Removal of multiple drinking water contaminants by combined ion exchange resin in a completely mixed flow reactor

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1 Citation (Scopus)

Abstract

This research evaluated the combined ion exchange (CIX) process to give drinking water treatment plants a new option for multiple contaminants removal. The CIX process uses anion exchange resin and cation exchange resin in a single vessel, which enables simultaneous removal of anionic and cationic contaminants. The novel aspect of the CIX process investigated in this research was its application in a small pilot, completely mixed flow reactor (CMFR) with resin recycle and resin regeneration thereby providing realistic performance data. A wide range of contaminants was tested for removal including dissolved organic carbon (DOC), calcium, strontium, nitrate, sulfate, sodium, and chloride, and sodium chloride (NaCl) and potassium bicarbonate (KHCO3) were compared in terms of regeneration efficiency. The key results showed 50 to 80% removal of DOC, calcium, strontium, and sulfate, and less than 30% removal of nitrate, sodium, and chloride. In general, NaCl and KHCO3 showed similar regeneration efficiency. Removal of sodium and chloride by CIX was only possible when KHCO3 was used for regeneration due to the potassium and bicarbonate counterions.

Original languageEnglish (US)
Pages (from-to)659-672
Number of pages14
JournalJournal of Water Supply: Research and Technology - AQUA
Volume67
Issue number7
DOIs
StatePublished - Nov 1 2018

Fingerprint

Ion Exchange Resins
Ion exchange resins
Potable water
Drinking Water
Ion Exchange
resin
ion exchange
Ion exchange
Sodium Chloride
drinking water
Impurities
Regeneration
pollutant
Resins
regeneration
chloride
sodium
Strontium
Organic carbon
strontium

Keywords

  • Calcium
  • DOC
  • Groundwater
  • Nitrate
  • Regeneration
  • Strontium

ASJC Scopus subject areas

  • Environmental Engineering
  • Water Science and Technology
  • Health, Toxicology and Mutagenesis

Cite this

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title = "Removal of multiple drinking water contaminants by combined ion exchange resin in a completely mixed flow reactor",
abstract = "This research evaluated the combined ion exchange (CIX) process to give drinking water treatment plants a new option for multiple contaminants removal. The CIX process uses anion exchange resin and cation exchange resin in a single vessel, which enables simultaneous removal of anionic and cationic contaminants. The novel aspect of the CIX process investigated in this research was its application in a small pilot, completely mixed flow reactor (CMFR) with resin recycle and resin regeneration thereby providing realistic performance data. A wide range of contaminants was tested for removal including dissolved organic carbon (DOC), calcium, strontium, nitrate, sulfate, sodium, and chloride, and sodium chloride (NaCl) and potassium bicarbonate (KHCO3) were compared in terms of regeneration efficiency. The key results showed 50 to 80{\%} removal of DOC, calcium, strontium, and sulfate, and less than 30{\%} removal of nitrate, sodium, and chloride. In general, NaCl and KHCO3 showed similar regeneration efficiency. Removal of sodium and chloride by CIX was only possible when KHCO3 was used for regeneration due to the potassium and bicarbonate counterions.",
keywords = "Calcium, DOC, Groundwater, Nitrate, Regeneration, Strontium",
author = "Yue Hu and Treavor Boyer",
year = "2018",
month = "11",
day = "1",
doi = "10.2166/aqua.2018.101",
language = "English (US)",
volume = "67",
pages = "659--672",
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AU - Hu, Yue

AU - Boyer, Treavor

PY - 2018/11/1

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N2 - This research evaluated the combined ion exchange (CIX) process to give drinking water treatment plants a new option for multiple contaminants removal. The CIX process uses anion exchange resin and cation exchange resin in a single vessel, which enables simultaneous removal of anionic and cationic contaminants. The novel aspect of the CIX process investigated in this research was its application in a small pilot, completely mixed flow reactor (CMFR) with resin recycle and resin regeneration thereby providing realistic performance data. A wide range of contaminants was tested for removal including dissolved organic carbon (DOC), calcium, strontium, nitrate, sulfate, sodium, and chloride, and sodium chloride (NaCl) and potassium bicarbonate (KHCO3) were compared in terms of regeneration efficiency. The key results showed 50 to 80% removal of DOC, calcium, strontium, and sulfate, and less than 30% removal of nitrate, sodium, and chloride. In general, NaCl and KHCO3 showed similar regeneration efficiency. Removal of sodium and chloride by CIX was only possible when KHCO3 was used for regeneration due to the potassium and bicarbonate counterions.

AB - This research evaluated the combined ion exchange (CIX) process to give drinking water treatment plants a new option for multiple contaminants removal. The CIX process uses anion exchange resin and cation exchange resin in a single vessel, which enables simultaneous removal of anionic and cationic contaminants. The novel aspect of the CIX process investigated in this research was its application in a small pilot, completely mixed flow reactor (CMFR) with resin recycle and resin regeneration thereby providing realistic performance data. A wide range of contaminants was tested for removal including dissolved organic carbon (DOC), calcium, strontium, nitrate, sulfate, sodium, and chloride, and sodium chloride (NaCl) and potassium bicarbonate (KHCO3) were compared in terms of regeneration efficiency. The key results showed 50 to 80% removal of DOC, calcium, strontium, and sulfate, and less than 30% removal of nitrate, sodium, and chloride. In general, NaCl and KHCO3 showed similar regeneration efficiency. Removal of sodium and chloride by CIX was only possible when KHCO3 was used for regeneration due to the potassium and bicarbonate counterions.

KW - Calcium

KW - DOC

KW - Groundwater

KW - Nitrate

KW - Regeneration

KW - Strontium

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