Characterization of red mud-epoxy intumescent char using surface imaging and micro analysis

2015 ◽  
Author(s):  
A. I. Arogundade ◽  
P. S. M. Megat-Yusoff ◽  
A. H. Bhat ◽  
A. Faiz
Keyword(s):  
Red Mud ◽  
Surface Imaging ◽  
Micro Analysis

Synthesis and characterization of red mud and rice husk ash-based geopolymer composites

2013 ◽  
Vol 37 ◽  
pp. 108-118 ◽  
Author(s):  
Jian He ◽  
Yuxin Jie ◽  
Jianhong Zhang ◽  
Yuzhen Yu ◽  
Guoping Zhang
Keyword(s):  
Rice Husk ◽  
Red Mud ◽  
Rice Husk Ash ◽  
Synthesis And Characterization ◽  
Geopolymer Composites

Preparation and characterization of porous anorthite ceramics from red mud and fly ash

2019 ◽  
Vol 17 (1) ◽  
pp. 113-121 ◽  
Author(s):  
Weiheng Xiang ◽  
Qingjun Ding ◽  
Gaozhan Zhang
Keyword(s):  
Fly Ash ◽  
Red Mud

scholarly journals Solvo-thermal Assisted-Synthesis; Experimental and Theoretical Characterization; and Biological Evaluations of Azo-Chelator-Ligand Chelates of Fe(II) and Zn(II) ions

2021 ◽  
pp. 40-56
Author(s):  
Festus Chioma
Keyword(s):  
Condensation Reaction ◽  
Test Methods ◽  
Molar Conductance ◽  
Ionization Mass ◽  
Metallic Ions ◽  
Bivalent Ions ◽  
Iron Sulphate ◽  
Methods Analytical ◽  
Micro Analysis

Background and Objectives: The resistance of microbes against anti-bacteriological drugs leading to countless deaths and terminal ailments remains a basis for concern. Hence, the main interest of this study was to design, synthesize and report unusual compounds with basic hydrophilic moieties plus hydrophobic functions for anti-bacteriological studies. Materials and Methods: Analytical (melting points, micro-analysis (C. H.N.S) magnetic susceptibility (µeff), molar conductance plus solubility test) methods; spectral (Fourier Transform Infrared(FTIR)), electrospray ionization mass spectrometry (ESI-MS), nuclear magnetic resonance (1H- plus 13C-NMR), electronic(UV-Vis)) measurements; theoretical (DFT) evaluations were utilized for the characterization of the chelator and its chelates. All synthesized compounds were examined for antimicrobial and antioxidant potentials while the chelator was singly evaluated for solvent extractive capacity. Results: A nitrogenous based chelator-ligand, (E)-1-(((4,6-dimethylpyrimidin-2-yl)imino)methyl) naphthalen-2-ol(LH) synthesized through reflux-condensation reaction of 2-amino-4,6-dimethylpyrimidine with 2-hydroxy-1-napthaldehyde was acquired. Further reflux of the chelator-ligand with bivalent ions of iron-sulphate and zinc-acetate salts plus 2,2’-bipyridine resulted into separate bivalent-heteroleptic metallic chelates. The deprotonated nitrogen of the amine moiety and carbon of the carbonyl gave rise to the chelator-ligand with N2O2 chromophore detected around the metallic atom in the chelates. The µeff data plus UV-Vis spectral values of the chelates conformed to 6-coordinate octahedral geometry. All the chelates were high spin and non-ionic in dimethylsulfoxide (DMSO). The antimicrobial and antioxidant screening of the compounds presented moderate to fantastic results, while the metallic extractive proficiency of the chelator showed outstanding extractability for Fe2+ and Zn2+ions with an efficiency of 79.34% and 51.92% correspondingly. Conclusion: All the synthesized compounds are novel and demonstrated prospective biological, plus metallic ions’ extractive potentials required for designs plus isolation of products also for such actions.

Preparation and characterization of nano–copper oxide supported red-mud catalyst for liquid phase oxidation of ethyl benzene to acetophenone

2021 ◽  
Author(s):  
Subhashree Mishra ◽  
Rajaram Bal ◽  
Simon Watre Sangma ◽  
R. K. Dey
Keyword(s):  
Liquid Phase ◽  
Copper Oxide ◽  
Red Mud ◽  
Supported Catalyst ◽  
Cuo Nanoparticles ◽  
Liquid Phase Oxidation ◽  
Ethyl Benzene ◽  
Phase Oxidation

In this study, liquid phase oxidation of ethyl benzene to acetophenone was widely investigated using a new recyclable supported catalyst of CuO–nanoparticles impregnated over activated red–mud (CuO_AARM). The catalyst was...

Characterization of Cold Sprayed Copper Coatings on Al Alloy Substrate

2015 ◽  
Vol 3 (2) ◽  
pp. 41-53
Author(s):  
Tarun Goyal ◽  
T. S. Sidhu ◽  
R. S. Walia
Keyword(s):  
Spray Deposition ◽  
Structural Characteristics ◽  
Al Alloy ◽  
X Ray Diffraction ◽  
X Ray ◽  
Copper Coatings ◽  
Powder Particles ◽  
Micro Analysis ◽  
Hardness Values

This study reveals the successful low pressure cold spray deposition of near-uniform, defect free and dense copper coatings approximately 700-1900 µm thick, on Al alloy for electro-technical applications. The micro structural characteristics of the deposits have been studied using the combined techniques of X-ray diffraction (XRD), scanning electron microscopy (SEM), and energy dispersive X-ray spectroscopy (EDS) and electron-probe micro analysis (EPMA). The coatings exhibited characteristic splat-like, layered morphologies due to the deposition of solid powder particles which appeared to have been plastically deformed on impact to the substrate. The developed coatings have a dense (in the range of 3090-5015 kg/m3)and nearly uniform microstructure, with almost uniform hardness values in the range of 120 -140 Hv, and electrical conductivity in the range of 23-30 MS/m. EDAX, XRD and EPMA results revealed that the main constituent in the coating is Cu.

Synthesis and characterization of geopolymers derived from coal gangue, fly ash and red mud

2019 ◽  
Vol 206 ◽  
pp. 287-296 ◽  
Author(s):  
Nevin Koshy ◽  
Kunga Dondrob ◽  
Liming Hu ◽  
Qingbo Wen ◽  
Jay N. Meegoda
Keyword(s):  
Fly Ash ◽  
Red Mud ◽  
Coal Gangue ◽  
Synthesis And Characterization

scholarly journals Leaching Characterization of Red Mud.

1991 ◽  
Vol 38 (3) ◽  
pp. 111-120
Author(s):  
Toshihiro KASAI ◽  
Tadato MIZOTA ◽  
Katsuyuki TAKAHASHI
Keyword(s):  
Red Mud

Characterization of a Red Mud and a Clay Body for Ceramic Fabrication

2014 ◽  
Vol 798-799 ◽  
pp. 514-519 ◽  
Author(s):  
Michelle Pereira Babisk ◽  
Thalissa Pizetta Altoé ◽  
Henrique Junio de Oliveira Lopes ◽  
Ulisses Soares do Prado ◽  
Monica Castoldi Borlini Gadioli ◽  
...  
Keyword(s):  
Red Mud ◽  
Mineralogical Composition ◽  
Processing Plants ◽  
Clay Matrix ◽  
Clay Body ◽  
Clay Ceramics ◽  
Red Ceramics ◽  
Ceramic Clay

Red mud is a specific term applied for a residue generated during the processing of aluminum ores, mainly bauxite in the Bayer process, to produce alumina (Al2O3). In several countries where bauxite is mined and processed, distinct red muds are generated in ever growing amounts and becoming an environmental problem. This problem is also affecting the large bauxite processing plants in Brazil and a possible solution for the red mud is its addition to clay ceramics. Before an industrial scale addition is implanted, the specific red mud needs to be characterized for compatible behavior with the ceramic clay matrix. Therefore, the objective of the present work was to characterize a red mud generated in Brazil for an eventual addition to clay ceramic. This was conducted through the determination of density, chemical and mineralogical composition as well as size distribution and microscopic observation of particles. The results indicated that the specific red mud investigated is compatible with clays and has a potential for addition in common red ceramics.

Sign in / Sign up

Export Citation Format

Share Document