Preparation of Submicron Chitosan-Alginate Particles and Study of Their Selective Sorption Properties with Respect to Amphiphilic Organic Compounds

The goal of the present work is a comparative study of the effectiveness of the application of intergel systems and molecularly imprinted polymers for the selective sorption and separation of neodymium and scandium ions. The following physico-chemical methods of analysis were used in this study: colorimetry and atomic-emission spectroscopy. The functional polymers of polyacrylic acid (hPAA) and poly-4-vinylpyridine (hP4VP) in the intergel system undergo significant changes in the initial sorption properties. The remote interaction of the polymers in the intergel system hPAA–hP4VP provides mutual activation of these macromolecules, with subsequent transfer into a highly ionized state. The maximum sorption of neodymium and scandium ions is observed at molar ratios of 83%hPAA:17%hP4VP and 50%hPAA:50%hP4VP. Molecularly imprinted polymers MIP(Nd) and MIP(Sc) show good results in the sorption of Nd and Sc ions. Based on both these types of these macromolecular structures, principally new sorption methods have been developed. The method based on the application of the intergel system is cheaper and easier in application, but there is some accompanying sorption (about 10%) of another metal from the model solution during selective sorption and separation. Another method, based on the application of molecularly imprinted polymers, is more expensive and the sorption properties are higher, with the simultaneous sorption of the accompanying metal from the model solution.

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Oil Removal from Water by Selective Sorption on Hydrophobic Cotton Fibers. 1. Study of Sorption Properties and Comparison with Other Cotton Fiber-Based Sorbents

Environmental Science & Technology ◽

10.1021/es020061s ◽

2003 ◽

Vol 37 (5) ◽

pp. 1013-1015 ◽

Cited By ~ 232

Author(s):

Gerald Deschamps ◽

Herve Caruel ◽

Marie-Elisabeth Borredon ◽

Christophe Bonnin ◽

Christian Vignoles

Keyword(s):

Cotton Fiber ◽

Sorption Properties ◽

Cotton Fibers ◽

Oil Removal ◽

Selective Sorption

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Fair Look at Coordination Oligomerization of Higher α-Olefins

Polymers ◽

10.3390/polym12051082 ◽

2020 ◽

Vol 12 (5) ◽

pp. 1082 ◽

Cited By ~ 2

Author(s):

Ilya Nifant’ev ◽

Pavel Ivchenko

Keyword(s):

Transition Metal ◽

Organic Compounds ◽

Acid Catalysis ◽

Wide Spectrum ◽

Distinct Advantage ◽

Reaction Conditions ◽

High Quality ◽

Efficient Alternative ◽

Amphiphilic Organic Compounds ◽

Metallocene Complexes

Coordination catalysis is a highly efficient alternative to more traditional acid catalysis in the oligomerization of α-olefins. The distinct advantage of transition metal-based catalysts is the structural homogeneity of the oligomers. Given the great diversity of the catalysts and option of varying the reaction conditions, a wide spectrum of processes can be implemented. In recent years, both methylenealkanes (vinylidene dimers of α-olefins) and structurally uniform oligomers with the desired degrees of polymerization have become available for later use in the synthesis of amphiphilic organic compounds and polymers, high-quality oils or lubricants, and other prospective materials. In the present review, we discussed the selective dimerization and oligomerization of α-olefins, catalyzed by metallocene and post-metallocene complexes, and explored the prospects for the further applications of the coordination α-olefin dimers and oligomers.

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Structure and Sorption Properties of Silica Chemically Modified with Copper Malonate

Key Engineering Materials ◽

10.4028/www.scientific.net/kem.670.252 ◽

2015 ◽

Vol 670 ◽

pp. 252-257

Author(s):

Evgeniya A. Pakhnutova ◽

Yury G. Slizhov

Keyword(s):

Gas Chromatography ◽

Solid Phase Extraction ◽

Aqueous Solutions ◽

Organic Compounds ◽

Silica Gel ◽

Solid Phase ◽

Sorption Properties ◽

Phase Extraction ◽

Chemically Modified ◽

Structure And Sorption Properties

The sorbent with the grafted layers of malonate copper was obtained on the surface of silica gel Silokhrom S-120 by the method of successive assemblies. Structural, sorption and chromatographic properties of the investigated materials were studied by adsorption of porosimetry, gas chromatography, pH-measurement and Hammett’s method. The sorbent was used for solid phase extraction of organic compounds from aqueous solutions.

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