Oxidation Of Bentonite
A novel layer-layer crossed structure of bentonite/g-C3N4 …
DOI: 10.1016/J.SURFIN.2021.101365 Corpus ID: 237667953; A novel layer-layer crossed structure of bentonite/g-C3N4 for enhanced photocatalytic oxidation of arsenic(III) in a wide pH range
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Structural Property Improvements of Bentonite with Sulfuric …
Stable structured acid activated bentonite with 2 M was tested in catalytic wet peroxide oxidation (CWPO) of phenol together with raw bentonite. Around 96 % phenol removal was achieved in 135 minutes at reaction temperature of 50 °C while the raw bentonite did not show good results. The data were in agreement with the first order dependency ...
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Role of CuFe2O4 in elemental mercury adsorption and oxidation …
Taking spinel CuFe 2 O 4-modified bentonite as the research object, the experimental and thermodynamic techniques were integrated to study the effect of CuFe 2 O 4 active components on removing Hg 0 in coal gasification process. Meanwhile, the density functional theory was adopted to identify the CuFe 2 O 4 's adsorption and oxidation …
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[PDF] Catalytic oxidation of polymer used in oilfield by bentonite …
DOI: 10.5004/dwt.2021.27379 Corpus ID: 238997671; Catalytic oxidation of polymer used in oilfield by bentonite supported Cu(II) complexes in a wide pH range @article{Ma2021CatalyticOO, title={Catalytic oxidation of polymer used in oilfield by bentonite supported Cu(II) complexes in a wide pH range}, author={Liwa Ma and Yuying Xue and …
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Preparation and 1500 °C oxidation behavior of crack-free bentonite …
DOI: 10.1016/J.CORSCI.2021.109379 Corpus ID: 233652116; Preparation and 1500 °C oxidation behavior of crack-free bentonite doped MoSi2 protective coating on molybdenum @article{Zhu2021PreparationA1, title={Preparation and 1500 °C oxidation behavior of crack-free bentonite doped MoSi2 protective coating on molybdenum}, author={Lu Zhu and Xuanru Ren …
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Thermal activation, characterization and performance …
Bentonite treatment at high temperatures (more than 300 °C) or prolonged time (more than 6 h) showed reduced specific surface area and also reduced sodium removal. ... Structural property improvements of bentonite with sulfuric acid activation and a test in catalytic wet peroxide oxidation of phenol. International Journal of Chemical Reactor ...
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Investigation of Acid-Activated Iron-Based Bentonite …
The chemical oxidation method is mainly through chemical oxidation, photocatalytic oxidation, combustion, and liquid absorption methods that require the use of chemical reagents for oxidation reactions or mutual dissolution and absorption methods for the removal of odors[9]. ... Bentonite itself is generally considered to be non-toxic and ...
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Optimization of bleaching power by sulfuric acid activation of bentonite
Acid activation was carried out by heating muds prepared from Ca-rich bentonite (CaB), sulfuric acid (H 2 SO 4) and distilled water, yielding various bleaching earths (BEs).The roles of each of the process variables, namely mass fraction of H 2 SO 4 (x) in the dried CaB and pure H 2 SO 4 mixture, heating temperature (T) and contact time (t), in the activation were tested.
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Synthesis of Bi2WO6/Na-bentonite composites for photocatalytic
Novel Bi 2 WO 6 /bentonite (denoted as BWO/BENT) composites were prepared via a typical hydrothermal process and employed for the photocatalytic oxidation of arsenic(III) (As(III)).The properties of the prepared samples were characterized through X-ray diffraction, transmission and scanning electron microscopy, UV-visible diffuse reflectance spectroscopy, X …
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Neptunium(V) transport in granitic rock: A laboratory scale …
Bentonite is an important part of engineered barrier systems (EBS) and will be used either as single phase or mixed phase ... In general, strong retention on the clay material has been demonstrated for radionuclides in the tri- and tetravalent oxidation states (Zhao et al., 2008; ...
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Extent of pyrite oxidation by dissolved oxygen in alkaline …
Experiment II was conducted to investigate the effect of bentonite on the oxidation of pyrite. Cleaned pyrite particles (0.2 g) and each of the six alkaline solutions (30 ml) were added to centrifuge tubes (∼50 ml) with and without SB (Table 3). The ratios of SB mass (g) to solution volume (ml) were 0/30, 0.01/30, and 0.1/30.
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High-temperature stability in air of Ti3C2Tx MXene-based …
The top row shows the oxidation of pristine Ti 3 C 2 T x, which is induced by interacting with oxygen molecules, and Ti 3 C 2 T x finally transforms to TiO 2.The bottom row shows the suppressed ...
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(PDF) Insight into the Catalytic Performance of a Zinc-Pillared
The synergetic impact of bentonite and bentonite organo-modified by curcumin extract reflects enhancements in the adsorption as well as the oxidation performance of pillared zinc as a catalyst ...
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Three dimensional electro-Fenton oxidation of diclofenac …
Three dimensional electro-Fenton oxidation of diclofenac and naproxen with magnetic bentonite as a novel particle electrode. Nezamaddin Mengelizadeh a Research Center of Health, ... Magnetic bentonite (MBt) and Ti/TiO2 nanotube/PbO2, for the first time, were investigated as particle electrodes and anode of three dimensional electro-Fenton ...
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Modification of Bentonite with Cationic and Nonionic …
Bentonite, with montmorillonite as the base clay, was modified with hexadecethyltrimethylammonium bromide ... Moreover, the oxidation reaction of the organic material derived from a surfactant usually takes place …
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Investigation of acid-activated iron-based bentonite …
Thus, the iron-based bentonite catalytic oxidation mirrors this established Fenton reagent behavior. In the case of Fenton-like reactions, the stability of the active phase as well as its lifetime is relatively high because the active site is cured at the interface, and thus the Fenton-like reaction can occur efficiently in a neutral ...
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Preparation of Pd (0) and Pd (II) nanotubes and …
The synthesis and application of palladium nanotubes and nanoparticles on modified bentonite was studied. In the first step, an organo-bentonite was prepared by the exchange of the exchangeable Na + cations of a homoionic Na–bentonite by cetyl pyridinium cations (CP–bentonite), especially in the range of low coverage ratios where surfactant ions …
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Effects of iron corrosion products on the degradation of …
Bentonite is a key material for engineering barriers to prevent groundwater and nuclide migration in the multi-barrier system of ... also no unified conclusion about the occurrence oxidation …
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Synthesis of highly active and stable Al/Zr pillared clay as …
Natural bentonite clay was used in the synthesis of single and mixed oxide Al/Zr pillared clay catalysts by means of ultrasonic treatment during the aging and intercalation steps. The raw bentonite and pillared clay catalysts were characterized using high resolution scanning electron microscopy with energy dispersive system (HRSEM-EDS), powder X-ray diffraction …
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Preparation of manganese-impregnated alumina …
synthesis of zirconium-pillared bentonite. The use of both noble metals [25–27] and transition metal oxides [28–30] supported on clays for the CO oxidation reaction has been well documented. In general, noble metals are highly active for the oxidation of CO, whereas they are expensive due to rareness.
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Catalytic activity of phenol oxidation over iron and cooper …
MR refers to bentonite, the values shown in parentheses indicating the molar percentage for the corresponding element in the intercalating solution and metal/MR refers to the interchange between clay and metal solutions before pillaring with polymeric mixed solution. ... The oxidation of phenol by H 2 O 2 in the presence of these materials is ...
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Measurements of the effective diffusion coefficient of …
The oxygen concentration in the bentonite is expected to be controlled by the oxidation of pyrite as an impurity in the bentonite. To investigate this idea, the rates of pyrite oxidation by DO in compacted sodium bentonite were estimated from the experimental data in pyrite-bentonite systems using the obtained effective diffusion coefficient of DO.
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(PDF) Synthesis of Bi 2 WO 6 /Na-bentonite composites for
Novel Bi2WO6/bentonite (denoted as BWO/BENT) composites were prepared via a typical hydrothermal process and employed for the photocatalytic oxidation of arsenic(III) (As(III)).
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Response of NiCrAl-bentonite abradable seal coatings to …
This variation is attributed to the sensitivity of the oxidation rate to temperature. The parabolic oxidation rate of the NiCrAl-bentonite ASCs was 7.9 g·m −2 ·h −1/2 during oxidation at 600 ℃. The oxidation rates of the NiCrFeAl-hBN coatings were 16.5 and 5.5 g·m −2 ·h −1/2 in the fast and slow stages, respectively, at 750 ℃ [7].
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Sn–bentonite-induced Baeyer–Villiger oxidation of 2
The effect of the amount of Sn–bentonite catalyst in the Baeyer–Villiger oxidation of 2-heptylcyclopentanone was studied at 70 C without solvent. The results obtained are summarized in Table 1. Conversion of 2-heptylcyclopentanone was 15 % in the absence of Sn–bentonite and the yield of d-dodecalactone was 9 %.
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Catalytic oxidation of polymer used in oilfield by bentonite …
Download Citation | Catalytic oxidation of polymer used in oilfield by bentonite supported Cu(II) complexes in a wide pH range | Currently, the treatment of organic pollution in oilfield-produced ...
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Sol-gel synthesis of new ZnFe2O4/Na-bentonite composites …
Semantic Scholar extracted view of "Sol-gel synthesis of new ZnFe2O4/Na-bentonite composites for simultaneous oxidation of RhB and reduction of Cr(VI) under visible light irradiation" by Yiqin Guo et al.
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Characterization of Green ZnO Supported Curcumin Intercalated Bentonite
The synergetic impact of bentonite and bentonite organo-modified by curcumin extract reflects enhancements in the adsorption as well as the oxidation performance of pillared zinc as a catalyst ...
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Sol-gel synthesis of new ZnFe2O4/Na-bentonite composites …
To improve the photogenerated charge carrier separation and stability of ZnFe 2 O 4, we prepared new ZnFe 2 O 4 /Na-bentonite composites using Na-bentonite as the carrier via a sol-gel method. The composition, surface morphology and optical properties of samples were characterized by XRD, TEM, XPS, FTIR and UV–vis DRS analysis. The results of TEM and …
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Structural Property Improvements of Bentonite with Sulfuric …
Stable structured acid activated bentonite with 2 M was tested in catalytic wet peroxide oxidation (CWPO) of phenol together with raw bentonite. Around 96 % phenol removal was achieved in …
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