Simultaneous removal of dissolved organic matter and bromide from drinking water source by anion exchange resins for controlling disinfection by-products

Phetrak, Athit; Lohwacharin, Jenyuk; Sakai, Hiromitsu; Murakami, Michio; Oguma, Kumiko; Takizawa, Satoshi

doi:10.1016/s1001-0742(13)60602-6

Cited by 27 publications

(27 citation statements)

References 21 publications

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“…Researchers have also developed alternative testing procedures, such as multiple-loading jar tests and fluidized bed column tests, to investigate other process configurations for MIEX resin. MIEX tests have been conducted using drinking water sources from all over the world, e.g., Australia, China, Japan, Poland, Turkey, UK, and USA [6,8,9,[23][24][25]. Most data for MIEX resin is from NaCl regeneration with limited data from NaHCO 3 regeneration [18,21,[26][27][28].…”

Section: Dom Removal From Drinking Waters Sourcesmentioning

confidence: 99%

“…However, the effectiveness of MIEX resin to remove both bromide and DOC has shown mixed results. Depending on the water source and MIEX resin dose, bromide removal by MIEX resin can vary from >90 to <10 % [6,25,[31][32][33]41]. However, an explanation for the variable removal of bromide by MIEX resin is often lacking from a discussion of the results.…”

Section: Removal Of Inorganic and Synthetic Organic Chemicals Inorganmentioning

confidence: 99%

“…MIEX resin was compared with six other commercially available strong-base anion exchange resins, which are marketed for organics removal, and showed faster and greater reductions in UVA254 from 5 to 30 min [12•]. As mixing times approach hours, MIEX resin showed similar DOC removal as other polyacrylic resins and some polystyrene resins [25]. This was especially true when MIEX resin was compared with PFA444 resin (strong-base, gel, polystyrene) using a two-stage countercurrent configuration where both resins showed similar removals of DOC [12•].…”

Section: Comparison With Other Anion Exchange Resinsmentioning

confidence: 99%

“…This was especially true when MIEX resin was compared with PFA444 resin (strong-base, gel, polystyrene) using a two-stage countercurrent configuration where both resins showed similar removals of DOC [12•]. MIEX resin showed the lowest removal of bromide among a variety of polyacrylic and polystyrene anion exchange resins [25]. However, when comparing MIEX resin to conventional anion exchange resins for removal of inorganic anions, it is important to consider that MIEX resin has a lower strong-base anion exchange capacity, e.g., 0.52 meq/mL MIEX resin and 1.4 meq/mL IRA400 resin.…”

Section: Comparison With Other Anion Exchange Resinsmentioning

confidence: 99%

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Removal of Dissolved Organic Matter by Magnetic Ion Exchange Resin

Boyer

2015

Curr Pollution Rep

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This article provides a state-of-the-art review on the uses of magnetic ion exchange (MIEX) resin in drinking water and wastewater treatment, with emphasis on removal of dissolved organic matter (DOM) from drinking water and wastewater, regeneration efficiency, removal of inorganic and synthetic organic chemicals, comparison with other anion exchange resins, and integration with other physical-chemical processes. Through laboratory jar tests, pilot plant tests, and full-scale installations for a variety of drinking water sources, MIEX resin can achieve 30-80 % removal of dissolved organic carbon (DOC), which is often higher than alum or ferric coagulation. In addition, MIEX resin has been shown to remove hydrophilic, transphilic, and hydrophobic fractions of DOM and a wide range of molecular weight fractions of DOM. As a result, MIEX pretreatment results in substantial reductions in the formation of trihalomethanes and haloacetic acids upon chlorination. MIEX resin can achieve bromide removal in the range of 10-50 %, with higher bromide removal in waters with low DOC, low alkalinity, and low sulfate. However, there are commercially available anion exchange resins that are more selective for bromide than MIEX resin. MIEX resin has been investigated in combination with coagulation, activated carbon adsorption, membrane separation, lime softening, and ozonation. MIEX pretreatment has been shown to reduce downstream chemical requirements and improve the operation of downstream processes. This is most evident for coagulation and ozonation where the coagulant dose can be reduced by 50-75 % and the ozone concentration can be increased by 40-65 %. In general, MIEX pretreatment shows minor reductions in membrane fouling. Future research should continue to investigate the integration of MIEX treatment with other processes.

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Section: Dom Removal From Drinking Waters Sourcesmentioning

confidence: 99%

Section: Removal Of Inorganic and Synthetic Organic Chemicals Inorganmentioning

confidence: 99%

Section: Comparison With Other Anion Exchange Resinsmentioning

confidence: 99%

Section: Comparison With Other Anion Exchange Resinsmentioning

confidence: 99%

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Removal of Dissolved Organic Matter by Magnetic Ion Exchange Resin

Boyer

2015

Curr Pollution Rep

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“…Of increasing importance, portions of DOC that absorb ultraviolet (UV) light at a wavelength of 254 nm (UV 254 ) are representative of the more reactive portions of DOC that bind to chlorine during disinfection and yield carcinogenic DBPs. Magnetic ion exchange (MIEX) is appealing for a variety of reasons: (1) MIEX has been shown to remove a higher fraction of DBP precursors than coagulation (Boyer & Singer , Drikas et al ), (2) resins may be repeatedly regenerated and reused, decreasing long‐term chemical demand for coagulants such as alum, (3) MIEX has been shown to reduce the UV 254 ‐absorbing compounds significantly better than coagulation, thus significantly reducing harmful DBPs, and (4) MIEX provides the additional benefit of removing bromide (Phetrak et al , Singer & Bilyk ), which is a constituent of many DBP compounds (Krasner et al ). For these reasons, MIEX has gained popularity in recent decades.…”

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confidence: 99%

Evaluating Options for Regenerant Brine Reuse in Magnetic Ion Exchange Systems

2018

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The purpose of this work was to provide an empirical foundation for decisions regarding regenerant brine management in anion exchange systems for the removal of compounds that absorb ultraviolet (UV) light at a wavelength of 254 nm (UV 254 ) in drinking water treatment. Regenerant performance was assessed for fresh regenerant brine, reused regenerant brine, and used brine that had been treated with aluminum sulfate (alum) before reuse. Jar tests were conducted to examine the UV 254 reduction achieved by resins treated with each of these regenerants. Over three regeneration cycles, resin treated with continuously reused regenerant did not display a significant decline in UV 254 reduction. While treatment with alum was effective for removing UV 254 -absorbing compounds from used regenerant brine, this treatment did not improve the brine's performance as a regenerant. These results demonstrate that regenerant brine may be reused several times without any intermediate treatment, which provides a cost-saving solution for treatment plants seeking to install anion exchange systems.

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