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Anion exchange resin

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https://www.readbyqxmd.com/read/28528413/dissolved-platinum-concentrations-in-coastal-seawater-boso-to-sanriku-areas-japan
#1
Asami Suzuki Mashio, Hajime Obata, Toshitaka Gamo
Platinum, one of the rarest elements in the earth's crust, is now widely used in a range of products, such as catalytic converters in automobiles and anticancer drugs. Increasing use and dispersal of platinum has the potential to affect aquatic environments. Platinum concentrations in open ocean seawater have been found to be very low (approximately 0.2 pmol/L); however, Pt distributions and biogeochemical cycles in coastal areas are unknown. In this study, we investigated Pt concentrations in coastal waters between the Boso and Sanriku areas, Japan, after the 2011 tsunami...
May 20, 2017: Archives of Environmental Contamination and Toxicology
https://www.readbyqxmd.com/read/28505573/effect-of-inorganic-regenerant-properties-on-pharmaceutical-adsorption-and-desorption-performance-on-polymer-anion-exchange-resin
#2
Shaokui Zheng, Xiaofeng Li, Xueyu Zhang, Wei Wang, Shengliu Yuan
This study investigated the potential effect of four frequently used inorganic regenerant properties (i.e., ionic strength, cation type, anion type, and regeneration solution volume) on the desorption and adsorption performance of 14 pharmaceuticals, belonging to 12 therapeutic classes with different predominant chemical forms and hydrophobicities, using polymeric anion exchange resin (AER)-packed fixed-bed column tests. After preconditioning with NaCl, NaOH, or saline-alkaline (SA) solutions, all resulting mobile counterion types of AERs effectively adsorbed all 14 pharmaceuticals, where the preferential magnitude of OH(-)-type = Cl(-) + OH(-)-type > Cl(-)-type...
May 10, 2017: Chemosphere
https://www.readbyqxmd.com/read/28494246/catalytic-hydrodechlorination-of-triclosan-using-a-new-class-of-anion-exchange-resin-supported-palladium-catalysts
#3
Bing Han, Wen Liu, Jingwen Li, Jin Wang, Dongye Zhao, Rui Xu, Zhang Lin
We prepared a new class of anion-exchange-resin supported Pd catalysts for efficient hydrodechlorination of triclosan in water. The catalysts were prepared through an initial ion-exchange uptake of PdCl4(2-) and subsequent reduction of Pd(II) to Pd(0) nanoparticles at ambient temperature. Two standard strong-base anion exchange resins (IRA-900 and IRA-958) with different matrices (polystyrene and polyacrylic) were chosen as the supports. SEM and TEM images showed that Pd(0) nanoparticles were evenly attached on the resin surface with a mean size of 3-5 nm...
April 26, 2017: Water Research
https://www.readbyqxmd.com/read/28488858/development-of-a-high-throughput-ion-exchange-resin-characterization-workflow
#4
Chun Liu, Daniel Dermody, Keith Harris, Thomas Boomgaard, Jeff Sweeney, Daryl Gisch, Bob Goltz
A novel high-throughout (HTR) ion-exchange (IEX) resin workflow has been developed for characterizing ion exchange equilibrium of commercial and experimental IEX resins against a range of different applications where water environment differs from site to site. Because of its much higher throughput, design of experiment (DOE) methodology can be easily applied for studying the effects of multiple factors on resin performance. Two case studies will be presented to illustrate the efficacy of the combined HTR workflow and DOE method...
May 18, 2017: ACS Combinatorial Science
https://www.readbyqxmd.com/read/28470063/green-synthesis-of-conjugated-linoleic-acids-from-plant-oils-using-a-novel-synergistic-catalytic-system
#5
Yu Zhang, Huaxiang Gu, Hao Shi, Fei Wang, Xun Li
A novel and efficient method has been developed for converting plant oil into a specific conjugated linoleic acid (CLA) using a synergistic biocatalytic system based on immobilized Propionibacterium acnes isomerase (PAI) and Rhizopus oryzae lipase (ROL). PAI exhibited the greatest catalytic activity when immobilized on D301R anion-exchange resin under optimal conditions (PAI dosage: 12,410 U PAI/g D301R; glutaraldehyde concentration: 0.4%; reaction conditions: pH 7.0, 25 °C, 60 min). Up to 109 g/L trans-10, cis 12-CLA was obtained after incubation of 200 g/L sunflower oil with PAI (1659 U/g oil) and ROL (625 mU/g oil) at pH 7...
May 4, 2017: Journal of Agricultural and Food Chemistry
https://www.readbyqxmd.com/read/28458168/a-rapid-method-for-estimation-of-pu-isotopes-in-urine-samples-using-high-volume-centrifuge
#6
Ranjeet Kumar, D D Rao, Rupali Dubla, J R Yadav
The conventional radio-analytical technique used for estimation of Pu-isotopes in urine samples involves anion exchange/TEVA column separation followed by alpha spectrometry. This sequence of analysis consumes nearly 3-4 days for completion. Many a times excreta analysis results are required urgently, particularly under repeat and incidental/emergency situations. Therefore, there is need to reduce the analysis time for the estimation of Pu-isotopes in bioassay samples. This paper gives the details of standardization of a rapid method for estimation of Pu-isotopes in urine samples using multi-purpose centrifuge, TEVA resin followed by alpha spectrometry...
April 20, 2017: Applied Radiation and Isotopes
https://www.readbyqxmd.com/read/28451653/designing-of-blue-green-and-red-cspbx3-perovskite-codoped-flexible-films-with-water-resistant-property-and-elimination-of-anion-exchange-for-tunable-white-light-emission
#7
Jun Hai, Hua Li, Yang Zhao, Fengjuan Chen, Yong Peng, Baodui Wang
We successfully synthesized blue, green, and red CsPbX3 QDs-codoped flexible films using a one-step electrospun strategy, followed by coating a strongly hydrophobic silicone resin on the surface of the films. The codoped flexible light-emitting films are resistant to water, thereby preventing anion exchange and significantly prolonging the lifetime of light emitters under ambient air conditions.
May 14, 2017: Chemical Communications: Chem Comm
https://www.readbyqxmd.com/read/28450173/a-method-for-the-improved-detection-of-aerosolized-influenza-viruses-and-the-male-specific-f-rna-coliphage-ms2
#8
J C Chandler, J W Schaeffer, M Davidson, S L Magzamen, A Pérez-Méndez, S J Reynolds, L D Goodridge, J Volckens, A B Franklin, S A Shriner, B Bisha
The detection of aerosolized viruses can serve as an important surveillance and control tool in agriculture, human health, and environmental settings. Here, we adapted an anion exchange resin-based method, initially developed to concentrate negatively charged viruses from water, to liquid impingement-based bioaerosol sampling. In this method, aerosolized viruses are collected in a 20ml liquid sample contained within widely used impingers, BioSamplers (SKC Inc., Eighty Four, PA), and further concentrated via adsorption to an anion exchange resin that is suspended within this liquid...
April 24, 2017: Journal of Virological Methods
https://www.readbyqxmd.com/read/28427006/regeneration-of-pilot-scale-ion-exchange-columns-for-hexavalent-chromium-removal
#9
Julie A Korak, Richard Huggins, Miguel Arias-Paic
Due to stricter regulations, some drinking water utilities must implement additional treatment processes to meet potable water standards for hexavalent chromium (Cr(VI)), such as the California limit of 10 μg/L. Strong base anion exchange is effective for Cr(VI) removal, but efficient resin regeneration and waste minimization are important for operational, economic and environmental considerations. This study compared multiple regeneration methods on pilot-scale columns on the basis of regeneration efficiency, waste production and salt usage...
July 1, 2017: Water Research
https://www.readbyqxmd.com/read/28417455/an-efficient-process-for-obtaining-of-prebiotic-oligosaccharides-derived-from-lactulose-using-isomerised-and-purified-whey-permeate
#10
Carlos Sabater, Agustín Olano, Marin Prodanov, Antonia Montilla, Nieves Corzo
BACKGROUND: One of the most promising uses of whey permeate (WP) is the synthesis of prebiotic oligosaccharides. Herein, commercial WP was submitted to chemical isomerisation catalysed by sodium borate at an alkaline pH and subsequent purification using anion-exchange resins to remove boron. Afterwards, purified mixtures were used to synthesise prebiotic oligosaccharides using β-galactosidase from Bacillus circulans. RESULTS: Isomerisation of concentrated WP (200 g L(-1) lactose) gave rise to levels of lactulose up to 155...
April 18, 2017: Journal of the Science of Food and Agriculture
https://www.readbyqxmd.com/read/28398709/continuous-desalting-of-refolded-protein-solution-improves-capturing-in-ion-exchange-chromatography-a-seamless-process
#11
Nicole Walch, Alois Jungbauer
Truly continuous biomanufacturing processes enable an uninterrupted feed stream throughout the whole production without the need for holding tanks. We have utilized microporous anion and cation exchangers into which only salts, but not proteins, can penetrate into the pores for desalting of protein solutions, while diafiltration or dilution is usually employed for feed adjustments. Anion exchange and cation exchange chromatography columns were connected in series to remove both anions and cations. To increase operation performance, a continuous process was developed comprised of four columns...
April 11, 2017: Biotechnology Journal
https://www.readbyqxmd.com/read/28391947/adsorption-behavior-of-benzenesulfonic-acid-by-novel-weakly-basic-anion-exchange-resins
#12
Yue Sun, Peng Zuo, Junfen Luo, Rajendra Prasad Singh
Two novel weakly basic anion exchange resins (SZ-1 and SZ-2) were prepared via the reaction of macroporous chloromethylated polystyrene-divinylbenzene (Cl-PS-DVB) beads with dicyclohexylamine and piperidine, respectively. The physicochemical structures of the resulting resins were characterized using Fourier Transform Infrared Spectroscopy and pore size distribution analysis. The adsorption behavior of SZ-1 and SZ-2 for benzenesulfonic acid (BA) was evaluated, and the common commercial weakly basic anion exchanger D301 was also employed for comparison purpose...
April 2017: Journal of Environmental Sciences (China)
https://www.readbyqxmd.com/read/28391925/removal-of-perfluorinated-surfactants-from-wastewater-by-adsorption-and-ion-exchange-influence-of-material-properties-sorption-mechanism-and-modeling
#13
Falk Schuricht, Ekaterina S Borovinskaya, Wladimir Reschetilowski
Perfluorooctane sulfonate (PFOS) has attracted increasing concern in recent years due to its world-wide distribution, persistence, bioaccumulation and potential toxicity. The influence of sorbent properties on the adsorptive elimination of PFOS from wastewater by activated carbons, polymer adsorbents and anion exchange resins was investigated with regard to their isotherms and kinetics. The batch and column tests were combined with physicochemical characterization methods, e.g., N2 physisorption, mercury porosimetry, infrared spectroscopy, differential scanning calorimetry, titrations, as well as modeling...
April 2017: Journal of Environmental Sciences (China)
https://www.readbyqxmd.com/read/28390480/a-simple-and-rapid-method-for-isotopic-analysis-of-nickel-copper-and-zinc-in-seawater-using-chelating-extraction-and-anion-exchange
#14
Shotaro Takano, Masaharu Tanimizu, Takafumi Hirata, Ki-Cheol Shin, Yusuke Fukami, Katsuhiko Suzuki, Yoshiki Sohrin
Stable isotope ratios of nickel, copper, and zinc are powerful tools for elucidating the biogeochemical cycling of trace metals in the ocean. However, analytical difficulties have impeded isotopic studies of these metals. We present a simple and rapid method for simultaneous analysis of Ni, Cu, and Zn isotope ratios in seawater using NOBIAS Chelate-PA1 resin and anion exchange resin. A NOBIAS Chelate-PA1 resin column was used to quantitatively collect Ni, Cu, and Zn from seawater and thoroughly remove the seawater matrix...
May 15, 2017: Analytica Chimica Acta
https://www.readbyqxmd.com/read/28389094/monoclonal-antibody-fragment-removal-mediated-by-mixed-mode-resins
#15
Ellen O'Connor, Matthew Aspelund, Frank Bartnik, Mark Berge, Kelly Coughlin, Mutsa Kambarami, David Spencer, Huiming Yan, William Wang
Efforts to increase monoclonal antibody expression in cell culture can result in the presence of fragmented species requiring removal in downstream processing. Capto adhere, HEA Hypercel, and PPA Hypercel anion exchange/hydrophobic interaction mixed mode resins were evaluated for their fragment removal capabilities and found to separate large hinge IgG1 antibody fragment (LHF) from monomer. Removal of greater than 75% of LHF population occurred at pH 8 and low conductivity. The mechanism of fragment removal was investigated in two series of experiments...
April 4, 2017: Journal of Chromatography. A
https://www.readbyqxmd.com/read/28363158/evaluation-of-the-separation-and-purification-of-227-th-from-its-decay-progeny-by-anion-exchange-and-extraction-chromatography
#16
P I Ivanov, S M Collins, E M van Es, M García-Miranda, S M Jerome, B C Russell
Thorium-227 is currently undergoing evaluation as a potential radionuclide for targeted cancer therapy, and as such a high chemical purity of the material is required. To establish a reliable procedure for radiochemical isolation of (227)Th from the parent (227)Ac and decay progeny, which includes the radiotherapeutic (223)Ra, the performance of three different separation schemes based on ion-exchange and extraction chromatography have been evaluated. The results suggest that both ion exchange and extraction chromatographic techniques can be successfully used for the separation of (227)Th from its decay progeny, however extraction chromatographic resins demonstrate favourable performance in terms of Th recovery and purification from radionuclide impurities...
March 23, 2017: Applied Radiation and Isotopes
https://www.readbyqxmd.com/read/28355586/simultaneous-removal-of-thallium-and-chloride-from-a-highly-saline-industrial-wastewater-using-modified-anion-exchange-resins
#17
Huosheng Li, Yongheng Chen, Jianyou Long, Daqian Jiang, Juan Liu, Sijie Li, Jianying Qi, Ping Zhang, Jin Wang, Jian Gong, Qihang Wu, Diyun Chen
Simultaneous removal of thallium (Tl) and chloride from a highly saline industrial wastewater was investigated using modified anion ion exchange resins. The removal of thallium was mainly driven by the exchange of Tl-chlorocomplex (TlCl4(-)) formed in the oxidation of thallous (Tl (I)) to thallic ion (Tl (III)) by hydrogen peroxide (H2O2) under saline conditions. Over 97% of thallium and chloride removal was achieved using the modified resins, with a wide optimal conditions found to be H2O2 dosage 1.0-25.0mL/L, pH 1...
March 11, 2017: Journal of Hazardous Materials
https://www.readbyqxmd.com/read/28341379/the-rapid-adsorption-microbial-reduction-of-perchlorate-from-aqueous-solution-by-novel-amine-crosslinked-magnetic-biopolymer-resin
#18
Wen Song, Baoyu Gao, Hailan Wang, Xing Xu, Moxi Xue, Minchao Zha, Bo Gong
The aim of this work was to study the adsorption characters of resin, microbial reduction of perchlorate and combined process of perchlorate removal in aqueous solution. Study demonstrated the adsorption equilibrium was achieved in 120min, which based on ion exchange reaction. Dissolved perchlorate (100mg/L) can be completely removed by acclimated anaerobic sludge in 15h, and the concentrated perchlorate (∼200mg/g) on the surface of resin would be effectively microbial reduced after 3days. Neutral environment (pH=7...
March 12, 2017: Bioresource Technology
https://www.readbyqxmd.com/read/28340791/solid-phase-extraction-microfluidic-devices-for-matrix-removal-in-trace-element-assay-of-actinide-materials
#19
Jun Gao, Benjamin T Manard, Alonso Castro, Dennis P Montoya, Ning Xu, Rebecca M Chamberlin
Advances in sample nebulization and injection technology have significantly reduced the volume of solution required for trace impurity analysis in plutonium and uranium materials. Correspondingly, we have designed and tested a novel chip-based microfluidic platform, containing a 100-µL or 20-µL solid-phase microextraction column, packed by centrifugation, which supports nuclear material mass and solution volume reductions of 90% or more compared to standard methods. Quantitative recovery of 28 trace elements in uranium was demonstrated using a UTEVA chromatographic resin column, and trace element recovery from thorium (a surrogate for plutonium) was similarly demonstrated using anion exchange resin AG MP-1...
May 15, 2017: Talanta
https://www.readbyqxmd.com/read/28340785/an-automatic-chemiluminescence-method-based-on-the-multi-pumping-flow-system-coupled-with-the-fluidized-reactor-and-direct-injection-detector-determination-of-uric-acid-in-saliva-samples
#20
Christina Vakh, Stanislawa Koronkiewicz, Slawomir Kalinowski, Leonid Moskvin, Andrey Bulatov
A novel approach for the automatic chemiluminescence (CL) analysis of the complex samples is proposed. A multi-pumping flow system was successfully combined with fluidized reactor and direct-injection CL detector. The possibility of the approach was demonstrated on the determination of uric acid in saliva samples. Uric acid is clinically important analyte and its determination in biological fluids is related to human organism dysfunctions, such as gout. For the first time, the fast luminol - N-bromosuccinimide (NBS) reaction in an alkaline medium was used for the CL determination of uric acid in saliva samples...
May 15, 2017: Talanta
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