TY - JOUR
T1 - Alkaline earth metal cation exchange
T2 - Effect of mobile counterion and dissolved organic matter
AU - Indarawis, Katrina
AU - Boyer, Treavor H.
PY - 2012/4/17
Y1 - 2012/4/17
N2 - The goal of this research was to provide an improved understanding of the interactions between alkaline earth metals and DOM under conditions that are encountered during drinking water treatment with particular focus on cation exchange. Both magnetically enhanced and nonmagnetic cation exchange resins were converted to Na, Mg, Ca, Sr, and Ba mobile counterion forms as a novel approach to investigate the exchange behavior between the cations and the interactions between the cations and DOM. The results show that cation exchange is a robust process for removal of Ca 2+ and Mg 2+ considering competition with cations on the resin surface and presence of DOM. DOM was actively involved during the cation exchange process through complexation, adsorption, and coprecipitation reactions. In addition to advancing the understanding of ion exchange processes for water treatment, the results of this work are applicable to membrane pretreatment to minimize fouling, treatment of membrane concentrate, and precipitative softening.
AB - The goal of this research was to provide an improved understanding of the interactions between alkaline earth metals and DOM under conditions that are encountered during drinking water treatment with particular focus on cation exchange. Both magnetically enhanced and nonmagnetic cation exchange resins were converted to Na, Mg, Ca, Sr, and Ba mobile counterion forms as a novel approach to investigate the exchange behavior between the cations and the interactions between the cations and DOM. The results show that cation exchange is a robust process for removal of Ca 2+ and Mg 2+ considering competition with cations on the resin surface and presence of DOM. DOM was actively involved during the cation exchange process through complexation, adsorption, and coprecipitation reactions. In addition to advancing the understanding of ion exchange processes for water treatment, the results of this work are applicable to membrane pretreatment to minimize fouling, treatment of membrane concentrate, and precipitative softening.
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U2 - 10.1021/es204289c
DO - 10.1021/es204289c
M3 - Article
C2 - 22424449
AN - SCOPUS:84859812711
SN - 0013-936X
VL - 46
SP - 4591
EP - 4598
JO - Environmental Science and Technology
JF - Environmental Science and Technology
IS - 8
ER -