Thiocyanate adsorption on ferrihydrite and its fate during ferrihydrite transformation to hematite and goethite

Vu, Hong Phuc; Moreau, John W.

doi:10.1016/j.chemosphere.2014.09.019

Cited by 31 publications

(14 citation statements)

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“…Such transformation has important ecological and environmental implications, as the varying properties of the iron phases influence their biogeochemical reactivity and in turn the mobility and fate of nutrients and contaminants that are associated with the iron phase. For example, recrystallization of ferrihydrite may result in less reactive site density with consequent release of contaminants (Ford et al, 1997;Cornell and Schwertmann, 2003;Vu and Moreau, 2015), but also the possible structural incorporation of associated contaminants into crystalline phases leading to stronger contaminant-iron oxide association (Ford et al, 1997;Cornell and Schwertmann, 2003;Nielsen et al, 2014). Furthermore, in anoxic environments iron oxides serve as terminal electron acceptors for iron-reducing bacteria (FeRB), with ferrihydrite being the most bioavailable iron phase (Roden and Zachara, 1996;Urrutia et al, 1998;Roden et al, 2000;Hansel et al, 2003Hansel et al, , 2004Hansel et al, , 2005.…”

Section: Introductionmentioning

confidence: 97%

A comparison of Fe(III) reduction rates between fresh and aged biogenic iron oxides (BIOS) by Shewanella putrefaciens CN32

2016

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Section: Introductionmentioning

confidence: 97%

A comparison of Fe(III) reduction rates between fresh and aged biogenic iron oxides (BIOS) by Shewanella putrefaciens CN32

2016

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“…Since the Fe 3+ ion is considered a hard acid, the metal coordinates with the SCN − ion through nitrogen to form isothiocyanate complexes (Pearson, 1963). It is well known that goethite is formed when sulphur compounds interact with the Fe 3+ cation (Cornell and Schneider, 1989; Cornell et al ., 1989; Cornell and Schwertmann, 2003; Vu and Moreau, 2015; Carneiro et al ., 2013; Samulewski et al ., 2020). Therefore, this may be an indication that Fe 3+ interacted with the SCN − ion also by sulphur.…”

Section: Resultsmentioning

confidence: 99%

“…The adsorption of SCN − anion onto ferrihydrite occurs in a very acidic pH (Vu and Moreau, 2015) or in a neutral pH in the presence of artificial seawater 4.0 Gy, which contains high Mg 2+ , Ca 2+ and SO 4 2− concentrations (Zaia et al ., 2020). It should be noted that the pH of the oceans 4.0 billion years ago was in the range from 6.3 to 7.2 (Halevy and Bachan, 2017; Krissansen-Totton et al ., 2018).…”

Section: Resultsmentioning

confidence: 99%

“…In prebiotic chemistry experiments for preconcentration of biomolecules, sorption is the most commonly used method (Zaia, 2004; Lambert, 2008). However, sorption of the SCN − anion onto several materials occurred only in very acidic pH (Namasivayam and Sureshkumar, 2007; Wu et al ., 2011; Vu and Moreau, 2015; Wang et al ., 2017). Although a very acidic pH could be found in hydrothermal vents (Holm and Andersson, 2005; Martin et al ., 2008), the pH of seawater of prebiotic Earth was close to neutral (Halevy and Bachan, 2017; Krissansen-Totton et al ., 2018).…”

Section: Relevance Of This Work To Prebiotic Chemistrymentioning

confidence: 99%

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Study of the formation of ferrihydrite under prebiotic chemistry conditions: artificial seawater 4.0 Gy and ammonium thiocyanate

Zaia

Coutinho

Mosca

et al. 2020

International Journal of Astrobiology

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Among the several steps involved in molecular evolution, molecular preconcentration is the first and most important. If the molecules are not preconcentrated the other steps of molecular evolution cannot occur. There are several ways to preconcentrate molecules: sorption, wetting/drying cycles, freezing/sublimation and sorption/precipitation with minerals. In the present work, the effect of NH4SCN and artificial seawater 4.0 Gy on the synthesis of ferrihydrite was studied. It should be noted that thiocyanate could play the same role as that of CN− in the Strecker reaction. Unlike today's seawater that has high Na+ and Cl− concentrations, the seawater used in this work has high Mg2+, Ca2+ and SO42− concentrations. Two results stand out, first SCN− and NH4+ were preconcentrated by sorption/precipitation in some syntheses and second, in some experiments, a mixture of goethite, hematite and magnetite was obtained. The sorption/precipitation of SCN− is always associated with the synthesis of goethite. This could be an indication that SCN− interacts with Fe3+ through the sulphur group of SCN−. In addition, the synthesis of magnetite could be an indication that the SCN− ion oxidized, forming thiocyanogen-(SCN)2 or trithiocyanate ion-(SCN)−3 and that Fe3+ reduced to Fe2+. Besides the sorption/precipitation of SCN− and NH4+, Fourier-transform infrared spectroscopy also showed that sorption/precipitation of SO42− and CO32− occurred. Ferrihydrite synthesized with artificial seawater presented the highest surface area and pore size. The pHpzc values of the samples were in the range of pHpzc described in the literature. The X-ray photoelectron spectroscopy (XPS) measurements performed show proportions of iron present in different oxidation states, however, the electronic similarities observed in the mixtures of iron oxides and oxy-hydroxides make it difficult to quantify them. Direct comparison between XPS spectra of the Fe2p and O 1s core-levels reveal no significant differences from the effect of artificial seawater 4.0 Gy on the synthesis of ferrihydrite.

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“…이러한 특성으로 페리하이드라 이트는 납, 인산염, 비소를 포함한 환경적으로 중요한 화 학종들을 흡착하는데 용이하다 (Antelo et al, 2015;Liu et al, 2016;Mamun et al, 2017 (Schwertmann and Murad, 1983;Schwertmann et al, 2004;Cudennec and Lecerf, 2006 (Schwertmann and Fischer, 1973;Schwertmann and Murad, 1983;Kumpulainen et al, 2007). (Missana et al, 2003;Tang et al, 2010;Li et al, 2011;Jiang et al, 2013;Kim and Kim, 2021 (Pedersen et al, 2006;Wang et al, 2013;Vu and Moreau, 2015 (Fuller et al, 1993;Raven et al, 1998;Jia et al, 2007;Antelo et al, 2015 (Pedersen et al, 2006;Wang et al, 2013;Vu and Moreau, 2015 (Goldberg and Johnston, 2001;Lenoble et al, 2002;Mamindy-Pajany et al, 2009;Jiang et al, 2013;Tokoro et al, 2020…”

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Mineralogical and Geochemical Characteristics of the Precipitates in Acid Mine Drainage of the Heungjin-Taemaek Coal Mine

Shin

Park

Kim

2021

Econ. Environ. Geol.

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Fe(II) released from mining activities is precipitated as various Fe(III)-oxyhydroxides when exposed to an oxidizing environment including mine drainage. Ferrihydrite, one of the representative precipitated Fe(III) minerals, is easy to adsorb heavy metals and other pollutants due to the large specific surface area caused by very low crystallinity. Ferrihydrite is transformed to thermodynamically more stable goethite in the natural environment. Hence, information on the transformation of ferrihydrite to goethite and the related mobility of heavy metals in the acid mine drainage is important to predict the behaviors of those elements during ferrihydrite to goethite transition. The behaviors of heavy metals during the transformation of ferrihydrite to goethite were investigated for core samples collected from an AMD treatment system in the Heungjin-Taemaek coal mine by using X-ray diffraction (XRD), chemical analysis, and statistical analysis. XRD results showed that ferrihydrite gradually transformed to goethite from the top to the bottom of the core samples. Chemical analysis showed that the relative concentration of As was significantly high in the core samples compared with that in the drainage, indicating that As was likely to be adsorbed strongly on or coprecipitated with iron oxyhydroxide. Correlation analysis also indicated that As can be easily removed from mine drainage during iron mineral precipitation due to its high affinity to Fe. The concentration ratio of As, Cd, Co, Ni, and Zn to Fe generally decreased with depth in the core samples, suggesting that mineral transformation can increase those concentrations in the drainage. In contrast, the concentration ratio of Cr to Fe increased with depth, which can be explained by the chemical bond of iron oxide and chromate, and surface charge of ferrihydrite and goethite.

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Thiocyanate adsorption on ferrihydrite and its fate during ferrihydrite transformation to hematite and goethite

Cited by 31 publications

References 37 publications

A comparison of Fe(III) reduction rates between fresh and aged biogenic iron oxides (BIOS) by Shewanella putrefaciens CN32

A comparison of Fe(III) reduction rates between fresh and aged biogenic iron oxides (BIOS) by Shewanella putrefaciens CN32

Study of the formation of ferrihydrite under prebiotic chemistry conditions: artificial seawater 4.0 Gy and ammonium thiocyanate

Mineralogical and Geochemical Characteristics of the Precipitates in Acid Mine Drainage of the Heungjin-Taemaek Coal Mine

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