Trace Organics Removal by Anion Exchange Resins

Anderson, Claude T.; Maier, Walter J.

doi:10.1002/j.1551-8833.1979.tb04349.x

Cited by 30 publications

(6 citation statements)

References 6 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…These resins became of concern after studies demonstrated the strong potential of anion exchange resins for removal of natural organic matter (NOM). Anion exchange resins are more effective for NOM removal than non-ionic resins, activated carbon, and cationic polymers (Anderson and Maier, 1979;Boening et al, 1980;Bolto et al, 2002). Ion exchange resins can also deal with micro-pollutants, such as pentachlorophenol, 2,4,6-trichlorophenol, 2,6-dichlorophenol and phenol (Li and Sengupta, 1998;Carmona et al, 2006).…”

Section: Introductionmentioning

confidence: 99%

Removal of bentazone from micro-polluted water using MIEX resin: Kinetics, equilibrium, and mechanism

Liu

Yan

Drikas

et al. 2011

Journal of Environmental Sciences

View full text Add to dashboard Cite

The contamination of surface and ground water by bentazone has attracted increasing global concern in recent years. We conducted a detailed investigation using MIEX resin to eliminate bentazone from waters. Batch experiments were carried out to evaluate the effect of process parameters, such as retention time, resin amount, and initial pesticide concentration, on removal efficiency of bentazone. Results showed the sorption process was fast and bentazone could be efficiently removed in 30 minutes. The kinetic process of bentazone sorption on MIEX resin was well described by pseudo second-order model and intraparticle diffusion was the rate controlling step. The MIEX resin possessed the highest sorption capacity of 0.2656 mmol/mL for bentazone according to Langmuir fitting. Bentazone is a hydrophobic ionizable organic compound, and both ionic charge and hydrophobic aromatic structure governed the sorption characteristics on MIEX resin. The different removal efficiencies of ionic and non-ionic pesticides, combined with the charge balance equations of bentazone, SO 4 2− , NO 3 − and Cl − , indicated that removal of bentazone using MIEX resin occurred primarily via ion exchange.

show abstract

Section: Introductionmentioning

confidence: 99%

Removal of bentazone from micro-polluted water using MIEX resin: Kinetics, equilibrium, and mechanism

Liu

Yan

Drikas

et al. 2011

Journal of Environmental Sciences

View full text Add to dashboard Cite

show abstract

“…To quantify the effectiveness of these treatment processes, dissolved organic carbon (DOC) is commonly used as a surrogate for NOM. Both conventional polymeric anion exchange resins – and a magnetic ion exchange (MIEX) resin – have previously been evaluated for removing DOC and controlling the formation of DBPs. The major difference between these two classes of resins is their mode of treatment, i.e., conventional polymeric resins are used in a fixed-bed to treat filtered water, whereas MIEX resin is used in a completely mixed flow reactor to treat raw water.…”

Section: Introductionmentioning

confidence: 99%

“…Among ion exchange resins, polyacrylic, macroporous, strong-base anion exchange resins have been shown to be most effective for DOC removal ,, . In addition, previous work by the authors, consisting of laboratory-scale batch experiments and pilot-scale continuous-flow studies, showed that treatment of raw drinking water with MIEX resin was more effective than coagulation at removing DOC and reducing the formation of THMs and HAAs , .…”

Section: Introductionmentioning

confidence: 99%

Stoichiometry of Removal of Natural Organic Matter by Ion Exchange

Boyer

Singer

2007

Environ. Sci. Technol.

143

View full text Add to dashboard Cite

Five anion exchange resins, including a magnetic ion exchange (MIEX) resin, were evaluated for removal of Suwannee River Fulvic Acid (SRFA) in the presence of bicarbonate and chloride. The charge density of SRFA, obtained by potentiometric titration, was used to perform charge balances for ion exchange reactions involving SRFA, bicarbonate, and chloride under different solution conditions. The results clearly show the equivalence of SRFA uptake and chloride release by ion exchange. Although the structure of the anion exchange resins did not affect the stoichiometry of the reaction, the polyacrylic resins did exhibit greater removal of SRFA than the polystyrene resins. The hindered removal of SRFA by the polystyrene resins was hypothesized to be a result of size exclusion. The MIEX resin, which has a polyacrylic structure, performed similarly to the other polyacrylic resins. For the MIEX resin, the separation factor for SRFA over chloride was approximately 8 times greater than for bicarbonate over chloride. This work provides an improved understanding of the interactions between natural organic matter (NOM), inorganic anions, and anion exchange resins, and should result in more effective applications of ion exchange for the removal of NOM in the treatment of drinking water.

show abstract

“…Anion exchange resins have been reported to remove large quantities of NOM from natural waters (Boyer & Singer, 2005; Humbert et al, 2005; Bolto et al, 2002; Singer & Bilyk, 2002; Anderson & Maier, 1979). Generally, an anion exchange resin exchanges a chloride ion from a quaternary ammonium functional group for an organic anion.…”

Section: Introductionmentioning

confidence: 99%

MIEX® and PAC for removal of hydrophilic DBP precursors

2013

View full text Add to dashboard Cite

PAC (60 mg/L) MIEX ® (5 mL/L) Control HPI fraction DBP-disinfection by-product, HAA-haloacetic acid, HPI-hydrophilic, HPO-hydrophobic, MIEX-magnetic ion exchange, NOM-natural organic matter, PAC-powdered activated carbon, THM-trihalomethane, TPI-transphilic Individual HAA and THM species formed in the HPI and HPO fractions were detected at or near the detection limit. Error bars represent the maximum and minimum of triplicate samples. The mean is represented by the bar height. Brominated THM Brominated HAA5 TPI fraction HPO fraction Hanigan et al | http://dx.Error bars represent maximum and minimum of triplicate samples. The mean is represented by the bar height.FIGURE 4 SUVA of Missouri River water by NOM fraction after PAC and MIEX ® treatment 3.5 3.0 2.5 2.0 1.5 1.0 0.5 0.0 SUVA-L/mg-m SUVA PAC (60 mg/L) MIEX® (5 mL/L) Control HPO fraction TPI fraction HPI fraction Hanigan et al | http://dx.

show abstract

Trace Organics Removal by Anion Exchange Resins

Cited by 30 publications

References 6 publications

Removal of bentazone from micro-polluted water using MIEX resin: Kinetics, equilibrium, and mechanism

Removal of bentazone from micro-polluted water using MIEX resin: Kinetics, equilibrium, and mechanism

Stoichiometry of Removal of Natural Organic Matter by Ion Exchange

MIEX® and PAC for removal of hydrophilic DBP precursors

Contact Info

Product

Resources

About