Magnetite recovery from copper tailings increases arsenic distribution in solution phase and uptake in native grass

Liu, Yunjia; Huang, Longbin

doi:10.1016/j.jenvman.2016.05.025

Cited by 13 publications

(5 citation statements)

References 40 publications

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“…In China, for every ton of copper mine, approximately 400 tons tailings were dumped. Subsequently, a large amount of copper tailings was stored up, not only encroached on a large number of land resources but also posed serious threats to the environment and also caused serious waste of resources [2]. Especially, for the copper tailings which contained metallic sulfide, it was easy to produce AMD which caused severe environmental pollution [3,4].…”

Section: Introductionmentioning

confidence: 99%

Innovative Methodology for Sulfur Release from Copper Tailings by the Oxidation Roasting Process

Luo

Peng

Sun

2020

Journal of Chemistry

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To effectively prevent the accumulation of copper tailings from producing acid mine drainage (AMD) and maximize the comprehensive utilization of copper tailings, the process of oxidation roasting was adopted to release sulfur in the form of SO2 to achieve the purpose of sulfur recovery later. Based on the AMD risk assessment, thermogravimetric (TG) analysis, and differential scanning calorimeter (DSC) analysis, the influences of roasting temperature, residence time, and air flow in the roasting process were investigated. The thermal stability, reaction equilibrium, mineral transformation, and residual S content were characterized by TG-DSC, HSC chemical software 6.0, X-ray diffraction (XRD), and combustion neutralization, respectively. The optimum conditions for sulfur release in the roasting process were shown with a temperature of 1200°C, a residence time of 60 min, and an air flow of 0.8 L/min. Under these conditions, the sulfur release rate was 99.82%, and the residual S content was 0.05%. Subsequently, the process of sulfur release was proposed as four steps: oxidative decomposition of pyrrhotite, formation of ferric sulfate, decomposition of ferric sulfate, and formation of hematite. All of the findings could propose a theoretical and experimental reference for the recovery of the sulfur component from tailings rich in sulfide minerals.

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Section: Introductionmentioning

confidence: 99%

Innovative Methodology for Sulfur Release from Copper Tailings by the Oxidation Roasting Process

Luo

Peng

Sun

2020

Journal of Chemistry

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“…Aluminosilicates such as albite, clinochlore-1MIIb, anorthite, muscovite-1M and halloysite-10A may raise the pH, subsequently the dissolution of chloride [26]. Secondary Fe minerals can be formed from the reduction and dissolution of Fe(III) in crystalline Fe minerals, i.e., magnesioferrite and magnetite commonly present in the MTs via transformation processes catalyzed by Fe(III)-reducing bacteria [27]. The MTs sample also contained magnesioferrite and magnetite, which are primary sources of ARDP.…”

Section: A Metalliferous Tailings Characterisationmentioning

confidence: 99%

Static Test-Based Acid Rock Drainage Formation Potential of Metalliferous Tailings from O’Kiep, South Africa

2019

SETWM-19, ACBES-19, EEHSS-19 Nov. 18-19, 2019 Johannesburg (South Africa)

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One of the environmental challenges in O'Kiep is the increased levels of potentially toxic elements (PTEs) in metalliferous tailings (MTs), which may result in acid rock drainage (ARD) through oxidation. In this study, laboratory-based static tests were conducted on MTs to predict the risk of acid rock drainage potential (ARDP). Mineralogical analysis of the MTs showed that the MTs consisted mainly of quartz, microline, muscovite, albite, anorthite, magnetite, magnesioferrite, gypsum and halloysite-10A. The major oxides, i.

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“…Consequently, the disposal of mine tailings typically leads to detrimental impacts on ecosystem functioning, manifesting as adverse effects on both plant life and soil microorganisms [1,3]. This is the case with on-land tailing disposal, a practice that not only occupies extensive land areas [4] but also generates negative repercussions for ecosystems due to the following factors: (1) high metal(loid) content, which can negatively affect soil biological activity and its mediated biogeochemical cycling [5]; (2) the presence of fine materials, which can contaminate soil, water, and air, thereby affecting both neighboring regions and human populations [2]; (3) poor physical properties, creating a susceptibility to potential collapses and landslides of deposits, particularly during rainy seasons [6]; (4) the potentially high content of residuals agents, such as sulfides, which can promote acidification processes that increase metal(loid) mobilization and toxicity [2].…”

Section: Introductionmentioning

confidence: 99%

Biochemical, Catabolic, and PGP Activity of Microbial Communities and Bacterial Strains from the Root Zone of Baccharis linearis in a Mediterranean Mine Tailing

Aponte,

Sulbaran-Bracho,

Mondaca

et al. 2023

Microorganisms

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The management of mine tailings (MT) is commonly workload heavy, intrusive, and expensive. Phytostabilization offers a promising approach for MT management; however, it poses challenges due to the unfavorable physicochemical properties of these wastes. Nevertheless, native microorganisms capable of supporting plant growth and development could enhance the efficacy of phytostabilization. This study assesses the biological activity of microbial communities from the root zone of Baccharis linearis, which is naturally present in MT, in order to evaluate their biotechnological potential for phytostabilization. The root zone and bulk samples were collected from B. linearis plants located within a MT in the Mediterranean zone of Chile. Enzyme activities related to the cycling of C, N, and P were assessed. The community-level physiological profile was evaluated using the MicroRespTM system. Bacterial plant growth-promoting (PGP) traits and colony forming units (CFU) were evaluated through qualitative and microbiological methods, respectively. CFU, enzyme activities, and CLPP were higher in the root zone compared with the bulk samples. Five bacterial strains from the root zone exhibited PGP traits such as P solubilization and N acquisition, among others. The presence of microbial communities in the root zone of B. linearis with PGP traits suggests their potential to enhance the ecological management of MT through phytostabilization programs.

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Magnetite recovery from copper tailings increases arsenic distribution in solution phase and uptake in native grass

Cited by 13 publications

References 40 publications

Innovative Methodology for Sulfur Release from Copper Tailings by the Oxidation Roasting Process

Innovative Methodology for Sulfur Release from Copper Tailings by the Oxidation Roasting Process

Static Test-Based Acid Rock Drainage Formation Potential of Metalliferous Tailings from O’Kiep, South Africa

Biochemical, Catabolic, and PGP Activity of Microbial Communities and Bacterial Strains from the Root Zone of Baccharis linearis in a Mediterranean Mine Tailing

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