Constructed wetlands for the treatment of bauxite residue leachate: Long term field evidence and implications for management

O’Connor, Gerard M.; Courtney, Ronan

doi:10.1016/j.ecoleng.2020.106076

Cited by 11 publications

(3 citation statements)

References 39 publications

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“…Subsequent work confirmed that calcite and dawsonite (NaAlCO 3 [OH]0 2 ) were precipitated via carbonation in the presence and absence of Ca respectively (Higgins et al, 2018). After 4 years this constructed wetland was still effective, and the effluent did not cause observable ecotoxicological effects (O'Connor & Courtney, 2020).…”

Section: Field and Laboratory Studies Of Bauxite Waste Remediationmentioning

confidence: 93%

The Microbiology of Metal Mine Waste: Bioremediation Applications and Implications for Planetary Health

Newsome

Falagán

2021

GeoHealth

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Microbes colonise and inhabit mine wastes, they tolerate high concentrations of metals and contribute to soil functioning and plant growth  Microbes transform metal speciation and environmental mobility, through metabolism, biogeochemical cycling and metal resistance mechanisms  Beneficial microbial activity can be stimulated to remediate metal-containing mine wastes, but more long-term field studies are required

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Section: Field and Laboratory Studies Of Bauxite Waste Remediationmentioning

confidence: 93%

The Microbiology of Metal Mine Waste: Bioremediation Applications and Implications for Planetary Health

Newsome

Falagán

2021

GeoHealth

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“…The biological concentration factor (BCF) and biological transfer factor (BTF) indexes were calculated as follows [34, 35]: (1) BCF = heavy metal content in plants heavy metal content in soils × 100 % , (2) BTF = heavy metal content in overground parts heavy metal content in root × 100 % . …”

Section: Methodsmentioning

confidence: 99%

The Absorption and Distribution of Heavy Metals of Dominant Plant for Ecological Restoration of Stone Coal Mine

Lu¹,

Luo²,

Xiong³

et al. 2021

Adsorption Science & Technology

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The exposed slopes formed by stone mining had caused serious problems of environmental pollution. The ecological restoration was a very effective measure to solve it. In this study, the Indigofera amblyantha Craib was the dominant species in the ecorestoration during the first two years of ecological restoration, which was based on analyzing the importance value (IV) and diversity indexes of plant species. Meanwhile, the ecorestoration process helps slow down the increase of the concentrations of some heavy metals in the substrate material; however, the changing trends of these metals were not uniform. The root and leaf were the main parts of heavy metal distribution, respectively, corresponding to Pb, Cr, As, Sb, and Ni in root and Cu, Mn, and V in leaf. It confirmed that Indigofera amblyantha Craib had an advantage ability to enrich and transfer Cd, Cu, and Mn obtained from their biological concentration factor (BCF) and biological transfer factor (BTF). The Sb, Cd, and V were the main factors affecting the IV by the redundancy analysis. These fine characters of Indigofera amblyantha Craib help explain it well adapted to the ecorestoration of stone coal mines. The current results are valuable to evaluate and extend the application in ecorestoration engineering of mining areas and other heavy metal-contaminated sites.

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“…Presently, approximately 3 billion tons of RM are produced worldwide . The environmental dangers linked with RM arise from soluble compounds, like sodium hydroxide and sodium carbonate, present in it, which can dissolve in rainwater and result in soil and groundwater contamination. , With its composition of typically up to 30–60% Fe 2 O 3 with approx. 4–16% Al 2 O 3 , 1–5% TiO 2 , and up to 900 ppm rare earth elements (with Sc having the highest amount), there have been various attempts to further utilize RM. ,, Several strategies have been proposed for the utilization of RM, including its use as an absorbent for pollutants, a neutralizer for acidic solutions, a construction material, or in pyrometallurgical processes. , Significant efforts have also been made to extract valuable trace elements like Sc.…”

Section: Introductionmentioning

confidence: 99%

Ferrosilicon Production from Silicon Wafer Breakage and Red Mud

Blaesing,

Walnsch,

Hippmann

et al. 2024

ACS Sustainable Resour. Manage.

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The increasing importance of recycling end-of-life photovoltaic modules is demonstrated by the rising quantity of discarded crystalline silicon solar cells that contain valuable metals. Despite advanced recycling methods, the surplus of broken Si wafers poses challenges for reintegration into new module manufacturing. The present study introduces a novel recycling process that addresses this issue and promotes sustainable waste processing, focusing on the untapped resources of Si wafer breakage and environmentally harmful red mud. The proposed method uses these two critical waste materials to enable a silicothermal reduction, yielding ferrosilicon-based alloys.To comprehensively analyze the influence of the iron oxide source on alloy composition, a readily available iron oxide pigment (Bayferrox 110) is implemented as a reference material. Fe−Si-based alloys containing 15 to 65 wt % Si are produced by the silicothermal reduction with soda ash as a flux, at a temperature of 1600 °C. The use of Bayferrox as an iron oxide source facilitates the production of Fe−Si alloys that are free from additional impurities. Moreover, the use of red mud as the source of iron oxide leads to the production of Fe−Si−Ti alloys, containing up to 8.6 wt % of Ti. The inclusion of Ti in the ferrosilicon-based alloy elevates the market value of the resulting products, emphasizing the commercial viability of the suggested recycling process. By simultaneously utilizing two critical waste materials, namely, red mud and Si wafer breakage, this novel recycling strategy demonstrates significant potential, especially in view of a circular and holistic waste management.

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Constructed wetlands for the treatment of bauxite residue leachate: Long term field evidence and implications for management

Cited by 11 publications

References 39 publications

The Microbiology of Metal Mine Waste: Bioremediation Applications and Implications for Planetary Health

The Microbiology of Metal Mine Waste: Bioremediation Applications and Implications for Planetary Health

The Absorption and Distribution of Heavy Metals of Dominant Plant for Ecological Restoration of Stone Coal Mine

Ferrosilicon Production from Silicon Wafer Breakage and Red Mud

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