Mechanisms of goethite dissolution in the presence of desferrioxamine B and Suwannee River fulvic acid at pH 6.5

Stewart, Angela G.; Hudson‐Edwards, Karen A.; Dubbin, William E.

doi:10.1016/j.gca.2013.04.006

Cited by 18 publications

(21 citation statements)

References 43 publications

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“…To illustrate, in systems 1 to 4 of the current study, the maximum Fe in solution (Table 1) Stewart et al (2013) for the pure mineral across all their treatments at a reaction time of 336 h. This observation corroborates the work of others (e.g. Dubbin and Ander, 2003;Wolff-Boenisch and Traina, 2007), in which sorbed metals were shown to reduce the rate of siderophore promoted goethite dissolution.…”

Section: Aqueous Fe and Crsupporting

confidence: 89%

“…Only about one-half as much Fe(III) was released from systems 1, 2 and 3, and one-quarter as much Fe(III) was released from system 4, as compared to the pure goethite systems studied by Stewart et al (2013). These striking reductions in solubilised Fe(III) were achieved with a goethite surface coverage of only 3% Cr(III).…”

Section: Effect Of Sorbed Cr(iii) On Fe(iii) Releasementioning

confidence: 92%

“…However, the increase in this surface excess is not proportional to the increase in solubilised Fe(III). To illustrate, if one compares systems 1 and 4 ( chelation by means of a mechanism described by Stewart et al (2013). Second, surficial…”

Section: Synergistic Effect Of Dfob and Srfamentioning

confidence: 99%

“…Suwannee River fulvic acid (SRFA) presence similarly enhances DFOB mediated Fe(III) release from goethite, via a model proposed by Stewart et al (2013). In this model for a system at pH 6.5, SRFA acts primarily by lowering the goethite surface charge and in this way increasing adsorption of HDFOB + .…”

Section: Introductionmentioning

confidence: 99%

“…To facilitate thorough washing of the precipitate and to prevent clogging of the Buchner funnel, the filter paper was replaced after every 250 mL of suspension as described in Stewart et al (2013). The washed precipitate was then allowed to air-dry at 21 °C.…”

Section: Introductionmentioning

confidence: 99%

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Effect of desferrioxamine B and Suwannee River fulvic acid on Fe(III) release and Cr(III) desorption from goethite

Stewart

Hudson‐Edwards

Dubbin

2016

Geochimica et Cosmochimica Acta

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Section: Aqueous Fe and Crsupporting

confidence: 89%

Section: Effect Of Sorbed Cr(iii) On Fe(iii) Releasementioning

confidence: 92%

Section: Synergistic Effect Of Dfob and Srfamentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Effect of desferrioxamine B and Suwannee River fulvic acid on Fe(III) release and Cr(III) desorption from goethite

Stewart

Hudson‐Edwards

Dubbin

2016

Geochimica et Cosmochimica Acta

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Adsorption mechanism of the simulated red mud from diaspore with high levels of silicon and iron

Liu

Wang

et al. 2016

Can J Chem Eng

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The flocculation effect of Hx‐600 on the simulated red mud of the Bayer process from diaspore with high levels of silicon and iron was investigated, and a flocculant with high content of hydroxamate groups (HCPAM) and sodium polyacrylate (PAAS) was chosen as the model compound of Hx‐600. The typical silicon‐containing and iron‐containing monominerals in red mud, hydration grossular and hematite, were correspondingly synthesized, and the adsorption mechanism with HCPAM or PAAS was investigated using FTIR and XPS, respectively. The results reveal physical adsorption of HCPAM or PAAS on the surfaces of hydration grossular and chemisorption of HCPAM or PAAS on the surfaces of hematite. The atomic Mulliken populations of the model compounds of HCPAM and PAAS were calculated by quantum chemical calculation. The results show that a five‐membered ring may be formed on the surfaces of HCPAM‐treated hematite and a four‐membered ring may be formed on the surfaces of PAAS‐treated hematite. A stronger adsorption of the flocculant with hydroxamate groups on the hematite surfaces can be estimated, compared to carboxyl groups. Therefore, the improvement of settling performance achieved by Hx‐600 could be attributed to the high content of hydroxamate groups and high molecular weight (mass) of Hx‐600. A chemisorption with a bridging flocculation between the iron‐containing component in red mud and Hx‐600, and a physical adsorption with a bridging flocculation between the silicon‐containing component in red mud and Hx‐600 can enhance the settling performance of the simulated red mud of the Bayer process from diaspore with high levels of silicon and iron.

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Elucidation of crude siderophore extracts from supernatants of Pseudomonas sp. ZnCd2003 cultivated in nutrient broth supplemented with Zn, Cd, and Zn plus Cd

et al. 2021

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Mechanisms of goethite dissolution in the presence of desferrioxamine B and Suwannee River fulvic acid at pH 6.5

Cited by 18 publications

References 43 publications

Effect of desferrioxamine B and Suwannee River fulvic acid on Fe(III) release and Cr(III) desorption from goethite

Effect of desferrioxamine B and Suwannee River fulvic acid on Fe(III) release and Cr(III) desorption from goethite

Adsorption mechanism of the simulated red mud from diaspore with high levels of silicon and iron

Elucidation of crude siderophore extracts from supernatants of Pseudomonas sp. ZnCd2003 cultivated in nutrient broth supplemented with Zn, Cd, and Zn plus Cd

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