Untitled

Gafurova, D. A.; Khakimzhanov, B. Sh.; Mukhamediev, M. G.; Musaev, U. N.

doi:10.1023/a:1015568907375

Cited by 7 publications

(4 citation statements)

References 0 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…[8][9][10][11] Cr 2 O 7 2À ions negatively affect vital organs such as kidneys, liver, and brain. 12 To minimize the risk to the environment and to humans, Cr (VI) should be removed from the wastewater. Currently, the most commonly used methods for removing are ion-exchange, 12,13 adsorption, 12 reduction, 14,15 precipitation, 14 membrane filtration, 7 and biological methods.…”

Section: Introductionmentioning

confidence: 99%

“…12 To minimize the risk to the environment and to humans, Cr (VI) should be removed from the wastewater. Currently, the most commonly used methods for removing are ion-exchange, 12,13 adsorption, 12 reduction, 14,15 precipitation, 14 membrane filtration, 7 and biological methods. 16 Although adsorption 17 and membrane filtration 18 can remove toxic metal ions, they usually suffer from low sorption capacities and selectivities.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Polyvinylсhloride‐based anion exchanger for efficient removal of chromium (VI) from aqueous solutions

Bekchanov

Mukhamediev

Lieberzeit

et al. 2021

Polymers for Advanced Techs

View full text Add to dashboard Cite

Chemical modification of plasticized polyvinylchloride with polyethylenepolyamine leads to anion exchange resin (PPE-1). Different characterization techniques, such as XRD, FTIR, and SEM of PPE-1 anion exchanger revealed weak base amino groups as well as macroporous structure morphology. PPE-1 turned out effective to remove hexavalent chromium ions from aqueous media. Corresponding adsorption kinetics best fit the pseudo-second order model that followed a Freundlich isotherm. In the case of hexavalent chromium ions, the maximum adsorption capacity of PPE-1 was 218.4 mg/g. Thermodynamic data revealed spontaneous endothermic processes and a chemisorption reaction. In addition, results show that the anion exchanger (PPE-1) has 98% for removing hexavalent chromium ions containing from wastewater.

show abstract

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Polyvinylсhloride‐based anion exchanger for efficient removal of chromium (VI) from aqueous solutions

Bekchanov

Mukhamediev

Lieberzeit

et al. 2021

Polymers for Advanced Techs

View full text Add to dashboard Cite

show abstract

“…The ionimpregnated polymer was synthesized in the system 𝐶𝑢 2+ (matrix), 2,2'-bipyridine (ligand) and 4-vinylpyridine (monomer), which forms a coordination complex with the 𝐶𝑢 2+ ion, ethylene glycol dimethacrylate (crosslinking agent) and 2,2'-azobisisobutyronitrile (initiator). The polymer has been successfully used for the determination of copper in a multivitamin tablet, various samples of natural waters and industrial effluents [26,27]. The formation of a complex of a protein with metal ions is used for the sorption of ions from solutions [28].…”

Section: Introductionmentioning

confidence: 99%

Synthesis, Composition and Structure of Complexes of Dialyzed Collagen With CuSO4

Rafikov¹,

Sadikova

Tursunkulov

et al. 2021

Preprint

View full text Add to dashboard Cite

Coordination complexes of collagen with copper (II) sulfate were synthesized at different ratios of the starting materials. For the synthesis, a collagen solution was used, isolated from the skin of cattle, and then freed from electrolytes by dialysis. With an increase in the salt content, the yield of the reaction product increases. The composition and structure of the complex were determined by FT-IR spectroscopy, SEM, X-ray phase analysis, and differential scanning calorimetry. The complex is formed due to the coordination interaction of with the nitrogen and oxygen atom of collagen and water. An inadequate change in the composition of the complexes with a change in the initial ratio of the components was found. With an excess of collagen, some of it does not bind into a complex and precipitates. With an excess of salt, almost all of the collagen is bound into a complex and a rhombic single crystal is formed. The composition of the complex changes not due to a change in the coordination number , but due to an increase in the amount of these ions. An X-ray phase analysis of the starting materials and complexes has been carried out. The correspondence of the parameters of the crystal structure in the X-ray spectra of the complexes was found for a wide ratio of the starting materials. The synthesized complexes have been successfully used for dyeing textile materials.

show abstract

“…Lupinine has various biological activities [2] e.g. it possesses an anticholinesterase activity [3] and is used in medicine for preparing substances with local anesthetic action [4]. Lupinine is a crystal organic base which crystallizes from petroleum ether as rhombic crystals.…”

Section: Introductionmentioning

confidence: 99%

Synthesis and characterization of some derivatives of lupinine and aminolupinine. Collision induced dissociation mass spectrometry studies of protonated molecules

Tlegenov

Pakarinen

Oresmaa

et al. 2007

Journal of Heterocyclic Chem

View full text Add to dashboard Cite

Some ester, amide and thioether derivatives of lupinine, aminolupinine and bromolupinine were synthesized and characterized in order to search biologically active compounds. The protonated molecules were studied by tandem mass spectrometry using collision induced dissociation (CID) technique in order to find out how different structural features and functional groups in different quinolizidine derivatives influence fragmentation behavior. Some theoretical calculations were also made to clarify the conformations of neutral and protonated molecules, to reveal the fragmentation routes and the product ions obtained. The functional groups clearly directed the fragmentations although the typical fragments for lupinine were still observed in all the cases. Theoretical calculations were in agreement with observed fragmentations and greatly helped interpretation of the CID spectra.

show abstract

Untitled

Cited by 7 publications

References 0 publications

Polyvinylсhloride‐based anion exchanger for efficient removal of chromium (VI) from aqueous solutions

Polyvinylсhloride‐based anion exchanger for efficient removal of chromium (VI) from aqueous solutions

Synthesis, Composition and Structure of Complexes of Dialyzed Collagen With CuSO4

Synthesis and characterization of some derivatives of lupinine and aminolupinine. Collision induced dissociation mass spectrometry studies of protonated molecules

Contact Info

Product

Resources

About