal by the resin strongly depended on the TDS concentration and could be improved with careful selection of EDTA concentration. This strategy of metal chelation coupled with ion exchange resins may be effective in enhancing Ra2+ removal and reducing the generation and disposal cost if volume reduction of low-level radioactive solid waste can be achieved.

KW - chelating agent

KW - high salinity

KW - ion exchange

KW - radium

KW - shale-gas wastewater

UR - http://www.scopus.com/inward/record.url?scp=84992371829&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=84992371829&partnerID=8YFLogxK

U2 - 10.1089/ees.2016.0002

DO - 10.1089/ees.2016.0002

M3 - Article

AN - SCOPUS:84992371829

VL - 33

SP - 791

EP - 798

JO - Environmental Engineering Science

JF - Environmental Engineering Science

SN - 1092-8758

IS - 10

ER -