Study of arsenopyrite weathering products in mine wastes from abandoned tungsten and tin exploitations

Murciego, Ascensión Murciego; Álvarez‐Ayuso, E.; Pellitero, E.; Rodriguez, M. A.; García-Sánchez, Antonio-Javier; Tamayo, Aitana; Rubio, J.; Rubio, F.; Rubín, Javier

doi:10.1016/j.jhazmat.2010.11.033

Cited by 69 publications

(38 citation statements)

References 46 publications

(59 reference statements)

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“…These activities have caused significant pollution in soils and water, especially with high levels of emission of As, as is the case with the old tungsten mines in Barruecopardo, Salamanca [1][2][3]. The strategic importance of tungsten [4] makes this activity of interest and currently many mines of this commodity are in process of reopening.…”

Section: Introductionmentioning

confidence: 99%

Recycling of tailings from the Barruecopardo tungsten deposit for the production of glass

Alfonso

Castro

Garcı́a-Vallés

et al. 2016

J Therm Anal Calorim

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Section: Introductionmentioning

confidence: 99%

Recycling of tailings from the Barruecopardo tungsten deposit for the production of glass

Alfonso

Castro

Garcı́a-Vallés

et al. 2016

J Therm Anal Calorim

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“…S3b). This finding suggests that arsenopyrite weathering reactions can be influenced by forming an Fe arsenate compound associated to accessible preexisting arsenic in the system, as is evident in the continuous accumulation of total arsenic in mining environments (e.g., Craw et al 2002Craw et al , 2003Murciego et al 2011;Kossoff et al 2012), including calcareous systems (e.g., Aguilar et al 2004;Romero et al 2011;Molinari et al 2014). …”

Section: Influence Of Accessible Arsenic In Arsenopyrite Weathering Rmentioning

confidence: 94%

Arsenopyrite weathering under conditions of simulated calcareous soil

Lara¹,

Velázquez²,

Vazquez‐Arenas³

et al. 2015

Environ Sci Pollut Res

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Mining activities release arsenopyrite into calcareous soils where it undergoes weathering generating toxic compounds. The research evaluates the environmental impacts of these processes under semi-alkaline carbonated conditions. Electrochemical (cyclic voltammetry, chronoamperometry, EIS), spectroscopic (Raman, XPS), and microscopic (SEM, AFM, TEM) techniques are combined along with chemical analyses of leachates collected from simulated arsenopyrite weathering to comprehensively examine the interfacial mechanisms. Early oxidation stages enhance mineral reactivity through the formation of surface sulfur phases (e.g., S n (2-)/S(0)) with semiconductor properties, leading to oscillatory mineral reactivity. Subsequent steps entail the generation of intermediate siderite (FeCO3)-like, followed by the formation of low-compact mass sub-micro ferric oxyhydroxides (α, γ-FeOOH) with adsorbed arsenic (mainly As(III), and lower amounts of As(V)). In addition, weathering reactions can be influenced by accessible arsenic resulting in the formation of a symplesite (Fe3(AsO4)3)-like compound which is dependent on the amount of accessible arsenic in the system. It is proposed that arsenic release occurs via diffusion across secondary α, γ-FeOOH structures during arsenopyrite weathering. We suggest weathering mechanisms of arsenopyrite in calcareous soil and environmental implications based on experimental data.

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“…The genesis of secondary compounds depends on the mineralogy of the original waste materials. Goethite (FeO(OH), ferrihydrite Fe 2 O 3 0.5H 2 O, or amorphous hydrous ferric oxides are precipitated in the presence of excess iron ions (Murciego et al 2011). The formation of scorodite occured according to the following reaction:…”

Section: Secondary Arsenic Minerals Precipitationmentioning

confidence: 99%

Bacterial generation of liquid arsenic waste and the application of water-soluble polymers for arsenic ions separation

Rivas

Sadowski

2014

Rev Environ Sci Biotechnol

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Two aspects of the bio-geo-chemical arsenic cycle in the environment are analysed. The bioleaching and chemical weathering of selected arsenic bearing minerals are presented. The natural bacteria adaption to the higher concentration of arsenic ions is described. The secondary precipitation of minerals containing arsenic was discussed regarding the immobilisation of arsenic ions in soil. Water-soluble polymers are combined with membranes to remove arsenic species under different experimental conditions.

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Study of arsenopyrite weathering products in mine wastes from abandoned tungsten and tin exploitations

Cited by 69 publications

References 46 publications

Recycling of tailings from the Barruecopardo tungsten deposit for the production of glass

Recycling of tailings from the Barruecopardo tungsten deposit for the production of glass

Arsenopyrite weathering under conditions of simulated calcareous soil

Bacterial generation of liquid arsenic waste and the application of water-soluble polymers for arsenic ions separation

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