scholarly journals Evaluation with scanning electron microscopy of Cd, Cu, and Zn removal from aqueous solutions by ash from gasification of poultry feathers

2016 ◽  
Vol 12 (1) ◽  
pp. 26-33
Author(s):  
Agata Karło ◽  
Aleksandra Ziembińska-Buczyńska ◽  
Grzegorz Cema ◽  
Joanna Surmacz Górska
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
Aqueous Solutions ◽  
Poultry Feathers ◽  
Cu And Zn ◽  
Scanning Electron

Photocatalytic Decolorization of Methylene Blue by Ferric Stearate, Ferrocene and NiDBC under Sunlight Irradiation

2011 ◽  
Vol 695 ◽  
pp. 133-136
Author(s):  
Zhao Zhao ◽  
Xue Gang Luo ◽  
Xiao Yan Lin
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
Methylene Blue ◽  
Aqueous Solutions ◽  
Diffuse Reflectance ◽  
Diffuse Reflectance Spectroscopy ◽  
Reflectance Spectroscopy ◽  
Sunlight Irradiation ◽  
Photocatalytic Decolorization ◽  
Scanning Electron

In this work, ferric stearate, ferrocene and nickel N,N-dibuty dithiocarbamate (NiDBC) were utilized as photocatalyst for the decolorization of methylene blue (MB) aqueous solutions under sunlight irradiation. Pure MB solution was used as reference. Absorption intensities and surface morphology of these photocatalyst were investigated by Diffuse Reflectance Spectroscopy (DRS) and Scanning Electron Microscopy (SEM).The study indicated that ferric stearate had minimal promotion to the decolorization of MB aqueous solutions; and ferrocene exhibited better photocatalysis ability after had been irradiated 60 hours. In this study, NiDBC showed the best photocatalysis ability from the beginning. Furthermore, NiDBC enhanced the decolorization of MB after been irradiated for 31 hours. And after being irradiated 270 hours, the MB aqueous was completely decolorized by NiDBC.

scholarly journals Adsorption of Organosilanes on the Surface of Aluminium and the Formation of Organosilane Films to Protect It from Corrosion

Materials ◽  
2021 ◽  
Vol 14 (19) ◽  
pp. 5757
Author(s):  
Natalia Gladkikh ◽  
Maxim Petrunin ◽  
Ludmila Maksaeva ◽  
Tatyana Yurasova
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
Infrared Spectroscopy ◽  
Aqueous Solutions ◽  
Structural Features ◽  
Protective Properties ◽  
Adsorption Heats ◽  
Aluminium Exposure ◽  
Corrosion Research ◽  
Scanning Electron

Adsorption of diaminesilane (DAS), vinyltrimethoxysilane (VS) on the surface of thermally precipitated aluminium was examined. The use of different adsorption isotherms made it possible to calculate the adsorption heats for DAS and VS. It was determined that chemisorption of these organosilanes occurred on the surface of aluminium. Exposure of aluminium for 60 min to aqueous solutions of organosilanes led to the formation of organosilane films on the surface of the metal. The use of infrared spectroscopy and scanning electron microscopy in the work made it possible to assess the interactions of organosilanes with the metal surface, as well as to determine the structural features of the films and their thickness. Electrochemical and corrosion research methods made it possible to study the protective properties of organosilane films on aluminium.

Effect of Growth Temperature on the Morphology of ZnO Films Grown in Aqueous Solutions

2012 ◽  
Vol 531-532 ◽  
pp. 388-391
Author(s):  
Qiu Fang Wu ◽  
Si Si Wang ◽  
Feng Lan Yao ◽  
Chun Mei Zhang ◽  
Mi Dan Li
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
Aqueous Solutions ◽  
Growth Temperature ◽  
Hexagonal Lattice ◽  
Zno Films ◽  
X Ray Diffraction ◽  
Mechanism Of Formation ◽  
X Ray ◽  
Scanning Electron

The well-aligned nanoflower and nanorod films were synthesized using zinc acetate- sodium hydroxide aqueous solutions at different growth temperature. These microstructures were characterized with field emission scanning electron microscopy and the X-ray diffraction. The predominant c-axis growth of hexagonal lattice was observed in the ZnO films, and the growth temperature was found to play an important role in controlling the morphology of ZnO films. Mechanism of formation of varying morphologies was discussed.

scholarly journals Scanning electron microscopy and energy dispersive spectrometric microanalysis of crystalline deposits following evaporation of CO3H-, Mg2+ and Ca2+ containing aqueous solutions

Analusis ◽  
2000 ◽  
Vol 28 (9) ◽  
pp. 864-871
Author(s):  
J.-É. Surlève-Bazeille ◽  
M. Mercier ◽  
R. Tarroux ◽  
A. Mavon ◽  
E. Neuzil ◽  
...  
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
Aqueous Solutions ◽  
Energy Dispersive ◽  
Crystalline Deposits ◽  
Scanning Electron

scholarly journals Effect of organic acid concentration in lubricant on tribological characteristics of friction couple

2019 ◽  
Vol 19 (1) ◽  
pp. 24-30
Author(s):  
V. E. Burlakova ◽  
E. G. Drogan
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
Aqueous Solutions ◽  
Friction Factor ◽  
Acid Concentration ◽  
Film Surface ◽  
Friction Couple ◽  
Monocarboxylic Acids ◽  
Lubricant Composition ◽  
Scanning Electron

Introduction.The possibility of using monocarboxylic acids as a lubricant composition additive, and the effect of their concentration in lubricant on the evolution of the friction factor of a brass-steel couple, as well as the morphology of the film surface under friction is considered. The work objective is to study the effect of the concentration of carboxylic acids in the lubricant composition on the evolution of the friction factor of copper – steel alloy.Materials and Methods.Tribological studies of a brass-steel friction couple in aqueous solutions of monocarboxylic acids with the concentrations of 0.025; 0.05; 0.1; 0.2; 0.5 mol/l are carried out. Using scanning electron microscopy, we have studied the morphology of the servovite film surface that is formed on a steel disk after frictional interaction of a brasssteel couple in aqueous solutions of acids with the concentration of 0.1 mol/l.Research Results.Tribological characteristics of the brasssteel tribocoupling in aqueous solutions of carboxylic acids of various concentrations are studied. The optimum acid concentration in the lubricant composition is specified. Herewith, a selective transfer and a wearless friction regime are implemented under friction of the brass 59–steel 40X couple. A decrease in the friction ratio to 0.009 and 0.007 is found out under friction in aqueous solutions of valeric and caproic acids, respectively. The formation of an anti-friction film on the steel surface is identified through the scanning electron microscopy. It is established that the film formed in an aqueous solution of caproic acid has a denser structure in comparison with the film formed under friction in aqueous solutions of butyric and caproic acids.Discussion and Conclusions.Thus, the tribological studies of a brass-steel friction couple in aqueous acid solutions show that the optimum molar acid concentration in the lubricant composition is 0.1 mol/l. At this acid concentration, the values of the friction factor characteristic of the wearless mode are attained.

scholarly journals COMPARISON OF SELF-ORGANIZATION PROCESSES IN AQUEOUS SOLUTIONS OF L-CYSTEINE AND N-ACETYL-L-CYSTEINE WITH SILVER NITRITE

2021 ◽  
pp. 56-68
Author(s):  
Татьяна Викторовна Потапенкова ◽  
Дмитрий Викторович Вишневецкий ◽  
Александра Ивановна Иванова ◽  
Светлана Дмитриевна Хижняк ◽  
Павел Михайлович Пахомов
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
Silver Nanoparticles ◽  
Light Scattering ◽  
Aqueous Solutions ◽  
Uv Spectroscopy ◽  
Self Organization ◽  
Gel Formation ◽  
Silver Solution ◽  
Scanning Electron

С помощью методов УФ спектроскопии, динамического светорассеяния (ДСР) и сканирующей электронной микроскопии (СЭМ) в водных растворах L-цистеина и N-ацетил-L-цистеина (НАЦ) с нитритом серебра (AgNO) при концентрации от 0.001 М до 0.025 М и различных соотношениях исходных компонентов изучены процессы самоорганизации, приводящие к образованию гидрогеля. Установлено, что для растворов на основе L-цистеин и AgNO (цистеин-серебряный раствор - ЦСР) с концентрацией исходных компонентов 0.025 М и выше образуются устойчивые гидрогели, содержащие наночастицы серебра (НЧС). В то же время, в растворах на основе НАЦ и AgNO гели и НЧС не формировались. Определены закономерности и условия, влияющие на процесс образования геля, что позволило предложить механизм гелеобразования в ЦСР. Using the methods of UV spectroscopy, dynamic light scattering (DLS) and scanning electron microscopy (SEM) in aqueous solutions of L-cysteine and N-acetyl-L-cysteine (NAC) add silver nitrite (AgNO) at different concentration from 0.001 to 0.025 M the processes of self-organization leading to the formation of a hydrogel have studied in various ratios of the initial components. It has found that for solutions based on L-cysteine and AgNO (cysteine-silver solution - CSS) with a concentration of initial components of 0.025 M form stable hydrogels containing silver nanoparticles (SNPs). At the same time, solutions based on NAC and AgNO are unable to form gels and SNPs. The regularities and conditions influencing the process of gel formation have been determined, which made it possible to propose a mechanism of gelation in the CSS.

Amino-silica coated magnetic nanoparticles modified with Ni(II)- metalloporphyrin for the selective removal of nitrate ions from water samples

2012 ◽  
Vol 16 (04) ◽  
pp. 390-395 ◽  
Author(s):  
Tahereh Poursaberi ◽  
Mostafa Hassanisadi ◽  
Maryam Shanehsaz
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
Magnetic Nanoparticles ◽  
Aqueous Solutions ◽  
Contact Time ◽  
X Ray Diffraction ◽  
X Ray ◽  
Ft Ir ◽  
Modified Magnetic Nanoparticles ◽  
Scanning Electron

A new magnetic nanoadsorbent was developed by treating Fe3O4 nanoparticles with 3-aminopropyltriethoxysilane and nickel(II) — metalloporphyrin, and applied to remove excessive nitrate from aqueous solutions. Fourier Transform Infrared Spectroscopy (FT-IR), X-ray diffraction (XRD) and Scanning Electron Microscopy (SEM) were used to characterize the synthesized nanoparticles. The effect of pH, contact time, sorbent dosage and some co-existing anions present in aqueous solutions was investigated. Regeneration of nitrate adsorbed material was possible with NaOH , the modified magnetic nanoparticles exhibited good reusability.

Enhancing the sorption efficiency of polystyrene by immobilizing MgO and its application for uranium (VI) removal from aqueous solutions

2016 ◽  
Vol 104 (11) ◽  
Author(s):  
O. A. Elhefnawy ◽  
A. A. Elabd
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
Aqueous Solutions ◽  
Contact Time ◽  
Maximum Adsorption Capacity ◽  
X Ray Diffraction ◽  
X Ray ◽  
Batch Technique ◽  
Effects Of Ph ◽  
Scanning Electron

AbstractMagnesium oxide immobilized polystyrene (PS/MgO) was prepared by the thermal attachment method for the removal of U(VI) from aqueous solutions. PS/MgO was characterized by different techniques [scanning electron microscopy (SEM), energy-dispersive X-ray spectroscopy (EDX), Fourier transform infrared spectroscopy (FTIR) and X-ray diffraction (XRD)]. The effects of pH, adsorbent amount, contact time, initial U(VI) concentration, temperature and co-existing cations on the removal process were investigated by using batch technique. The results showed that the maximum adsorption capacity was 163 (mg g

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