New network copolymers of 1-vinyl-1,2,4-triazole as efficient sorbents of mercury

Ермакова, Т. Г.; Shaulina, L. P.; Кузнецова, Н. П.; Burova, O. A.; Амосова, С. В.; Myachina, G. F.

doi:10.1134/s1070427208020249

Cited by 4 publications

(3 citation statements)

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“…The triazole heterocycle is a well‐known cationic receptor 14, 34–48. Our materials interact selectively with heavy‐metal cations, allowing them to function as (a) excellent agents for the removal of poisonous Hg 2+ and Pb 2+ from effluent water via solid–liquid extraction and (b) colorimetric sensory materials for the naked‐eye detection and titration of aqueous Fe 3+ .…”

Section: Introductionmentioning

confidence: 99%

Pathways of reductive 2,4‐dinitroanisole (DNAN) biotransformation in sludge

Olivares

Abrell

et al. 2013

Biotech & Bioengineering

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As the use of the insensitive munition compound 2,4-dinitroanisole (DNAN) increases, releases to the environment may pose a threat to local ecosystems. Little is known about the environmental fate of DNAN and the conversions caused by microbial activity. We studied DNAN biotransformation rates in sludge under aerobic, microaerophilic, and anaerobic conditions, detected biotransformation products, and elucidated their chemical structures. The biotransformation of DNAN was most rapid under anaerobic conditions with H2 as a cosubstrate. The results showed that the ortho nitro group in DNAN is regioselectively reduced to yield 2-methoxy-5-nitroaniline (MENA), and then the para nitro group is reduced to give 2,4-diaminoanisole (DAAN). Both MENA and DAAN were identified as important metabolites in all redox conditions. Azo and hydrazine dimer derivatives formed from the coupling of DNAN reduction products in anaerobic conditions. Secondary pathways included acetylation and methylation of amine moieties, as well as the stepwise O-demethylation and dehydroxylation of methoxy groups. Seven unique metabolites were identified which enabled elucidation of biotransformation pathways. The results taken as a whole suggest that reductive biotransformation is an important fate of DNAN leading to the formation of aromatic amines as well as azo and hydrazine dimeric metabolites.

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Section: Introductionmentioning

confidence: 99%

Pathways of reductive 2,4‐dinitroanisole (DNAN) biotransformation in sludge

Olivares

Abrell

et al. 2013

Biotech & Bioengineering

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“…The adsorption capacity of the obtained beads for Cd(II), Hg(II), and Pb(II) in aqueous media was investigated . Finally, very recently, copolymers of VT cross-linked with divinyl sulfide or divinyl diethylene glycol ether were prepared as mercury sorbents, whereas energetic polymer salts were synthesized by protonation of poly(VT) with inorganic or organic salts …”

Section: Introductionmentioning

confidence: 99%

“…The adsorption capacity of the obtained beads for Cd(II), Hg(II), and Pb(II) in aqueous media was investigated. 6 Finally, very recently, copolymers of VT cross-linked with divinyl sulfide or divinyl diethylene glycol ether were prepared as mercury sorbents, 7 whereas energetic polymer salts were synthesized by protonation of poly(VT) with inorganic or organic salts. 8 Emulsion templating is a simple and versatile method for the preparation of microcellular materials (cell size range 2À100 μm) by polymerizing the continuous phase of a high internal phase emulsion (HIPE).…”

Section: ' Introductionmentioning

confidence: 99%

Preparation, Solid-State NMR, and Physicochemical Characterization of Surprisingly Tough Open Cell PolyHIPEs Derived from 1-Vinyl-1,2,4-triazole Oil-in-Water Emulsions

et al. 2011

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Interconnected microcellular polymeric monoliths have been prepared from oil-in-water concentrated emulsions of aqueous 1-vinyl-1,2,4-triazole using the high internal phase emulsion methodology. The polyHIPE materials thus obtained present a typical polyHIPE morphology having unexpectedly high mechanical strengths considering their low cross-linking level (3 mol % of N,N′-methylenebis(acrylamide)). 13C, 15N, and 1H solid-state NMR analyses confirm the expected polymer structure and evidenced the presence of polymer chain association by strong hydrogen bonding with water.

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Acrylic copolymers with pendant 1,2,4‐triazole moieties as colorimetric sensory materials and solid phases for the removal and sensing of cations from aqueous media

Gómez-Valdemoro

Trigo

Ibeas

et al. 2011

J. Polym. Sci. A Polym. Chem.

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Linear water‐soluble polymers and nets with gel‐like behavior were prepared for use as colorimetric sensors and selective extracting agents for naked eye detection and solid–liquid removal of heavy‐metal cations from aqueous environments. Triazole is a well‐known, heavy‐metal cation host. A water‐insoluble methacrylamide containing a 1,2,4‐triazole receptor derivative was copolymerized with highly hydrophilic and water‐soluble methacrylamides to yield a water‐soluble polymer or a cross‐linked network as a powder or a dense membrane. In powder form, the material selectively removed Hg2+, Pb2+, and Ag+ from aqueous media. In the form of swelled dense membranes or films, the material acted as colorimetric sensor for Fe3+. When the membrane was soaked in a yellow aqueous solution of Fe3+, the former colorless, transparent membrane became reddish (but retained its transparency), and the solution became colorless. Aqueous conductivity studies confirmed that both the extraction and the sensing phenomena arose from the interaction of the cations with the triazole moieties. © 2011 Wiley Periodicals, Inc. J Polym Sci Part A: Polym Chem, 2011

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New network copolymers of 1-vinyl-1,2,4-triazole as efficient sorbents of mercury

Cited by 4 publications

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Pathways of reductive 2,4‐dinitroanisole (DNAN) biotransformation in sludge

Pathways of reductive 2,4‐dinitroanisole (DNAN) biotransformation in sludge

Preparation, Solid-State NMR, and Physicochemical Characterization of Surprisingly Tough Open Cell PolyHIPEs Derived from 1-Vinyl-1,2,4-triazole Oil-in-Water Emulsions

Acrylic copolymers with pendant 1,2,4‐triazole moieties as colorimetric sensory materials and solid phases for the removal and sensing of cations from aqueous media

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