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Intumescent FRs (IFRs)
Published in Asim Kumar Roy Choudhury, Flame Retardants for Textile Materials, 2020
A series of intumescent flame retardant epoxy resins (IFREPs) were prepared based on EP as a matrix resin, ammonium polyphosphate (APP) and pentaerythritol (PER) as IFRs, and ferrite yellow (goethite), α-FeO(OH) as a smoke suppressant. Goethite, α-FeO(OH), is a commonly available iron oxide mineral. It is also the most common ingredient of iron rust. It was named in 1806 for J.W. von Goethe, a German poet and philosopher with a keen interest in minerals.
Mines: Acidic Drainage Water
Published in Brian D. Fath, Sven E. Jørgensen, Megan Cole, Managing Water Resources and Hydrological Systems, 2020
Wendy B. Gagliano, Jerry M. Bigham
Goethite is a crystalline oxyhydroxide that occurs over a wide pH range, is relatively stable, and may represent a final transformation product of other mine drainage minerals.[8] Ferrihydrite is a poorly crystalline ferric oxide that forms in higher pH (>6.5) environments. Schwertmannite is commonly found in drainage waters with pH ranging from 2.8 to 4.5, and with moderate to high sulfate contents. It may be the dominant phase controlling major and minor element activities in most acid mine drainage. Jarosite group minerals form in more extreme environments with pH < 3, very high sulfate concentrations, and in the presence of appropriate cations like Na and K.
Rock Forming Minerals
Published in Aurèle Parriaux, Geology, 2018
This hydroxide commonly occurs as fibrous or radiating masses because of its perfect cleavage, or in concretionary masses, and also as vertically striated prisms, in tablets or as flakes. It has adamantine-metallic luster (sometimes dull) and a dark brown to black color, a density of 4.37 · 103 kg/m3 and a hardness of 5 to 5.5. Goethite is typically formed by the hydration of iron ores. In sufficient quantity it can be exploited as iron ore. It is the cause of the red and ochre colors of some Mediterranean and equatorial soils.[48,96,151,158,182,184,237,239,244,316]
Decomposition of gaseous chlorobenzene using a DBD combined CuO/α-Fe2O3 catalysis system
Published in Environmental Technology, 2022
Linxuan Xie, Jun Lu, Ganggui Ye, Jieyu Yao, Xuehua Zou, Chengzhu Zhu
Goethite (α-FeOOH, Goe) was a kind of soil mineral with a large specific surface area and high chemical activity, which existed widely in the earth’s crust [24]. Zou et al. [25] found that α-FeOOH could be transformed into α-Fe2O3 by calcination at about 300°C, while α-Fe2O3 exhibited a larger specific surface and had a broad application prospect in the degradation of VOCs [26]. When other metal ions were doped into α-Fe2O3, the catalytic activity could be increased. On the other hand, CuO as a transition metal showed sufficient catalytic activity at low temperature [27], it was widely used in the oxidation of VOCs due to its low cost. Xu et al. [28] reported that non-thermal plasma combined with CuO/AC catalyst improved the benzene removal efficiency clearly. Zeng et al. [29] found Cu-doped MnO2 improved the utilisation of oxygen and ozone for complete oxidation of VOCs. However, few studies were found on the combination of CuO/α-Fe2O3 composite catalyst and DBD to removal VOCs. Thus, it is worth to research the application of CuO/α-Fe2O3/DBD hybrid system as a method of diluting VOCs.
Antibacterial, UV protection, flame retardancy and coloration properties of cotton fabrics coated with polyacrylate polymer containing various iron ores
Published in The Journal of The Textile Institute, 2018
Nurhan Onar Camlibel, Buket Arik, Ozan Avinc, Arzu Yavas
Iron(III) oxides make a pigment called ochre and iron ores are named differently according to the color of the ochre; for instance hematite, limonite, and goethite are known as red, yellow, and brown ochres and are crystalline iron minerals, respectively (Roelofs & Petillion, 2012; Xu, Xu, Li, & Deng, 2017). Among those, Hematite (Fe2O3) is the most known and the most commonly used iron ore. Goethite (α-FeOOH) is the second most common natural ore and generally contains approximately 80 to 90% Fe2O3. Limonite (α-FeOOH.n(H2O)) is one of principal iron ores and commonly composed from the hydration of hematite and magnetite. China, Australia, Brazil, India, and Russia are known to be leading countries in iron ore production (U.S. Geological Survey, 2015). In the case of Turkey, it is estimated that 82.5 million tons of iron ore reserves exist in Turkey (IBP, 2015). Iron ores capture great attention for many different application fields such as magnetic, catalytic, pigments, drug carriers, adsorption, waste water treatment recently due to their high availability, low cost, ease of application, and versatile properties. Moreover investigations regarding their potential usage have recently increased (Abbasi, Ghanbari, Salavati-Niasari, & Hamadanian, 2016; Ahmadi Golsefidi, Abbasi, Abrodi, & Abbasi, 2016; Kirwan, Fawell, & Van Bronswijk, 2003, 2004; Omoike & Chorover, 2006; Parikh & Chorover, 2006).
The Residual Impact of Goethite-Modified Biochar on Cadmium and Arsenic Uptake by Maize in Co-Contaminated Soil
Published in Soil and Sediment Contamination: An International Journal, 2023
Fatma Abdelrhman, Xuewei Wang, Qingling Fu, Hongqing Hu, Linchuan Fang
Goethite (α -FeOOH) is a common mineral in soil that was used in soil and water remediation due to its high reactivity, large surface area, and small pore size (Liu et al. 2019; Zhao, Liu, and Qin 2017; Zhu et al. 2020). However, the goethite nanoparticles tend to agglomerate, limiting their large-scale use (Zhang et al. 2021). An option for overcoming these issues is to load goethite nanoparticles on support materials, such as biochar (Zhang et al. 2021). Previously, goethite-loaded biochar (goethite-modified biochar) was utilized to immobilize heavy metal(loid)s in water and soil (Guo et al. 2016; Irshad et al. 2020, 2020; Yang et al. 2018; Zhang et al. 2021; Zhu et al. 2020). As far as we know, little research has been done on studying the effect of goethite-modified biochar on Cd and As uptake by plants. According to Irshad et al. (2020), applying goethite-modified biochar to co-contaminated paddy soil increased rice production and physiological parameters while decreasing Cd and As concentrations in plant tissues. The residual impact of biochar on heavy metal(loid)s uptake by plants has been examined in previous studies (Hafeez et al. 2019; Rafique et al. 2020; Rizwan et al. 2018, 2018). In addition, the direct/residual impact of iron-based biochar on rice/wheat uptake of Cd and As was examined (Tang et al. 2020). However, according to our knowledge, there is a lack of data about the residual effects of goethite-based biochars on Cd and As accumulation in plants in co-contaminated paddy soil. Furthermore, their impacts on plant growth and photosynthetic activities have not been studied.