Evidence of CU- and NI-Bearing Surface Precipitates and Adsorption Complexes In Remediated Soils At the Nanoscale: A Tem, Micro-Raman, and Laser-Ablation ICP-MS Study of Mineral Surface Coatings

Schindler, Michael; Lanteigne, Sonia; McDonald, Andrew M.; Hochella, Michael F.

doi:10.3749/canmin.1500082

Cited by 12 publications

(7 citation statements)

References 88 publications

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“…Mineral surface coatings are common in the upper surface layers of contaminated soils in the Sudbury area [32]. Nickel-bearing spinels such as trevorite (NiFe 2 O 4 ), magnetite and maghemite (max.…”

Section: Discussionmentioning

confidence: 99%

“…1 wt% Ni) occur in different shapes and of different origins in a mineral surface coating of a Fe-rich pyroxene (Fig. 5a–f) [32, 33]. Trevorite forms a linear array of nano-domains at the interface between two zones of the mineral surface coating (Fig.…”

Section: Discussionmentioning

confidence: 99%

“…6e). These mineral assemblages of nano-size crystals of Fe-(hydr)oxides (magnetite, trevorite, maghemite and goethite) and Fe-sulfates (jarosite) occur in amorphous to nano-crystalline matrices composed of silica (around jarosite) or bernalite, Fe(OH) 3 (around the larger magnetite and maghemite crystals) [32, 33].

Fig.…”

Section: Discussionmentioning

confidence: 99%

“…Crystal shapes, textures and locations of the nano-size crystals indicate that the observed spinels (magnetite, trevorite and maghemite) form during low-T abiotic and biotic dissolution of jarosite under microaerophilic conditions [32, 33]. During the latter dissolution processes, released Fe is either directly sequestered into magnetosomes (Fig.…”

Section: Discussionmentioning

confidence: 99%

“…The chemical distribution map for Ni (Fig. 5c) depicts that the element is enriched in magnetite, trevorite and maghemite relative to jarosite and the Fe-rich matrix, indicating the preferential incorporation of the Ni into the former minerals [32, 33].…”

Section: Discussionmentioning

confidence: 99%

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The formation of spinel-group minerals in contaminated soils: the sequestration of metal(loid)s by unexpected incidental nanoparticles

2019

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Mineralogical studies of contaminated soils affected by smelter emission and dust from mining activities indicate that minerals of the spinel group are one of the common hosts of metal-bearing contaminants. Spinel group minerals typically originate from high temperature processes, but an increasing number of studies indicate that metal-bearing spinel group minerals can also form under ambient Earth surface conditions in surficial soils. In this contribution to honor Donald Sparks, we show that the spinels Zn-bearing magnetite (Zn0.5Fe2.5O4) and minium (Pb3O4) form during low temperature alteration of Pb-bearing silica glass in surficial organic rich soils in proximity to a former Cu-smelter in Timmins, Ontario, Canada. The glass most likely formed during high-temperature processes and has been either emitted by the smelter or wind-blown from waste rock piles to near-by soils. The alteration of the glass by percolating pore solutions has resulted in the formation of large micrometer-size dendritic etch features and in nanometer-size dendritic alteration halos composed of nano-size prismatic crystals of Zn-rich magnetite and spherical nanoparticles of minium. Both spinel-type phases are embedded in an amorphous silica matrix which formed during the alteration of the glass at low temperature. A review on the occurrence of spinel-group minerals in smelter-affected soils or mine tailings indicates that the formation of these minerals under ambient Earth surface conditions is quite common and often results in the sequestration of contaminants such as Cu, Ni, Zn and Sb. The pedogenic spinels often occur as euhedral crystals in nano-size mineral assemblages within alteration features such as dendritic etch patterns, mineral surface coatings and mineralized organic matter. Their well-developed crystal forms indicate that (a) they have not formed during a rapid cooling process in a smelter or refinery which typically creates spherical particulate matter, and (b) they have not been part of particulate matter added via fluvial or Aeolian processes which most commonly yield anhedral morphologies. The formation of nano-size spinel-group minerals in low temperature environmental settings may lead to the long-term storage of metal(loid)s in mineral phases and their transport over vast distances via fluvial, alluvial and Aeolian processes.Electronic supplementary materialThe online version of this article (10.1186/s12932-019-0061-3) contains supplementary material, which is available to authorized users.

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Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Fig.…”

Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

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The formation of spinel-group minerals in contaminated soils: the sequestration of metal(loid)s by unexpected incidental nanoparticles

2019

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Metal–Clay Interaction: Spectroscopic Characterization

Gonçalves¹

2019

Encyclopedia of Water

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Spectroscopic techniques are a fundamental complement to experimental studies of metal adsorption on clays or even to characterize metal‐loaded natural samples. The information obtained from these techniques help gain insight on the mechanisms of metal adsorption and binding to clay surfaces, which traditionally rely on surface complexation models. Owing to the uncertainty on parameters, such as number and type of surface sites and types of surface complexes, spectroscopic analysis may be fundamental in constraining such variables and provide more robust, predictable, and reliable models for metal dispersion and transport in the natural environment (contaminated or not). This article surveys the more relevant spectroscopic techniques used for the purpose of probing the nature of metal–clay surface interaction such as Fourier‐transform infrared (FTIR) and Raman spectroscopies, X‐ray photoelectron (XPS) and Auger Electron spectroscopies (AESs), and synchrotron‐based X‐ray absorption spectroscopy (XAS).

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Thermodynamic mixing properties of alunite supergroup minerals: Quantum-mechanical modeling and thermodynamic analysis of sulfate, chromate, selenate, phosphate, and arsenate solid solutions, as well as uranyl incorporation

Kim

Wolf

Becker

2019

Geochimica et Cosmochimica Acta

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Evidence of CU- and NI-Bearing Surface Precipitates and Adsorption Complexes In Remediated Soils At the Nanoscale: A Tem, Micro-Raman, and Laser-Ablation ICP-MS Study of Mineral Surface Coatings

Cited by 12 publications

References 88 publications

The formation of spinel-group minerals in contaminated soils: the sequestration of metal(loid)s by unexpected incidental nanoparticles

The formation of spinel-group minerals in contaminated soils: the sequestration of metal(loid)s by unexpected incidental nanoparticles

Metal–Clay Interaction: Spectroscopic Characterization

Thermodynamic mixing properties of alunite supergroup minerals: Quantum-mechanical modeling and thermodynamic analysis of sulfate, chromate, selenate, phosphate, and arsenate solid solutions, as well as uranyl incorporation

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