scholarly journals Studies of Polystyrene-Based Ion-Exchange Fiber. IV. A Novel Fiber-Form Material for Adsorption and Immobilization of Biologically-Active Proteins

1986 ◽  
Vol 59 (2) ◽  
pp. 399-403 ◽  
Author(s):  
Toshio Yoshioka ◽  
Masaharu Shimamura
Keyword(s):  
Ion Exchange ◽  
Biologically Active ◽  
Ion Exchange Fiber

scholarly journals ADSORBATIVE SEPARATION OF DOXYCYCLINE FROM AQUEOUS SOLUTION WITH N,N-DIETHYL N-METHYL CHITOSAN, GUM AND POLYACRYLIC ACID BASED HYDROGELS

2021 ◽  
Vol 11 (07) ◽  
pp. 44-53
Author(s):  
Mirvari Hasanova Mirvari Hasanova
Keyword(s):  
Aqueous Solution ◽  
Ion Exchange ◽  
Zeta Potential ◽  
Polyacrylic Acid ◽  
Inorganic Materials ◽  
Biologically Active ◽  
Cross Linking ◽  
Separation And Purification ◽  
Inorganic Substances ◽  
The Cross

The separation and purification of antibiotics with sorption by ion-exchange materials, as well as their delivery in biological processes by immobilization, are now widely used in biotechnology. There are many scientific studies in the literature on the sorption of antibiotics by polymer-based sorbents and inorganic materials, as well as the study of thermodynamics and kinetics of the process. In the literature, the acquisition of biologically active systems from the sorption of antibiotics by ion-exchange fibers based on various polymers and inorganic substances was carried out. However, the synthesis of selective gels for the effective separation of doxycycline and its delivery in different pH mediums by sorption with biodegradable, biocompatible polysaccharide-containing composites is one of the topical issues. Gel was synthesized from the cross-linking of N,N-diethyl N-methyl derivative of a natural polyaminosaccharide of chitosan by glutaric aldehyde. Also, pH-sensitive hydrogels that can swollen in water were synthesized from the cross-linking of a graft copolymer of cherry source gummiarabic with N-vinylpyrrolidone, as well as synthetic polymer polyacrylic acid with N,N-methylene-bis-acrylamide. The structure of the gels were identified by FTIR and NMR spectroscopy, and the sorption of doxycycline antibiotic from an aqueous solution was investigated. According to the values of zeta potential, the protonation of functional groups in the main macromolecule in an acidic medium leads to a value of zeta potential of 40÷80 mV on the surface of chitosan-based gel and others. Although the chemical structure is different, the isoelectric point is set around pH=6÷8 for all three hydrogels. The dependences of the sorption process on the amount of gels, antibiotic concentration, temperature, and pH medium were studied. The experimental data were analyzed using two adsorption models, Langmuir and Freundlich, with the later system providing the best fit. Doxycycline is adsorbed on the surface of chitosan, gummiarabic and polyacrylic acid based hydrogel composite through by physical interactions. Also, the results of thermodynamic parameters ΔG40 kJ/mol show that the nature of the adsorption process is physical, and spontaneous, too. Keywords: Chitosan, Gummiarabic-arabinogalactane, polyacrylic acid, hydrogel, sorption isoterms, doxycycline, thermodynamica.

Biomimetic study of the Ca2+-Mg2+ and K+-Li+ antagonism on biologically active sites: new methodology to study potential dependent ion exchange

2009 ◽  
Vol 22 (1) ◽  
pp. 10-20 ◽  
Author(s):  
Beata Paczosa-Bator ◽  
Milena Stepien ◽  
Magdalena Maj-Zurawska ◽  
Andrzej Lewenstam
Keyword(s):  
Ion Exchange ◽  
Active Sites ◽  
Biologically Active

Obtaining Biologically Active Polypropylene Fibrous Materials

2020 ◽  
Vol 992 ◽  
pp. 764-769
Author(s):  
Sergey Bordunov ◽  
Olga Galtseva ◽  
Inna Plotnikova
Keyword(s):  
Ion Exchange ◽  
Biologically Active ◽  
Polymer Fibers ◽  
Polypropylene Fibers ◽  
Fibrous Materials ◽  
Centrifugal Forces ◽  
Polypropylene Melt ◽  
Die Forming

The paper presents the results of the development of the technology of centrifugal-die forming of biologically active fibrous materials. The modification of biologically active polypropylene fibers was carried out directly at the process of their production in the field of centrifugal forces of rotating reactor during their molding from polypropylene melt. The properties of the obtained ion-exchange and biologically active polymer fibers are studied. It is shown that obtained and modified by the centrifugal-die method polypropylene fibers can be used as biologically active fibers.

Removal of Copper-Cyanide Complexes from Electroplating Industry Effluents by Ion-Exchange Fiber

2012 ◽  
Vol 476-478 ◽  
pp. 1847-1850 ◽  
Author(s):  
Zhan Qiang Cao ◽  
Ming Yu Li ◽  
Yao Ran Sun ◽  
Qing Xuan Zeng
Keyword(s):  
Ion Exchange ◽  
Room Temperature ◽  
Ph Value ◽  
Exchange Process ◽  
Packed Beds ◽  
Copper Cyanide ◽  
Ion Exchange Process ◽  
Cyanide Complexes ◽  
Ion Exchange Fiber ◽  
Industry Effluent

Removal of copper-cyanide complexes from electroplating industry effluent were studied by using an ion-exchange process. A kind of polypropylene strong alkaline anion exchange fiber was used to perform packed beds continuous experiments. The conditions of adsorption were wastewater pH value 9.0 and flow rate 90-120 BV•h-1 at room temperature. The packed beds were exhausted at 1300 bed volumes for copper-cyanide complexes The elution of copper-cyanide complexes from ion-exchange fiber was studied. The results showed that copper-cyanide complexes were easily eluted from ion exchange fiber using either 2.0 mol•L-1 NaNO3 or NaCl. With 1.0 mol•L-1 NaNO3 solution at 30 BV•h-1, the regenerating rate of copper-cyanide complexes was more than 95%.

Removal of arsenic in water by an ion-exchange fiber with amino groups

2008 ◽  
Vol 110 (6) ◽  
pp. 3934-3940 ◽  
Author(s):  
Xiaozhuan Zhang ◽  
Kai Jiang ◽  
Zhenbang Tian ◽  
Weiqing Huang ◽  
Liang Zhao
Keyword(s):  
Ion Exchange ◽  
Amino Groups ◽  
Ion Exchange Fiber ◽  
Removal Of Arsenic
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