Results 61 to 70 of about 35,935 (220)

Natural South African iron‐rich sand as a functional catalyst in hybrid photocatalytic wet peroxide oxidation technology for the degradation of methyl orange dye pollutant

The Canadian Journal of Chemical Engineering, EarlyView.
This research explored South African iron‐rich sand (SAIRS) as a natural catalyst for light‐mediated wet peroxide oxidation of methyl orange dye in wastewater and at an optimized of conditions of 3500 mg/L catalyst dose, 6 mM H2O2, and pH 2.5, SAIRS achieved 94% methyl orange degradation within 90 min under visible light.
Aaliyah Ebrahim, Stephen Sunday Emmanuel, Alicia Levana Dorling, Shepherd M. Tichapondwa   +3 more
wiley   +1 more source

Mecanismos químicos e mineralógicos de transformação da magnesioferrita de solo derivado de tufito, da região do Alto Paranaíba, MG Chemical and mineralogical mechanisms related to the transformation of magnesioferrite, in a soil forming on tuffite in Alto Paranaíba, MG

Química Nova, 2009
Magnetic soils forming on tuffite of the region of Alto Paranaíba, Minas Gerais, Brazil, usually contain iron-rich spinels exceptionally rich in magnesium and titanium. In this work, samples of the magnetically separated portion from the sand fraction of
Fernando Dias da Silva, Antonio Taranto Goulart, Paulo Rogério da Costa Couceiro, José Domingos Fabris   +3 more
doaj   +1 more source

Phase Separation of Bismuth Ferrite into Magnetite under Voltage Stressing

, 2007
Micro-Raman studies show that under ~700 kV/cm of d.c. voltage stressing for a few seconds, thin-film bismuth ferrite BiFeO3 phase separates into magnetite Fe3O4.
Lin, Y., Lou, X. J., Scott, J. F., Tang, T., Yang, C., Zhang, M.   +5 more
core   +1 more source

Reorientation kinetics of superparamagnetic nanostructured rods [PDF]

, 2008
The attractive interactions between oppositely charged species (colloids, macromolecules etc) dispersed in water are strong, and the direct mixing of solutions containing such species generally yields to a precipitation, or to a phase separation. We have
Berret, J. -F., Fresnais, J., Frka-Petesic, B., Perzynski, R., Sandre, O.   +4 more
core   +2 more sources

Influence of maghemite concentration on magnetic interactions in maghemite/PTT-block-PTMO nanocomposite

Journal of Non-Crystalline Solids, 2008
Abstract Temperature dependence of dc magnetization and ferromagnetic resonance (FMR) of two samples containing γ-Fe 2 O 3 (maghemite) magnetic nanoparticles dispersed at low concentration (0.1 and 0.3 wt%) in a nanocomposite based on a poly(ether–ester) multiblock copolymer (PTT-block-PTMO) matrix was investigated.
Guskos, N., Maryniak, M., Typek, J., Guskos, A., Szymczak, R., Senderek, E., Roslaniec, Z., Petridis, D., Aidinis, K.   +8 more
openaire   +2 more sources

Green and sustainable synthesis of magnetite from copper slag via citrate complexation for methylene blue dye removal from water

The Canadian Journal of Chemical Engineering, EarlyView.
Abstract This study proposes a novel, green, and sustainable method for synthesizing magnetic iron oxides from metallurgical copper slag (CS), leveraging its iron content as a valuable resource. Iron was extracted via acid leaching using edible citric acid (ECA), forming a citrate–iron complex (CSL), which was subsequently thermally decomposed at 300°C
Melisa Portilla‐Sangabriel, Karen Valencia García, Tania‐Ariadna García‐Mejía, Agileo Hernández‐Gordillo, Rosa‐María Ramírez‐Zamora   +4 more
wiley   +1 more source

SiO₂-PVA-Fe(acac)₃ Hybrid Based Superparamagnetic Nanocomposites for Nanomedicine: Morpho-textural Evaluation and In Vitro Cytotoxicity Assay

Molecules, 2020
A facile sol-gel route has been applied to synthesize hybrid silica-PVA-iron oxide nanocomposite materials. A step-by-step calcination (processing temperatures up to 400 °C) was applied in order to oxidize the organics together with the iron ...
Ana-Maria Putz, Cătălin Ianăși, Zoltán Dudás, Dorina Coricovac, Claudia (Farcas) Watz, Adél Len, László Almásy, Liviu Sacarescu, Cristina Dehelean   +8 more
doaj   +1 more source

Ferromagnetic Cobalt Oxide With Structural Distortion and Oxidation State Changes for Hydrogen Sulfide Gas Detection

Small, EarlyView.
High H2S gas sensitivity was improved by electrochemically engineering Co3O4/CoO heterostructures with oxygen vacancies and aligning nanosized particles via magnetic‐field‐assisted deposition. This alignment enhanced gas diffusion and electron transport, reducing base resistance. The resulting sensor exhibited high selectivity and a strong response (Rg/
Shin Joon Kang, Chang Yoon Kim, Min Chan Kim, Sunhyeong Kwon, Joon‐Shik Park, Hyung Mo Jeong   +5 more
wiley   +1 more source

Improved Removal Capacity and Equilibrium Time of Maghemite Nanoparticles Growth in Zeolite Type 5A for Pb(II) Adsorption

Nanomaterials, 2020
Novel magnetic zeolite type 5A nanocomposites were synthesized by the co-precipitation method and applied to lead removal from aqueous ambient. Maghemite nanoparticles were mixed with zeolite and, by controlling its content, transmission electron ...
Juan A. Ramos-Guivar, Katterine Taipe, Miguel Angelo Schettino, Eloi Silva, Marco Antonio Morales Torres, Edson Caetano Passamani, Fred Jochen Litterst   +6 more
doaj   +1 more source

A Sustainable Approach to Industrial Wastewater Treatment Through Aerated‐Assisted Alternating Current–Electrocoagulation Process

Electrochemical Science Advances, Volume 6, Issue 3, June 2026.
ABSTRACT The limitations of traditional direct current–electrocoagulation (DC–EC) in wastewater treatment encompass electrode passivation, high energy consumption and substantial sludge generation. Alternating current–EC, often known as AC–EC, is a technique that was developed to overcome these concerns. This study sets out to compare the effectiveness
Perumal Asaithambi, V. T. Perarasu, Arun Thirumurugan, Madhappan Santhamoorthy, N. M. Hariharan, T. Pandiyarajan, Subramaniapillai Niju, Abhinesh Kumar Prajapati   +7 more
wiley   +1 more source