Mineral and chemical compositions and structure-sorption properties of bottom sediments as the basic components of enterosorbents and application materials

The mineral and chemical compositions, as well as some structure-sorption characteristics were determined for clay minerals selected for examination. The integrated coefficients of contamination of bottom sediments with each of the toxicant metals (Fe, Ni, Co, Cu, Zn, Pb, Mn) were calculated. The minerals examined presumably can be used in medicine as efficient application materials, cosmetic agents, and sorbents (enterosorbents).     

Photolysis of 2-dialkylamino-3-methyl-1,4-naphthoquinones

The photolysis of 2-dialkylamino-1,4-naphthoquinones is significantly more efficient when a methyl group is at C³. The quantum yields are 2–6 times greater than for 2-dialkylaminonaphthoquinones lacking a methyl group. 2-Monoalkyl-amino-1,4-naphthoquinones also undergo photochemical dealkylation.Translated from Izvestiya Akademii Nauk SSSR, Seriya Khimicheskaya, No. 10, pp. 2387–2392, October, 1991.     

Catalytic properties of metal-containing oxidized coal catalysts in some redox reactions

An increased activity in some redox reactions was observed for some metal ions bound by ion-exchange to oxidized coals. The similarity of the catalytic properties of oxidized coals modified by Fe(III), Cu(II), Mn(II) and other cations has been established for various redox reactions: decomposition of H₂O₂, oxidation of some organic and inorganic substances by hydrogen peroxide and oxygen. The catalytic activity of the modified coals depends on how the modifying additive is bonded to the surface and the amount of the dopant. New methods for the practical use of catalysts with regulated activity are noted. Translated from Teoreticheskiya i éksperimental’naya Khimiya, Vol. 33, No. 4, pp. 256–260, 1997.     

Sorption properties of composite sorbent and its components,black sea bottom sediment and oxidized carbon from natural raw material

Sorption properties of a new composite sorbent containing Black Sea bottom sediments and oxidized carbon produced from a natural raw material, coconuts were examined. Quantitative characteristics demonstrating the selectivity of sorption of Cu²⁺, Zn²⁺, and Cd²⁺ ions by the synthesized sorbent and its components were obtained. The role played by the sorbent components in the sorption processes under study was elucidated.     

Sorption capture of chlorine with carbon adsorbents from waste gases yielded by electrolysis of chloride solutions

The performance of various carbon materials in sorption capture of chlorine from waste gases yielded by electrolysis of nickel-manganese solutions was studied. A simple method was proposed for regeneration of carbons after sorption of chlorine, which makes them suitable for repeated use in sorption installations for chlorine capture.Translated from Zhurnal Prikladnoi Khimii, Vol. 77, No. 9, 2004, pp. 1462–1466.Original Russian Text Copyright © 2004 by Stavitskaya, Tomashevskaya, Goba, Kartel, Strelko.     

Sorption of organic dyes of various molecular weights on mineral sorbents and on sea and lake bottom sediments

The sorption of organic dyes of various molecular weights (from 100 to 700 amu) from aqueous solutions on minerals and on sea and lake bottom sediments was studied.     

Quantity of sorbed ions and forms of their binding to carbon surface as factors influencing catalytic activity in esterification and hydrolysis reactions

Results are summarized and correlated from studies of how the quantity and nature of sorbed ions and the forms of their binding with the surface of carbon materials (CM) differing in structure and origin will influence the catalytic activity in acid-type reactions. It has been shown that of all of the methods of incorporating metals into the CM surface, the most effective is the ion-exchange modification. It is suggested that the mechanisms of catalysis of protolytic reactions by various ion-exchanged forms of CM are all quite similar. “Sonar” Scientific and Engineering-Technological Center of Biotechnical Systems, National Academy of Sciences of Ukraine, 52/2 Victory Prospect, Kiev 252057, Ukraine. Affiliation of second author: Institute of Sorption and Problems in Endoecology, National Academy of Sciences of Ukraine, 32/34 Academician Palladin Prospect, Kiev-142 252680, Ukraine. Translated from Teoreticheskaya i éksperimental’naya Khimiya, Vol. 33, No. 3, pp. 175–179, May–June, 1997.     

Preparation and Antimicrobial Properties of Chlorinated Carbon Materials

Antimicrobial preparations based on anthracite and carbon fabric and prepared by chlorination were studied as influenced by the moisture content of sorbent, its bulk weight, chlorination temperature, etc.