Characteristics of chabazite modified by hexadecyltrimethylammonium bromide and of its affinity toward chromates

Majdan, Marek; Pikus, S.; Rzączyńska, Z.; Iwan, M.; Maryuk, Oksana; Kwiatkowski, Ryszard; Skrzypek, Henryk

doi:10.1016/j.molstruc.2005.12.043

Cited by 50 publications

(34 citation statements)

References 16 publications

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“…2-and HCrO 4 -ions for the modified bentonite was probably higher than that of CrO 4 2-ions. Similar relationships were obtained for adsorption of Cr(VI) ions on chabazite modified by HDTMA [52]. In this case the equilibrium was established within 120 min (fast kinetics with the first order rate constant k=0.025/min) and the adsorption maximum was a=0.00005 mol/g.…”

Section: Sorption Of Heavy Metals and Phenol On Natural Inorganic Sorsupporting

confidence: 75%

Selected aspect in the separation of inorganic and organic species on ion exchangers and sorbents of various types

Hubicki¹,

Majdan²,

Gęca³

et al. 2011

Annales UMCS, Chemistry

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In the paper the example papers from the Department of Inorganic Chemistry are presented. They are connected with the research of sorption and separation of inorganic and organic species on ion exchangers and sorbents of various types are presented. The main subjects include physicochemical studies of metal ions removal on anion exchangers, chelating and modified ion exchangers as well as zeolites, sorption and separation of rare earth elements, recovery of noble metal particularly from chloride solutions by ion exchange or extraction method, application of the anion exchangers of various types in dyes removal from aqueous solutions and wastewaters and chemistry of porphyrins in the aspect of environmental protection.

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Section: Sorption Of Heavy Metals and Phenol On Natural Inorganic Sorsupporting

confidence: 75%

Selected aspect in the separation of inorganic and organic species on ion exchangers and sorbents of various types

Hubicki¹,

Majdan²,

Gęca³

et al. 2011

Annales UMCS, Chemistry

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“…10, the peaks characteristic of CH 3 (M/Z = 15), NCH 2 (CH 3 ) 2 (M/Z = 58) and CH 3 Br (M/Z = 94), at which surfactant cations form ordered arrangements known as ''trans'' conformers [22,43]. The increase in surfactant concentration also results in a decrease in the number of water molecules in the interlayer space of the mineral; what remains is the weakly adsorbed water on the external surface of the sorbent which causes a shift in the temperature of water release toward lower values.…”

Section: Tg-dsc-qms Analysismentioning

confidence: 99%

A thermal, sorptive and spectral study of HDTMA-bentonite loaded with uranyl phosphate

Sternik

Gładysz–Płaska

Grabias

et al. 2017

J Therm Anal Calorim

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The influence of phosphate ions on the thermal stability of complexes obtained by adsorption of uranium(VI) on organobentonite was determined. Organoclay samples were prepared by the reaction of hexadecyltrimethylammonium bromide with bentonite. The isotherms of sorption/desorption of U(VI) from aqueous solutions containing phosphate ions onto different forms of bentonite were measured using the batch method. The highest amount of uranium was absorbed on HDTMAbentonite in the presence of phosphates. This may have been associated with the complexing of U(VI) ions by phosphate ions, which interacted with surfactant cations probably via electrostatic forces. A TG-DSC-MS study showed that the thermal decomposition of the surfactant sorbed on bentonite proceeded in two stages: at 200-400 and at 600-800°C. The first stage involved defragmentation and oxidation of surfactant cations present in the interior and on the surface of the mineral. The second stage involved oxidation of charcoal and simultaneous dehydroxylation of the sorbent. The oxidation of surfactant cations and the dehydroxylation of the mineral were suppressed in the presence of phosphates.

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“…There are several works where the processes of synthesis of organoclays based on these minerals are described. Thus, Na -chabazite modified with hexadecyltrimethylammonium bromide (GDTMA) showed high indices and proved to be an economic sorbent for elimination of chromates [8]. The authors of [9] synthesized organo-palygorskite and organo-sepiolite, for the modification of which GDTMA was used and the ability of the obtained composites to remove the anionic forms of inorganic compounds was confirmed.…”

Section: Research Of Existing Solutions Of the Problemmentioning

confidence: 99%

“…In [8], the authors used thermal analysis as a supplementary method for studying the structure of organo-chabazite. This allowed to explain the mechanism of GDTMA sorption on the mineral and anions on the modified surface.…”

Section: Research Of Existing Solutions Of the Problemmentioning

confidence: 99%

Study of the structure of organo-modified palygorskite

Zhdanyuk

2017

TAPR

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Characteristics of chabazite modified by hexadecyltrimethylammonium bromide and of its affinity toward chromates

Cited by 50 publications

References 16 publications

Selected aspect in the separation of inorganic and organic species on ion exchangers and sorbents of various types

Selected aspect in the separation of inorganic and organic species on ion exchangers and sorbents of various types

A thermal, sorptive and spectral study of HDTMA-bentonite loaded with uranyl phosphate

Study of the structure of organo-modified palygorskite

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