Goethite - an overview | ScienceDirect Topics
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.
An overview of the role of goethite surfaces in the environment
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 - an overview | ScienceDirect Topics
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 ...
Synthesis, characterization and application of goethite mineral as …
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 ...
The effect of goethite aging on Cd adsorption: Constraints of …
2024年9月5日 · When goethite was pre-aged at pH 7.5 (Fig. 1 a), the amount of Cd adsorbed decreased as the aging time extended. The total Cd load on goethite that was pre-aged for 0 days (Goe-0) was 2.51 ± 0.14 μmol/g, while the total Cd load on goethite that was pre-aged for 30 days (Goe-30) decreased to 1.34 ± 0.11 μmol/g.
Goethite adaptation prompts alterations in antibiotic susceptibility ...
2024年3月15日 · Goethite was synthesized following a previously reported method (Zhu et al., 2020). Briefly, Fe (NO 3 ) 3 solution (5 mL, 1 M) was mixed with KOH (9 mL, 1 M) under stirring. The mixture was then diluted to 100 mL with deionized water and placed in a …
Goethite-enriched biochar mitigates soil emissions of CO2 during ...
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 …
Goethite (α-FeOOH) magnetic transition by ESR, Magnetometry …
2016年4月15日 · The mineral Goethite is an iron oxyhydroxide, whose chemical formula is α-FeOOH. This mineral is one of the most abundant iron compounds in nature and it is part of various types of soils [1], as well as hematite, kaolinite and ferrihydrite [2]. Goethite is also contained in sediments, rock erosion and steel corrosion products.
Surface complexation modeling: Goethite - ScienceDirect
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 ...
Goethite affects phytolith dissolution through clay particle ...
2023年5月15日 · In contrast, PrEf within the goethite-mediated aggregates raised from ∼2% at goethite content of 10–20 g kg −1 up to 20–30% with increasing goethite content. Thus, small amounts of goethite can have a significant effect on the protective action of aggregates on the preservation of phytoliths, hence delaying their dissolution, as noted ...