Separation Science and Technology (SEP SCI TECHNOL)

Publisher: Taylor & Francis

Journal description

Exploring the wide range of separation phenomena, Separation Science and Technology reviews the newest concepts and techniques for dealing with problems encountered by professionals in this rapidly expanding field. It offers authoritative and critical articles, notes, and reviews on all the varied aspects of separation, including separation theory, membranes, extraction, flocculation, crystallization, distillation, ultrafiltration, chromatography, electrophoresis, foam fractionation, adsorption, and ion exchange.

Current impact factor: 1.17

Impact Factor Rankings

2016 Impact Factor Available summer 2017
2014 / 2015 Impact Factor 1.171
2013 Impact Factor 1.2
2012 Impact Factor 1.164
2011 Impact Factor 1.088
2010 Impact Factor 1.015
2009 Impact Factor 1.028
2008 Impact Factor 1.139
2007 Impact Factor 1.048
2006 Impact Factor 0.824
2005 Impact Factor 0.834
2004 Impact Factor 0.896
2003 Impact Factor 0.89
2002 Impact Factor 0.779
2001 Impact Factor 0.862
2000 Impact Factor 0.725
1999 Impact Factor 0.911
1998 Impact Factor 0.695
1997 Impact Factor 0.761

Impact factor over time

Impact factor
Year

Additional details

5-year impact 1.29
Cited half-life 8.60
Immediacy index 0.15
Eigenfactor 0.01
Article influence 0.30
Website Separation Science and Technology website
Other titles Separation science and technology (Online), Separation science and technology
ISSN 0149-6395
OCLC 39497122
Material type Document, Periodical, Internet resource
Document type Internet Resource, Computer File, Journal / Magazine / Newspaper

Publisher details

Taylor & Francis

  • Pre-print
    • Author can archive a pre-print version
  • Post-print
    • Author can archive a post-print version
  • Conditions
    • Some individual journals may have policies prohibiting pre-print archiving
    • On author's personal website or departmental website immediately
    • On institutional repository or subject-based repository after either 12 months embargo
    • Publisher's version/PDF cannot be used
    • On a non-profit server
    • Published source must be acknowledged
    • Must link to publisher version
    • Set statements to accompany deposits (see policy)
    • The publisher will deposit in on behalf of authors to a designated institutional repository including PubMed Central, where a deposit agreement exists with the repository
    • STM: Science, Technology and Medicine
    • Publisher last contacted on 25/03/2014
    • This policy is an exception to the default policies of 'Taylor & Francis'
  • Classification
    green

Publications in this journal

  • [Show abstract] [Hide abstract]
    ABSTRACT: Ammonium ion exchange behavior of synthetic zeolites, i.e., sodalite (SOD), rho zeolite (RHO), Linde type A zeolite (LTA), and faujasite zeolite (FAU), was investigated by changing the initial concentration of ammonium ions and reaction time. Ammonium ion exchange behavior was dependent on the open‐window sizes, the pore structures, and the cation exchange capacities of these zeolites. Regarding sodalite with Na ions (Na‐SOD), ammonium ion exchange did not completely occur at the equilibrium state because the open‐window size is smaller than the diameter of ammonium ions. Regarding RHO with Na and Cs ions (NaCs‐RHO), the larger cations, Cs ion, in the cages obstructed the ion exchange at the initial stage. However, the amount of exchanged ammonium ions gradually increased with increasing reaction time, finally achieving equilibrium. Regarding LTA with Na ions (Na‐LTA), the amount of exchanged ammonium ions decreased with increasing reaction time, and then reached plateau. It indicated that both the ion exchange on the α‐cages and physical adsorption on the β‐cages occurred at the initial stage, which was followed by the equilibrium state of ion exchange on the α‐cages. Regarding FAU with Na ions (Na‐FAU), no dependence on reaction time was observed, because the size of the open‐windows is large enough for ion exchange of ammonium ions. The Na‐FAU, which has the biggest open‐windows among these zeolites, showed the highest exchange capacity for ammonium ions, 3.20 mmol/g.
    No preview · Article · Jan 2091 · Separation Science and Technology
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    ABSTRACT: Di(2-ethylhexyl)phosphoric acid (D(2)EHPA) has the tendency to adsorb at interfaces in an oriented fashion due to the amphiphilic structure. The study of the surface tension shows that the adsorption of D(2)EHPA at interface can lower the surface tension of ethanol solution. The amount of adsorption is affected by the pH and ionic strength of the solution. Being a small surface-active molecule, a monolayer of D(2)EHPA molecules can be immobilized on the surface of nonpolar Amberlite XAD-4 resin by a two-step, organic solvent-nonorganic solvent process. The amount of immobilized D(2)EHPA is as high as 1.02 (mol/kg of resin). The electron spectroscopy for chemical analysis (ESCA) results show that the immobilized D(2)EHPA undergoes reorientation by further exposing the phosphoric acid group to the water phase. Since the hydrophobic alkyl chains of D(2)EHPA physically entangle with the surface polymer chains of Amberlite XAD-4, the immobilized extractant has good stability on the resin surface. This D(2)EHPA-modified Amberlite XAD-4 can be used for the separation of lead and copper ions as an ion-exchange resin. Ion-exchange isotherm experiments show that D(2)EHPA-modified resin has higher Pb ion affinity than Cu ion. This new type of D(2)EHPA-modified resin shows better Ph and Cu ions separation than analogous D(2)EHPA-impregnated resin [extractant-impregnated resin (EIR)] and solvent extraction system. The selective separation results using series contacts of solution mixtures with resins further demonstrated the feasibility of using D(2)EHPA-modified Amberlite XAD-4 resin for the separation of Pb/Cu mixed ion solution. After only six batches of contacts, the relative ion concentration of Cri ion increases from 50% to more than 99%, while the relative ion concentration of Pb ion decreases from 50% to less than 1%. The Cu recovery rate is more than 75%, comparing to 54% in the EIR system.
    No preview · Article · Jan 2067 · Separation Science and Technology
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    ABSTRACT: In this study, ion-exchange resins of the cation exchanger universal (KU)-2 type with functional sulfate groups, a carboxyl-containing cation exchanger of a carboxyl containing cationite (KB) type, and polyampholyte amphoteric carboxyl containing ion exchanger (ANKB)-35 were studied for Ni2+ and Cu2+ ion extraction from water solutions. The high value of the ion-exchange capacity of the ionate KU-2 compared with the complex formation amphoteric ion-exchange resin ANKB appeared to be more suitable for use in wastewater treatment. The wet KU-2-20 resin has larger static ion-exchange capacity than other gel resins. This paper presents a technological circuit and installation for local treatment of rinsing water of nickel plating with subsequent metals utilization. It was found that the gradual accumulation of nickel occurs during multiple solution circulations with a low rate.
    No preview · Article · Jan 2031 · Separation Science and Technology
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    ABSTRACT: Unit and integrated pressure-driven membrane processes were investigated in a semi-pilot scale for the purification and concentration of contaminated cleaning solutions. For the tests, liquid acidic and alkaline single-phase detergents tailor-made for CIP systems in the dairy industry were selected.The effect of the permeate recovery rate on the quality of recovered solutions was evaluated.Integrated purification processes provided a very high separation of the milk components with a slight weakening of the detergency properties of the permeate. The least effective integrated treatment option (PM5+AFC30) enabled 100% retention of proteins, and over 98% retention of low molecular weight lactose.
    No preview · Article · Feb 2016 · Separation Science and Technology
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    ABSTRACT: This study investigated the potential use of an agricultural waste, rice husk ash (RHA), for the removal of methyl orange (MO). The adsorbent was prepared via a simple one-pot synthesis of magnetic iron oxide nanoparticles (MIONs). The prepared magnetic nanocomposites (MNCs) were characterized using FTIR, SEM, TEM, XRD, and VSM techniques. Bach adsorption experiments were carried out to evaluate the effects of initial dye concentration, pH, and contact time as well as MIONs content on adsorption capacity. The mechanism of dye adsorption was well fitted to a pseudo-second-order kinetic model. Moreover, the equilibrium data fitted well with the Langmuir isotherm model. DOI: 10.1080/01496395.2016.1142564
    No preview · Article · Feb 2016 · Separation Science and Technology
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    ABSTRACT: Synergistic effect of mixing of extractants (tri-n-butylphosphate, TBP, tri-n-octylamine, TOA, and Aliquat 336, A336) was investigated in view of recovery of pyruvic acid from fermentation media. Extraction experiments were performed at T=302K, from aqueous solution of pyruvic acid (0.025-0.2 kmol m−3) using single and mixed extractants in decanol. Parameters such as distribution coefficient, KD, equilibrium constant, Keq, and extraction efficiency, E% were used to analyze the results. Equilibrium constants, Keq were evaluated to be 15.376 m3·kmol−1, 9.242 m3·kmol−1 and 0.0778 m3·kmol−1 for (TBP+TOA), (A336+TOA) and (TBP+A336), respectively. No overloading (Z<0.5) was observed and only (1:1) complex was proposed. E% were in the order of (TBP+TOA) > (A336+TOA) > (TBP+A336).
    No preview · Article · Feb 2016 · Separation Science and Technology
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    ABSTRACT: The individual and selective extraction of acetophenone and methylbenzylamine with n-heptane without and with 1-octanol has been analyzed at different pH-values, using an extraction system which avoids the reciprocal dispersion of the two phases. For individual extraction, the values of acetophenone mass flow were for 1.6-2.1 times higher than that of methylbenzylamine. The interfacial transfer has been accelerated by adding 1-octanol into the organic phase. The difference between the interfacial mass transfer rates of acetophenone and methylbenzylamine has been amplified during the separation of these compounds from their mixture. In presence of 1-octanol the selectivity factor reached values over 1,000.
    No preview · Article · Feb 2016 · Separation Science and Technology
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    ABSTRACT: A new thiosemicarbazide-modified silica gel sorbent was prepared. The sorbent was quantified by adsorption of mercury ions on silica gel, desorption and then spectrophotometry detection of mercury ions. The retention parameters (sample flow rate, eluent type, sample volume, presence of foreign ions, shaking time, sample flow rate and volume, eluent condition, interfering substances) were investigated. The quantitative recovery (>95%) of Hg(II) ions could be obtained by use of 5 mL of 6 mol L−1 HCl. The adsorption capacity of thiosemicarbazide-modified silica gel was found to be 98.3 mg g–1 at optimum pH. The maximum preconcentration factor was of 400. The technique detection limit was 70 ng L–1, and the relative standard deviation was lower than 4.0% (n=6). The studied sorbent was applied to preconcentrate the trace Hg(II) from the mineralized residues of fish and seawater samples.
    No preview · Article · Feb 2016 · Separation Science and Technology
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    ABSTRACT: This work describes the synthesis and anti-fouling properties of poly(vinylidene fluoride) membrane, grafted with carboxybetaine-based zwitterions. An amphiphilic copolymer, poly(vinylidene fluoride)-graft- poly(N,N-dimethylamino-2-ethylmethacrylate) (PVDF-g-PDMAEMA), was synthesized by radical graft copolymerization, followed by casting the copolymer into a flat membrane, by an immersed phase inversion method. PVDF-g-PDMAEMA membrane was reacted with sodium chloroacetate (SCA) to yield a carboxybetaine-based zwitterionic surface. The membrane showed significantly enhanced hydrophilicity, due to the hydration ability of carboxybetaine-based zwitterions, which inhibited protein adsorption. Compared to pristine PVDF-g-PDMAEMA membrane, carboxybetaine-based zwitterionic membrane exhibited a higher flux recovery in the cyclic filtration.
    No preview · Article · Feb 2016 · Separation Science and Technology
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    ABSTRACT: Experimental study of the performance of a gas centrifuge can be appreciably simplified if instead of isotopic mixtures, a binary mixture of gases with large molecular weight difference is used. The current study undertook this approach by injecting a 53%-47% (w/w)mixture of “Freon12-Freon22” into a gas centrifuge. The two parameters,whose investigation was objective of the current study were:feed flow rate (F), and clearance between tail scoopand the rotor wall (d). The results demonstrated that changing the scoop-wall clearance hasthe most significant effect on the cut (θ), so that by fixing the “d”, “θ” becomes nearly invariant. The head separation factor (α) exhibited the same dependency, but it wasmoreinfluenced by the “F” than the “d”. Apparently the following regression exists between the inspected parameters:Decreasing “d” → Decreasing “θ” → Increasing “α”.Variations of the tail separation factor (β) with “F” or “d” wasquite slight, even though similar to “α”, it was lowered with increasingof the “F”. Separation capacity (δU) as the most significant parameter of acentrifuge was optimized at highest value of “F=40.5 g/h”, andlowest value of “d=3 mm”. The study achieveda separation capacity and an overall separation factorequal to 195.53 kg Freon/y and 16.87, respectively. These valuesareseveraltimes larger than those ofthe isotopic mixtures, demonstrating that application of Freonsisa usefulmean for magnifying the features of a gas centrifuge.
    No preview · Article · Feb 2016 · Separation Science and Technology
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    ABSTRACT: Dipropylmethyl-2-(N,N-diisobutyl)acetamidoammonium iodide has been impregnated on Amberlite XAD-4 resin and investigated for sorption of Ru from nitric acid medium. Equilibrium sorption data for Ru uptake was represented well by the Langmuir isotherm equation (R2 = 0.98) compared to Freundlich isotherm equation (R2 = 0.86). The maximum monolayer coverage (Q0) value of 6.25 mg/g as obtained from Langmuir isotherm was close to experimental value (5.63 mg/g). The heterogeneity parameter (1/n) = 0.37 obtained from the slope of Freundlich isotherm indicates slight heterogeneity in sorption process. Aqueous solutions of 5% Ammonia or 10% sodium hydroxide was found suitable for desorption. The method can be applied for separation of Ru from acidic waste solutions.
    No preview · Article · Feb 2016 · Separation Science and Technology
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    ABSTRACT: Cesium stripping performance of thermally stressed solvent worsens slowly over timein batch tests of the Next-Generation Caustic-Side Solvent Extraction (NG-CSSX) process. NG-CSSX is currentlyused in full-scale equipmentat the Savannah River Site for the selective removal of cesium from high-level salt waste. Recently a new guanidine, N,N’,N”-tris(3,7-dimethyloctyl)guanidine (TiDG), was chosen for use as the suppressor, a lipophilic organic base needed for stripping, and the present study was undertaken to address the question of its stability. The NG-CSSX process solvent was evaluated for a period of threemonths under a variety of temperature and storage conditions. The performance of the solvent was testedat 30-day increments using an extraction, scrub, strip, and extraction (ES2S3E) sequence. The results provide insight on the effects of storage and process conditions, the stripping behavior of TiDG, and the stability of the new solvent composition.
    No preview · Article · Feb 2016 · Separation Science and Technology
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    ABSTRACT: Choline leucineionic liquid solution waschosentosimultaneously extractflavonoidsandpectin from ponkan peels,which were subsequently isolated by thecorresponding K3PO4 based aqueous biphasic systems (ABS).Under optimized conditions of 54% solution for 100 minutes extraction at liquid-solid ratio 17, the predicted yields of flavonoids and pectin achieved1.33% and 13.42%,respectively,the flavonoidsdetermined directly after extraction and the pectinafter ABS purification, with the two corresponding measured yields of 1.26%±0.04% and 12.85%±0.51%.Under optimal extraction, crude flavonoids containedmaximal total flavonoidscontentof about 20%±1% after purification of the ABS involving 25%K3PO4and dilution precipitation.What was directly isolatedfrom K3PO4-rich phasewaspresumed to be a modifiedpectin.
    No preview · Article · Feb 2016 · Separation Science and Technology
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    ABSTRACT: This work aimed to separate proteins and polyphenols from rapeseed stem extracts. Results showed that coagulation with 40 % w/w ethanol and ultra-filtration with the 10 kDa membrane were two efficient methods for polyphenols purification. The purity of polyphenols increased from 80.3 % to 97.0 % after separation. The combination of ethanol coagulation with ultrafiltration permitted decreased the ethanol consumption from 40% w/w to 10 % w/w while maintaining high polyphenols purity. Significant protein loss at room temperature was observed during the stability test, which emphasizes the importance of elaborating a fast and effective separation method for rapeseed stem extracts.
    No preview · Article · Feb 2016 · Separation Science and Technology
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    ABSTRACT: The vacuum pressure swing adsorption (VPSA) method, as an alternative way to separate the CH4/N2 mixture, was adopted to purify methane from coal mine methane. The performance of the VPSA process was investigated experimentally and theoretically with a reactivated carbon molecule sieve as the adsorbent. The computer calculations compared to the experimental data. The concentrated methane with 79% purity could be collected directly during the high-pressure adsorption step with 93% recovery and 0.0720 mL⋅g−1⋅min−1 productivity, when the composition of raw gas was 10/90 vol% CH4/N2, which is of great significance for the utility of low quality energy gas.
    No preview · Article · Feb 2016 · Separation Science and Technology
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    ABSTRACT: Quantitative evaluation of the two-phase separation between N,N–di(2-ethylhexyl)butanamide (DEHBA) and TBP diluted with n–dodecane and uranyl nitrate solution in nitric acid medium was achieved using turbidity measurements. The turbidities of DEHBA were relatively high, particularly at high DEHBA concentrations, while that of TBP rapidly decreased irrespective of nitric acid concentration. A high concentration of DEHBA, nitric acid, and uranium increased the turbidities in the organic phase, which could be ascribed to the increase in viscosity. Distribution ratios of uranium were also measured, and it was indicated that turbidity did not have a critical effect on the distribution ratio when the turbidity was below a certain value.
    No preview · Article · Feb 2016 · Separation Science and Technology
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    ABSTRACT: This study aimed to investigate the contents and the antioxidant activities of various fractions from ethanol extract of the root powder of Panax ginseng C. A. Meyer using supercritical carbon dioxide fractionation technology. Results showed that the DPPH (1,1-diphenyl-2-picrylhydrazyl) radicals scavenging activity was higher in the residue and Fraction 1 compared with that in the extract. Increasing amounts of total phenolic compounds, total polysaccharides, and saponins were strongly correlated with a higher antioxidant capacity. Supercritical carbon dioxide extractive fractionation technology could effectively fractionate the bioactive ingredients from Panax ginseng C. A. Meyer and increase the antioxidant activities of its fractions.
    No preview · Article · Feb 2016 · Separation Science and Technology
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    ABSTRACT: Depth filtration with microporous membranes has been modeled by extending upon previous approaches of Polyakov[1-4][ to incorporate pore size distribution, tortuosity, and cake buildup. The model forecasts were benchmarked against filtration measurements performed with colloidal particles using three very different commercial membrane morphologies with the same nominal average pore size. The critical flux for each membrane was determined by a standard flux-stepping method. Particle retention and permeance were studied under constant flux or transmembrane pressure test conditions. Comparison of the forecast results with data shows reasonable qualitative agreement, but are very sensitive to the measurement uncertainties of the various properties.
    No preview · Article · Feb 2016 · Separation Science and Technology
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    ABSTRACT: Every plant synthesizes phytochemicals with different properties to supply a pool of molecules for food, chemical and pharmaceutical applications. Concurrent with “green technology” development, use of green solvents to extract phytochemicals instead of conventional non-eco-friendlysolvents is crucial. Hydrotropeis a one of the green solvent which enhances solubility of poorly water soluble or hydrophobic compounds in aqueous solutions.This article critically reviews the extraction ofphytochemicals using various hydrotropic solvents.Hydrotropy mechanisms,factors influencing extraction and recovery methods of phytochemicals were also evaluated in this review.
    No preview · Article · Feb 2016 · Separation Science and Technology
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    ABSTRACT: In this study, the phosphorous removal efficiency of partitionable space enhanced coagulation (PEC) technology has been investigated. A series of continuous experiments was conducted to find out the influence of operating parameters. With increase in the elapsed treatment time, the phosphorus removal rates improved progressively during 1.5 hrs to 3 hrs and the reactor reached a steady state after 4 hrs. This improved performance is mainly attributed to the partitionable-space and ‘flocculation filter’ in the PEC reactor which enhanced the coagulation process. The flocs formed exhibited excellent settling characteristics by quickly settling out within the first 15 min.
    No preview · Article · Feb 2016 · Separation Science and Technology