Hybrid anion exchanger for trace phosphate removal from water and wastewater

Blaney, Lee; Cinar, Suna; SenGupta, Arup K.

doi:10.1016/j.watres.2007.01.008

Cited by 415 publications

(230 citation statements)

References 30 publications

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“…Of the various methods of P removal, adsorption/ion exchange methods are promising, because they are simple and economical, result in less sludge production and therefore experience minimal disposal problems [3]. Furthermore, these methods seem to be the most suitable for small water supplies contaminated by P because of its simplicity, effectiveness, selective removal in the presence of other ions, easy recovery of P and relatively low cost [4]. These methods are also able to handle shock loadings and operate over a wide range of temperatures.…”

Section: Introductionmentioning

confidence: 99%

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Phosphate removal from water using an iron oxide impregnated strong base anion exchange resin

Nur

Johir

Loganathan

et al. 2014

Journal of Industrial and Engineering Chemistry

114

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Removing phosphate from water is important as it causes eutrophication, which in turn has a harmful effect on aquatic life, resulting in a reduction in biodiversity. On the other hand, recovery of phosphate from phosphorus containing wastewater is essential for developing an alternative source of phosphorus to overcome the global challenge of phosphorus scarcity.Phosphate removal from aqueous solutions was studied using an iron oxide impregnated strong base anion exchange resin, Purolite FerrIX A33E in batch and fixed-bed column experiments. Phosphate adsorption in the batch study satisfactorily fitted to the Langmuir isotherm with a maximum adsorption capacity of 48 mg P/g. In the column study, increase in inlet phosphate concentration (5-30 mg P/L), and filtration velocity (2.5-10 m/h) resulted in faster breakthrough times and increase in breakthrough adsorption capacities. Increase in bed height (3-19 cm) also increased adsorption capacity but the breakthrough time was slower.The breakthrough data were reasonably well described using the empirical models of Bohart-2 Adams, Thomas, and Yoon-Nelson, except for high bed heights. Phosphate adsorbed was effectively desorbed using 1M NaOH and the adsorbent was regenerated after each of three adsorption/desorption cycles by maintaining the adsorption capacity at > 90% of the original value. Greater than 99.5% of the desorbed P was recovered by precipitation using CaCl 2 .

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Section: Introductionmentioning

confidence: 99%

“…Therefore, they used two columns in series, one with Purolite for removing nitrate followed by the other with hydrous ferric oxide for the removal of phosphate from water containing both these anions. Others used polymeric anion exchanger bound with ferric oxide nanoparticles to successfully remove phosphate [4,6].…”

Section: Introductionmentioning

confidence: 99%

Phosphate removal from water using an iron oxide impregnated strong base anion exchange resin

Nur

Johir

Loganathan

et al. 2014

Journal of Industrial and Engineering Chemistry

114

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“…In this regard, the modifications of polymers or 7 other supports with NPs have been used recently [68,69] [74,75]. Anionic resins impregnated with HFO were studied for phosphorus removal [76,77,78,79]. In general, polymeric anion exchange resins have low phosphate exchange capacity and poor selectivity factors against common ions present in wastewater (chloride, sulfate, bicarbonate, nitrate and dissolved organic matter) [19].…”

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confidence: 99%

Phosphate removal and recovery from water using nanocomposite of immobilized magnetite nanoparticles on cationic polymer

Markeb

Alonso

Dorado

et al. 2016

Environmental Technology

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Highlights• Immobilization of magnetite nanoparticles on cationic polymer was synthesized.• Phosphate removal using magnetite based nanocomposites was tested.• Adsorption isotherms of phosphate at two pH; 5 and 7 were performed.• Different isotherms models were applied for experimental data fitting.• Regeneration and reusability of the magnetite based nanocomposites were carried out. Graphical Abstract 2 AbstractA novel nanocomposite based on magnetite nanoparticles (Fe3O4-NPs) immobilized on the surface of the cationic exchange polymer, C100, using a modification of the coprecipitation method was developed to obtain magnetic nanocomposites (NCs) for phosphate removal and recovery from water. High resolution TEM-EDS, SEM, XRD, and ICP-OES were used to characterize the NCs. The continuous adsorption process by the so-called breakthrough curves was used to determine the adsorption capacity of the Fe3O4 based NC. The adsorption 3 capacity conditions were studied under different conditions (pH, phosphate concentration and concentration of NPs). The optimum concentration of iron in the NC for phosphate removal was 23.59 mgFe/gNC. The sorption isotherms of this material were performed at pHs 5 and 7.Taking into account the real application of this novel material in real water, the experiments were performed at pH 7, achieving an adsorption capacity higher than 4.9 mgPO4-P/gNC.Moreover, Freundlich, Langmuir and a combination of them fit the experimental data and were used for interpreting the influence of pH on the sorption and the adsorption mechanism for this novel material. Furthermore, regeneration and reusability of the nanocomposite were tested obtaining 97.5 % recovery of phosphate for the first cycle and at least 7 cycles of adsorptiondesorption were carried out with more than 40% of recovery. Thus, this work described a novel magnetic nanoadsorbent with promoting properties for phosphate recovery in wastewater.

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“…DOW-HFO 52 ± 0.4 6% NaCl, pH = 8 8 ± 1.9 AA neutral 32 ± 1.4 6% NaCl, pH = 7.5 31 ± 4.0 AA basic 28 ± 1.1 6% NaCl, pH = 9.5 53 ± 14 a Average results of triplicate measures ±1 standard deviation. b pH of all regenerants is that at which the media was prepared, with the exception of LayneRT™, for which regenerant pH was based on Blaney et al (2007). 35 Column IX studies To determine exchange capacity under more realistic operating conditions, the top three performing anion resins and zeolite were tested using rapid small-scale column tests, as illustrated in Fig.…”

Section: Batch IX Studiesmentioning

confidence: 99%

Ion exchange-precipitation for nutrient recovery from dilute wastewater

Williams

Zitomer

Mayer

2015

Environ. Sci.: Water Res. Technol.

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Regulated phosphorus (P) and nitrogen (N) discharges and the cost of fertilizer provide economic drivers for nutrient removal and recovery from wastewater. This study used ion exchange (IX) in dilute (domestic) wastewater to concentrate nutrients with subsequent recovery by struvite precipitation. This is the first tertiary wastewater treatment study directly comparing P removal using a range of Fe, Cu, and Al-based media followed by clinoptilolite IX columns for N removal and precipitation using the combined regenerants. Phosphate removal prior to breakthrough was 0.5-2.0 g P Lmedia −1 , providing effluent concentrations <0.1 mg L −1 PO4-P and <0.2 mg L −1 NH4-N for ≥80 bed volumes. Dow-FeCu resin provided effective P removal, efficient neutral pH regeneration and 560 mg P L −1 in the regeneration eluate (≥100× concentration factor). Exchange capacity of clinoptilolite in column mode was 3.9-6.1 g N Lmedia −1 prior to breakthrough. Precipitation using the combined cation and anion regenerants resulted in a maximum of 74% P removal using Dow-FeCu. Precipitates contained impurities, including Al 3+ , Ca 2+ , and Fe. Overall, the IX-precipitation recovery process removed ≥98% P and 95% N and precipitates contained 13% P and 1.6% N. This sequential process can NOT THE PUBLISHED VERSION; this is the author's final, peer-reviewed manuscript. The published version may be accessed by following the link in the citation at the bottom of the page.

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Hybrid anion exchanger for trace phosphate removal from water and wastewater

Cited by 415 publications

References 30 publications

Phosphate removal from water using an iron oxide impregnated strong base anion exchange resin

Phosphate removal from water using an iron oxide impregnated strong base anion exchange resin

Phosphate removal and recovery from water using nanocomposite of immobilized magnetite nanoparticles on cationic polymer

Ion exchange-precipitation for nutrient recovery from dilute wastewater

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