Superposition of anion and cation exchange for removal of natural water ions

Katrina A. Indarawis, Treavor Boyer

Research output: Contribution to journalArticle

10 Citations (Scopus)

Abstract

Ion exchange in a fluidized bed has been shown to be an effective design for anion and cation exchange. However, little is known about combining anion and cation exchange resins in the same vessel. More specifically, can combined ion exchange be predicted by adding the removal of anions during anion exchange to the removal of cations during cation exchange? Results indicated that combined ion exchange can reduce precipitation of sparingly soluble minerals, such as CaCO3, in the bulk solution by simultaneously removing calcium and bicarbonate. Inorganic cations dominated the ion exchange behavior during these processes, and organic anions such as dissolved organic matter (DOM) behaved the same in combined ion exchange as in anion exchange. Results showed that it is possible to estimate sulfate and magnesium removal during combined ion exchange by rules of superposition, as well as calcium when initial concentration of calcium is low. Synthetic waters with varying divalent cations were compared to a natural groundwater, both of which had low organics and high divalent cations. Results showed similar behavior between natural and synthetic waters with varying types of DOM. The effect of combined ion exchange on separation factors is also calculated and discussed.

Original languageEnglish (US)
Pages (from-to)112-119
Number of pages8
JournalSeparation and Purification Technology
Volume118
DOIs
StatePublished - 2013
Externally publishedYes

Fingerprint

Anions
Cations
Ion exchange
Negative ions
Positive ions
Ions
Water
Divalent Cations
Calcium
Biological materials
Anion Exchange Resins
Cation Exchange Resins
Magnesium Sulfate
Fluidized beds
Minerals
Groundwater
Magnesium
Resins

Keywords

  • Calcium
  • Combined ion exchange
  • Dissolved organic matter
  • MIEX
  • Separation factors

ASJC Scopus subject areas

  • Analytical Chemistry
  • Filtration and Separation

Cite this

Superposition of anion and cation exchange for removal of natural water ions. / Indarawis, Katrina A.; Boyer, Treavor.

In: Separation and Purification Technology, Vol. 118, 2013, p. 112-119.

Research output: Contribution to journalArticle

@article{b2edf6ebe8434b2797692f5bf41bb98e,
title = "Superposition of anion and cation exchange for removal of natural water ions",
abstract = "Ion exchange in a fluidized bed has been shown to be an effective design for anion and cation exchange. However, little is known about combining anion and cation exchange resins in the same vessel. More specifically, can combined ion exchange be predicted by adding the removal of anions during anion exchange to the removal of cations during cation exchange? Results indicated that combined ion exchange can reduce precipitation of sparingly soluble minerals, such as CaCO3, in the bulk solution by simultaneously removing calcium and bicarbonate. Inorganic cations dominated the ion exchange behavior during these processes, and organic anions such as dissolved organic matter (DOM) behaved the same in combined ion exchange as in anion exchange. Results showed that it is possible to estimate sulfate and magnesium removal during combined ion exchange by rules of superposition, as well as calcium when initial concentration of calcium is low. Synthetic waters with varying divalent cations were compared to a natural groundwater, both of which had low organics and high divalent cations. Results showed similar behavior between natural and synthetic waters with varying types of DOM. The effect of combined ion exchange on separation factors is also calculated and discussed.",
keywords = "Calcium, Combined ion exchange, Dissolved organic matter, MIEX, Separation factors",
author = "Indarawis, {Katrina A.} and Treavor Boyer",
year = "2013",
doi = "10.1016/j.seppur.2013.06.044",
language = "English (US)",
volume = "118",
pages = "112--119",
journal = "Separation and Purification Technology",
issn = "1383-5866",
publisher = "Elsevier",

}

TY - JOUR

T1 - Superposition of anion and cation exchange for removal of natural water ions

AU - Indarawis, Katrina A.

AU - Boyer, Treavor

PY - 2013

Y1 - 2013

N2 - Ion exchange in a fluidized bed has been shown to be an effective design for anion and cation exchange. However, little is known about combining anion and cation exchange resins in the same vessel. More specifically, can combined ion exchange be predicted by adding the removal of anions during anion exchange to the removal of cations during cation exchange? Results indicated that combined ion exchange can reduce precipitation of sparingly soluble minerals, such as CaCO3, in the bulk solution by simultaneously removing calcium and bicarbonate. Inorganic cations dominated the ion exchange behavior during these processes, and organic anions such as dissolved organic matter (DOM) behaved the same in combined ion exchange as in anion exchange. Results showed that it is possible to estimate sulfate and magnesium removal during combined ion exchange by rules of superposition, as well as calcium when initial concentration of calcium is low. Synthetic waters with varying divalent cations were compared to a natural groundwater, both of which had low organics and high divalent cations. Results showed similar behavior between natural and synthetic waters with varying types of DOM. The effect of combined ion exchange on separation factors is also calculated and discussed.

AB - Ion exchange in a fluidized bed has been shown to be an effective design for anion and cation exchange. However, little is known about combining anion and cation exchange resins in the same vessel. More specifically, can combined ion exchange be predicted by adding the removal of anions during anion exchange to the removal of cations during cation exchange? Results indicated that combined ion exchange can reduce precipitation of sparingly soluble minerals, such as CaCO3, in the bulk solution by simultaneously removing calcium and bicarbonate. Inorganic cations dominated the ion exchange behavior during these processes, and organic anions such as dissolved organic matter (DOM) behaved the same in combined ion exchange as in anion exchange. Results showed that it is possible to estimate sulfate and magnesium removal during combined ion exchange by rules of superposition, as well as calcium when initial concentration of calcium is low. Synthetic waters with varying divalent cations were compared to a natural groundwater, both of which had low organics and high divalent cations. Results showed similar behavior between natural and synthetic waters with varying types of DOM. The effect of combined ion exchange on separation factors is also calculated and discussed.

KW - Calcium

KW - Combined ion exchange

KW - Dissolved organic matter

KW - MIEX

KW - Separation factors

UR - http://www.scopus.com/inward/record.url?scp=84880736150&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=84880736150&partnerID=8YFLogxK

U2 - 10.1016/j.seppur.2013.06.044

DO - 10.1016/j.seppur.2013.06.044

M3 - Article

VL - 118

SP - 112

EP - 119

JO - Separation and Purification Technology

JF - Separation and Purification Technology

SN - 1383-5866

ER -