2014年5月1日 · Goethite (α-FeOOH) is a widespread soil mineral and a major component of many ores, sediments and soils and it is one of the most thermodynamically stable iron oxide (Cornell and Schwertmann, 2003). Goethite can be found in both humid and semiarid regions and also appears as the weathering product of various iron-containing rocks (Kemp, 1985).

Goethite and hematite are encountered either in the kaolinite matrix, or as segregations (coating of grains, cement and concretions). Goethite is found where large pores, while hematite forms in micro-pores. As hematite replaces kaolinite, concretions can form and are thus generally made of pure hematite (Herbillon and Nahon, 1988). As a ...

2020年7月17日 · Goethite is the most common of the iron oxyhydroxides and is antiferromagnetic with a disordering (Néel) temperature of about 120°C (Hedley, 1971). Goethite has weak saturation magnetization and very high coercivity (Hedley, 1971; Rochette and Fillion, 1989). It dehydrates to hematite at about 300°C.

2013年9月1日 · BET surface area of goethite was found to be 72 m 2 g −1. BJH adsorption/desorption surface area, and the single point total pore volume of the adsorbent were found to be 12.7/9.64 m 2 g −1 and 0.0287 cm 3 g −1 respectively. These characteristics indicate that goethite is a superior adsorbent for the removal of Cu and Cd from aqueous ...

2006年1月1日 · The surface complexation constants for goethite and hydrous ferric oxide in Table 9, Table 10 show remarkable consistency. This consistency may be seen graphically by plotting the goethite and hydrous ferric oxide surface complexation constants together on the LFER plots presented previously (shown in Ref. 24). The consistency of the surface ...

2025年3月1日 · Goethite (Goe) was chosen as the representative Fe (oxyhydr)oxides due to its stable and well-defined crystal structure, constant chemical composition, high surface reactivity towards As, and widespread distribution in various soil environments [28]. The As(III)-oxidizing bacterium SY8, goethite, HA, and their composites were prepared and ...

2023年11月15日 · Goethite (α-FeOOH) is a widespread soil mineral and one of the most thermodynamically stable iron oxides [32]. Due to its large surface area and particular surface-active sites, goethite has excellent potential as an adsorbent to …

2024年4月20日 · Zn-for-Fe substitution in goethite has been investigated mainly from the crystallization point of view [63], [82], and it has been proposed to promote goethite protonation as a charge compensation mechanism [63], and zinc ferrite precipitation above ∼ 10%at. substitution [82]. However, the effect of Zn-doping on surface charge and its ...

2013年9月20日 · Goethite, α-FeOOH, is widely distributed, occurs in rocks, soils and throughout the global ecosystem, and has the diaspore structure which is based on hexagonal close packing [1]. Generally, goethite is an oxidation, decomposition, weathering and hydrolyzation product of pyrite, siderite, magnetite and Fe-containing silicates [1]. Although ...

2025年2月25日 · Study on the promotion of Fe(II) oxidation by goethite have shown that goethite-adsorbed Fe(II) is usually more reductive than aqueous Fe(II) ions in water, mainly because the electron density given to Fe(II) by the ligand increases the energy of the electron-donating Fe 3d orbitals and thus enhances the electron transfer ability (Huang et al ...