Hollow-fiber-supported liquid membranes with improved stability for nitrate removal

Kemperman, A.J.B.; Rolevink, Hendrikus H.M.; Boomgaard, Th. van den; Strathmann, H.

doi:10.1016/s1383-5866(97)00043-9

Cited by 16 publications

(9 citation statements)

References 9 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…There are also problems due to the transmembrane pressure difference, rather low permeation rate because of difficulties in preparing of very thin membranes with high stability, and chemical degradation of carriers [22]. Some researchers have tried to minimize the loss of membrane liquid in SLMs by methods such as gelation of the membrane solution in the pores of supported membrane [23], coating of an SLM surface with a thin gel layer [23] and coating with a thin polymer layer by interfacial polymerization technique [24]. However, these treatments are technically difficult and may induce additional costs on the process while they may retard the transport flux due to higher mass transfer resistance of the membrane-side.…”

Section: Introductionmentioning

confidence: 99%

Study on removal of cadmium by hybrid liquid membrane process

Mortaheb

Zolfaghari

Mokhtarani

et al. 2010

Journal of Hazardous Materials

View full text Add to dashboard Cite

Section: Introductionmentioning

confidence: 99%

Study on removal of cadmium by hybrid liquid membrane process

Mortaheb

Zolfaghari

Mokhtarani

et al. 2010

Journal of Hazardous Materials

View full text Add to dashboard Cite

“…[7][8][9] However, specific adsorbents have recently been considered as one of the most promising techniques. 10 Specific adsorbents consist of a ligand (e.g., ion-exchange material) that specifically interacts with the organic and inorganic pollutants and a carrier matrix that may be an inorganic material (e.g., aluminum oxide, silica, or glass) or polymer microbeads [e.g., polystyrene, starch, chitosan, cellulose, poly(maleic anhydride), or poly(methyl methacrylate)]. [11][12][13][14][15][16] A wide variety of complexing agents may be used as ligands in the design of novel adsorbents.…”

Section: Introductionmentioning

confidence: 99%

Dye‐affinity microbeads for removal of phenols and nitrophenols from aquatic systems

Deni̇zli̇

Ökan

Uçar

2002

J of Applied Polymer Sci

View full text Add to dashboard Cite

Alkali Blue 6B attached poly(2-hydroxyethyl methacrylate) (PHEMA) microbeads were investigated as dye-affinity adsorbents for the removal of phenol and nitrophenols (i.e., 2-nitrophenol, 4-nitrophenol, and 2,4-dinitrophenol) from aqueous solutions. PHEMA microbeads were prepared by radical-suspension polymerization of HEMA in the presence of azobisisobutyronitrile as the initiator. These microbeads with a swelling ratio of 55% and carrying 23.6 mol Alkali Blue 6B/g polymer were then used in the removal of phenol and nitrophenols from aqueous media. The adsorption was fast in all cases (20-min equilibrium time). The maximum adsorptions of phenols onto the microbeads carrying Alkali Blue 6B were 145.2 mol/g for phenol, 87.8 mol/g for 2,4-dinitrophenol, 112.6 mol/g for 4-nitrophenol, and 104.3 mol/g for 2-nitrophenol. The affinity order was phenol Ͼ 4-nitrophenol Ͼ 2-nitrophenol Ͼ 2,4-dinitrophenol. The adsorption of nitrophenols decreased with increasing pH. Desorption of nitrophenols was achieved using a 30% (v/v) methanol solution. The microbeads carrying Alkali Blue 6B are suitable for repeated use for more than five cycles without a noticeable loss of adsorption capacity.

show abstract

“…The main reason for the decrease in the SLM stability was attributed to the loss of carrier solvent from the membrane pores. There have been several attempts to improve the SLM stability by techniques such as interfacial polymerization (37) or coating the surface of the membrane with a thin gel layer (38). Our studies, however, have indicated that diluent plays a significant role in the stability of the supported liquid membranes (25,26,39,40).…”

Section: Stability Of Membranementioning

confidence: 78%

Carrier Facilitated Transport of Europium(III) Across Supported Liquid Membranes ContainingN,N,N′,N′-tetra-2-ethylhexyl-3-oxapentane-diamide (T2EHDGA) as the Extractant

Panja¹,

Mohapatra²,

Misra³

et al. 2011

Separation Science and Technology

View full text Add to dashboard Cite

Studies on the solvent extraction and pertraction behavior of europium(III) was carried out from acidic feed solutions using N,N,N 0 ,N 0 -tetra-2-ethylhexyl-3-oxapentane-diamide (T2EHDGA) in n-dodecane as the solvent. The nature of the extracted species from the solvent extraction studies conformed to Eu(NO 3 ) 3 Á 3T2EHDGA which is in variance with the analogous Eu(III) -TODGA (linear homolog of T2EHDGA) extraction system. The transport behavior of Eu(III) was investigated from a feed containing 3.0 M HNO 3 into a receiver phase containing 0.01 M HNO 3 across a PTFE flat sheet supported liquid membrane (SLM) containing 0.2 M T2EHDGA in n-dodecane as the carrier solvent and 30% iso-decanol as the phase modifier. Effects of feed acidity, carrier extractant concentration, membrane pore size, and Eu concentration in the feed on the transport rates of Eu(III) were also investigated. Membrane diffusion coefficient (D o ) for the pertracted species was calculated using the Wilke-Chang equation as 4.25 Â 10 À6 cm 2 Á s À1 . The influence of Eu concentration on the flux was also investigated. The role of temperature on the transport rates was investigated and the thermodynamic parameters were calculated.

show abstract

Hollow-fiber-supported liquid membranes with improved stability for nitrate removal

Cited by 16 publications

References 9 publications

Study on removal of cadmium by hybrid liquid membrane process

Study on removal of cadmium by hybrid liquid membrane process

Dye‐affinity microbeads for removal of phenols and nitrophenols from aquatic systems

Carrier Facilitated Transport of Europium(III) Across Supported Liquid Membranes ContainingN,N,N′,N′-tetra-2-ethylhexyl-3-oxapentane-diamide (T2EHDGA) as the Extractant

Contact Info

Product

Resources

About