Removal of Hazardous Substances from Water Using Ultrafiltration in Conjunction with Soluble Polymers

Geckeler, Kurt E.; Volchek, Konstantin

doi:10.1021/es950326l

Cited by 218 publications

(113 citation statements)

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“…Of these technologies, the most versatile and widely used is biological denitrification [8] which uses an anoxic environment to completely remove nitrate; the chemically bound oxygen in nitrate acts as a terminal electron acceptor, liberating nitrogen (N 2 ) gas without generating brine as a by-product [9,10,11]. However, membrane filtration has been increasingly used to remove various contaminants from water [12][13][14][15][16]. Tight membrane filtration methods such as reverse osmosis (RO) filtration and nanofiltration (NF) can effectively remove nitrate from contaminated water, but such dense membranes are relatively costly and require electricity.…”

Section: Figure 1 Nitrate Concentrations In Groundwater From 27 Watementioning

confidence: 99%

“…Several studies have shown that micellar-enhanced ultrafiltration can effectively remove organic and inorganic pollutants from aqueous phases [12,14,[17][18][19][20][21]. In the present article, we investigate nitrate removal by using three commercially available cross-flow polyethersulfone UF-membranes with different molecular-weight cut-offs (MWCOs).…”

Section: Figure 1 Nitrate Concentrations In Groundwater From 27 Watementioning

confidence: 99%

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Nitrate Removal From Water Using Surface-Modified Ultrafiltration Membranes

Habuda-Stanić¹,

Nujić²,

Santo³

2014

e-GFOS

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Elevated nitrate concentrations in natural water sources are a worldwide concern due to the extensive levels of soil N-fertilization. This study investigates three commercially available polyethersulfone (PES) ultrafiltration (UF) membranes with different molecular weight cut-offs (5, 10, and 30 kDa), which we modified with a cationic surfactant, cetylpyridinium chloride to improve their nitrate removal. The nitrate removal efficiency of these membranes was examinated as functions of initial nitrate concentration, pH, and permeate flux. The best nitrate removal efficiency was obtained with a 5 kDa surface-modified UF membrane.Key words: nitrate removal, UF membrane, permeate flux, cetylpyridinium chloride, membrane surfacemodificaton UKLANJANJE NITRATA IZ VODE POVRŠINSKI MODIFICIRANIM ULTRAFILTRACIJSKIM MEMBRANAMASažetak: Pojava povećanih koncentracija nitrata u prirodnim vodama diljem svijeta najčešće je posljedica prekomjerne uporabe mineralnih gnojiva u poljoprivredi. U ovom radu ispitana je mogućnost primjene tri komercijalno dostupne površinski modificirane polietersulfonske (PES) ultrafiltracijske (UF) membrane s različitim graničnim molekulskim masama (5, 10 and 30 kDa). Površinska modifikacija UF membrana načinjena je primjenom surfaktanta cetilpiridin klorida. Učinkovitost uklanjanja nitrata ispitana je ovisno o početnoj koncentraciji nitrata, pH vrijednosti otopine i fluksu permeata. Najbolji učinak postignut je primjenom površinski modificirane membrane s graničnom molekularnom masom od 5 kDa.

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Section: Figure 1 Nitrate Concentrations In Groundwater From 27 Watementioning

confidence: 99%

Section: Figure 1 Nitrate Concentrations In Groundwater From 27 Watementioning

confidence: 99%

Nitrate Removal From Water Using Surface-Modified Ultrafiltration Membranes

Habuda-Stanić¹,

Nujić²,

Santo³

2014

e-GFOS

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“…A good review of the area up to 1994 was published by Geckeler and Volchek (1996). A variety of terms and associated acronyms have been used in the literature for this technology including polymer-supported ultrafiltration (PSU) (Geckeler, 1996), liquid-phase polymer-based retention (LPR) (Spivakov, 1989), polyelectolyte-enhanced ultrafiltration (PEUF) (Scamehorn, 1990), and polymer-assisted ultrafiltration (PAUF) (Smith, 1995). The term Polymer Filtration was adopted for this technology by PolyIonix Separation Technologies, Inc., during the course of commercialization activities (Thompson et al, 1999).…”

Section: Polymer Filtration Technologymentioning

confidence: 99%

Removal of Pu-238 from aqueous process streams using a polymer filtration process

Jarvinen¹,

Purdy²,

Rau³

et al. 2001

AIP Conference Proceedings

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LosAlamos NationalLaboratory an affirmativeaction/equalopportunityemployer,is operated bythe Universityof Californiaforthe U.S. Departmentof Energy under contractW-7405-ENG-S6. By acceptanceof thisarticle, the publisherrecognizesthatthe U.S. Government retainsa nonexclusive,royalty-freelicenseto publishor reproducethe publishedformofthiscontribution, or to allowotherato do ao,for U.S. Governmentpurposes.LosAlamos NationalLaboratoryrequeststhatthe pubiisheridentifythisarticle as work performedunderthe auspicesof the U.S. Departmentof Energy.LosAlamoa NationalLaboratorystronglysupportsacademicfreedom and a researched% rightto publish;as an institution, however,the Laboratorydoes notendorsethe viewpointof a publicationor guarantee itstechnicalcorrectness. Abstract. A glovebox facility is under construction at Los Alamos that will recover a significant quantity of the impure Pu-238 that exists in scrap and residues fkom past production operations. The general flowsheet consists of milling, acid dissolution, ion exchange, precipitation, calcinationj oxygen isotope exchange, and waste treatment operations. As part of the waste treatment operations we are using polymer filtration to remove Pu-238 to meet facility discharge limits. Polymer filtration (PF) technology uses water-soluble polymers prepared with selective receptor sites to sequester metal ions, organic molecules, and other species from dilute aqueous solutions. The water-soluble polymers have a sufilciently large molecular size that they can be separated and concentrated using ukmflltration (UF) methods. Water and small, unbound components of the solution pass freely through the UF membrane while the polymer concentrates in the retentate. The permeate stream is "cleaned" of the components bound to the polymer and can be used in further processing steps or discharged. The concentrated retentate solution can be treated to give a final waste form or to release the sequestered species from the reeeptor sites by adjusting the conditions in the retentate solution. The PF technology is part of our work to develop a safe, reliable and cost-effective scrap recovery operation with high process efficiencies, minimal waste generation, and high product purity. Form636

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“…This approach of using water-soluble metal-binding polymers has been in the literature for almost 30 years, but to date no practical application for waste waters has been reported for actinide preconcentration and measurement. 2 We have been developing this analytical separatiodpreconcentration technique for the determination of ultra-low concentrations of alpha-emitting actinides from waste waters.…”

Section: Introductionmentioning

confidence: 99%

Preconcentration of low levels of americium and plutonium from waste waters by synthetic water-soluble metal-binding polymers with ultrafiltration

Smith

Gibson

Jarvinen

et al. 1998

J Radioanal Nucl Chem

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r Los Alamos National Laboratory, an affirmative actidequal opportunity employer, is operated by the University of California for the US. Department of . By acceptance of this article, the publisher recognizes that the U.S. Government retains a nonexclusive, royalty-free license to publish OT reproduce the published fonn of this contribution, or to allow others to do SO, for U.S. Government purposes. Lo6 Alamos National Laboratory requests that the publisher identify this article as work performed under the auspices of the U.S. Department of Energy. The Lo6 Alamos National Laboratory strongly supports academic freedom and a researchets tight to publish; as an institution, however, the Laboratory does not endorse the viewpoint of a publication or guarantee its technical correctness. A preconcentration approach to assist in the measurement of low levels of americium and plutonium in waste waters has been developed based on the concept of using watersoluble metal-binding polymers in combination with ultrafiltration. The method has been optimized to give over 90% recovery and accountability from actual waste water.

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Removal of Hazardous Substances from Water Using Ultrafiltration in Conjunction with Soluble Polymers

Cited by 218 publications

References 39 publications

Nitrate Removal From Water Using Surface-Modified Ultrafiltration Membranes

Nitrate Removal From Water Using Surface-Modified Ultrafiltration Membranes

Removal of Pu-238 from aqueous process streams using a polymer filtration process

Preconcentration of low levels of americium and plutonium from waste waters by synthetic water-soluble metal-binding polymers with ultrafiltration

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