Kinetics, adsorption and desorption of Cd(II) and Cu(II) on natural allophane: Effect of iron oxide coating

Geoderma ◽  
2018 ◽  
Vol 319 ◽  
pp. 70-79 ◽  
Author(s):  
Jorge Silva-Yumi ◽  
Mauricio Escudey ◽  
Manuel Gacitua ◽  
Carmen Pizarro
Keyword(s):  
Iron Oxide ◽  
Oxide Coating ◽  
Adsorption And Desorption

Adsorption and desorption properties of arsenate onto nano-sized iron-oxide-coated quartz

2010 ◽  
Vol 62 (2) ◽  
pp. 378-386 ◽  
Author(s):  
M. G. Mostafa ◽  
Yen-Hua Chen ◽  
Jiin-Shuh Jean ◽  
Chia-Chuan Liu ◽  
Hsisheng Teng
Keyword(s):  
Iron Oxide ◽  
Treatment Process ◽  
Adsorption And Desorption ◽  
Langmuir Adsorption ◽  
Surface Areas ◽  
Adsorbent Surface ◽  
Desorption Study ◽  
Filtration Properties ◽  
Environmental Sem ◽  
Sorption Characteristics

This study was conducted to investigate the adsorption and desorption properties of arsenate [As(V)] on nano-sized iron-oxide-coated quartz (IOCQ) through batch experiments. The coating of nano-sized iron oxide on the quartz surface was performed using the heat treatment process which aimed to utilize the adsorption properties of the nano-sized iron oxide and the filtration properties of the quartz. Environmental SEM-EDAX and BET techniques were used to analyze the surface morphology, elemental composition, surface area and the porosity of the adsorbent. SEM-EDAX analyses confirmed that arsenate was adsorbed on the IOCQ surface. BET results showed that the IOCQ adsorbent had higher pore volumes and high specific surface areas compared with the pure quartz. The study revealed that the adsorption rate of As(V) ion was very rapid and reached the equilibrium within 5 min. This study also revealed that almost 100% of As(V) removal was achieved within 5 minutes of adsorption reaction from the initial solution containing 1,000 μg-As(V)/L. The Langmuir adsorption isotherm model suitably explained the sorption characteristics of As(V) onto IOCQ. This desorption study showed that the adsorbent could be reused after reacting with mild HCl solution but the concentration of acid eluant or pH has a great impact on the coated adsorbent surface. The results indicate that the nano-sized iron oxide-coated adsorbent is potentially suitable for removal of arsenate from drinking water.

Adsorption and desorption of chromium with humic acid coated iron oxide nanoparticles

2019 ◽  
Vol 26 (29) ◽  
pp. 30044-30054 ◽  
Author(s):  
Shilpa Gnanamuthu Singaraj ◽  
Biswanath Mahanty ◽  
Darshan Balachandran ◽  
Anamika Padmaprabha
Keyword(s):  
Iron Oxide ◽  
Humic Acid ◽  
Iron Oxide Nanoparticles ◽  
Oxide Nanoparticles ◽  
Adsorption And Desorption

scholarly journals Effect of Iron Oxide on the Protective Photochromism of African Padauk

2019 ◽  
Vol 2019 ◽  
pp. 1-8
Author(s):  
Chen Wang ◽  
Ye Qin ◽  
Fang Wang ◽  
Zhiping Wang ◽  
Anmin Huang
Keyword(s):  
Fourier Transform ◽  
Infrared Spectroscopy ◽  
Iron Oxide ◽  
Ultraviolet Radiation ◽  
Ultraviolet Irradiation ◽  
Oxide Coating ◽  
Inhibitory Effect ◽  
Strong Inhibitory Effect ◽  
Wood Surfaces ◽  
Main Factor

African padauk is a tree whose wood is an excellent material for producing decorative items. The wood is susceptible to sunlight exposure and degrades severely, even after short exposures, which leads to discoloration. Ultraviolet irradiation is the main factor that produces discoloration. In this study, chemical changes occurring on the wood surfaces were analyzed by Fourier transform infrared spectroscopy. The discoloration of the African padauk was mainly because of the photodegradation of lignin and extractives by ultraviolet radiation. Additionally, the inhibitory effect of different concentrations of red iron oxide coating was investigated. The results revealed that the chromatismΔE⁎was considerably reduced with the protection of iron oxide. However, the inhibition of the discoloration rate of the specimens covered with a film of red iron oxide increased with values reaching approximately 80%. The red iron oxide coating had a strong inhibitory effect on the discoloration of the African padauk.

Charge properties of red Argentine soils as an indicator of iron oxide/clay associations

Soil Research ◽  
2001 ◽  
Vol 39 (2) ◽  
pp. 423 ◽  
Author(s):  
R. M. Torres Sánchez ◽  
M. Okumura ◽  
R. C. Mercader
Keyword(s):  
Iron Oxide ◽  
Iron Oxides ◽  
Photoelectron Spectroscopy ◽  
Electron Probe ◽  
Surface Coverage ◽  
Oxide Coating ◽  
Point Of Zero Charge ◽  
X Ray Diffraction ◽  
X Ray ◽  
North Eastern

The order of the relative degree of iron oxide coating of 4 samples of red soils from north-eastern Argentina was established using the point of zero charge (PZC), yielded by potentiometric titration, and the isoelectric point (IEP), obtained from the diffusion potential. When PZC is different from IEP, the relative fraction of apparent surface coverage could be assessed from the IEP. The results obtained by the application of X-ray diffraction, scanning electron microscopy, electron probe microanalysis, X-ray photoelectron spectroscopy, Mössbauer spectroscopy, and specif ic surface area, although essential to characterise the samples, did not allow us to determine the degree of iron oxide coating. Our findings show that the order of this degree is opposite to the order of the ratio of the amount of free iron oxides to that of clay in iron oxides/clay mixtures.

Porous iron oxide coating on β″-alumina ceramics for Na-based batteries

2014 ◽  
Vol 262 ◽  
pp. 133-137 ◽  
Author(s):  
Yingying Hu ◽  
Zhaoyin Wen ◽  
Xiangwei Wu
Keyword(s):  
Iron Oxide ◽  
Oxide Coating ◽  
Porous Iron ◽  
Alumina Ceramics

Decolorization of black liquor from bioethanol G2 production using iron oxide coating sands

2017 ◽  
Author(s):  
Vera Barlianti ◽  
Eka Triwahyuni ◽  
Joko Waluyo ◽  
Ajeng Arum Sari
Keyword(s):  
Iron Oxide ◽  
Black Liquor ◽  
Oxide Coating

Iron oxide coating of geosynthetic fibers for water treatment applications

2008 ◽  
Vol 15 (6) ◽  
pp. 471-479 ◽  
Author(s):  
J. Mitchell-Blackwood ◽  
P. L. Gurian ◽  
A. Kumar ◽  
M. Sarich
Keyword(s):  
Iron Oxide ◽  
Water Treatment ◽  
Oxide Coating

Studies on the adsorption and desorption of mitoxantrone to lauric acid/albumin coated iron oxide nanoparticles

2018 ◽  
Vol 161 ◽  
pp. 18-26 ◽  
Author(s):  
Jan Zaloga ◽  
Artem Feoktystov ◽  
Vasil M. Garamus ◽  
Weronika Karawacka ◽  
Alexander Ioffe ◽  
...  
Keyword(s):  
Iron Oxide ◽  
Iron Oxide Nanoparticles ◽  
Lauric Acid ◽  
Oxide Nanoparticles ◽  
Adsorption And Desorption

The laser-assisted iron oxide coating of cast Al auto engines

JOM ◽  
2001 ◽  
Vol 53 (9) ◽  
pp. 44-46 ◽  
Author(s):  
Narendra B. Dahotre ◽  
S. Nayak ◽  
Oludele O. Popoola
Keyword(s):  
Iron Oxide ◽  
Oxide Coating
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