Metal tailings

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  Machine learning models for occurrence form prediction of heavy metals

  ·This study used gradient boosting regression tree GBRT approaches to predict heavy metal occurrence forms in tailings with tailings mineralogy information and heavy metal properties as input variables and the percentages of seven occurrence forms as output variables The optimum GBRT model achieved excellent performance with R

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  （）、SCIENCE OF THE

  ·The extensive literature confirms that the BSCs distributed on metal tailings including all major types of metal tailings in different climatic regisions are common BSCs perform various ecological functions in tailings including HM stress reduction soil structure improvement soil nutrient increase biogeochemical cycle enhancement and

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  Biocrusts significantly affect the bioavailability and

  ·Metal tailings resulting from mining operations pose significant environmental challenges These tailings leach heavy metals such as arsenic As and chromium Cr from sulfides in the piles leading to surface fragmentation nutrient losses and heavy metal toxicity Buch et al 2021; Khan et al 2008 These contaminants impede

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  The Reprocessing and Revalorization of Critical Minerals in Mine Tailings

  ·Heavy metal contamination from mine tailings presents a similar problem within the given ecosystem soil degradation water contamination and negative biotic externalities can result from high concentrations of heavy metals in and near tailings waste One method of reducing the concentration of heavy metals that is being examined is

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  An ecological remediation model combining optimal

  ·The original ore contained mg/kg silver and there was still about 40 mg/kg silver in the tailings after mining Element composition of XRF test Table 1 showed the tailings were mainly Si and Al the element contents of Fe K Cd Ca S Mg Mn were above 1% and what was worth paying attention to was the tailings contained a

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  Influence of coal gangue aided phytostabilization on metal

  ·Copper mine tailings without proper remediation deposited permanently in tailings ponds would pose adverse impacts to the environment Coal gangue with high nutrients used in infertile soil is investigated in microcosm trials to explore the possibility of immobilize metals within the copper mine tailing in this research Therefore a pot trial

  The adaptability distribution ecological function and

  ·The natural restoration of metal tailings without assistance is powerful but it often takes a long time or may not occur at all because of adverse conditions Bradshaw 2000 The primary obstacle limiting tailing ecological restoration is the excessive amount of HMs Tordoff et al 2000 How BSCs adapt to the excessive HMs in tailings is a

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  Geochemical Characteristics of Tailings from

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  Tailings SpringerLink

  ·In future base metal tailings and low grade metal ores may be planted with suitable plant species which extract the metals from the substrate Scientific Issue Phytomining may not only recover metals from wastes but the technique may also turn hazardous materials into benign wastes with much lower metal concentrations

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  Underestimated environmental benefits of tailings resource

  ·Among the tailings produced in China in 2019 iron tailings were 520 million tons accounting for % copper tailings were 325 million tons accounting for % and the rest were rare and precious metal and non metal tailings Du et al 2020 Among all types of tailings non ferrous metal tailings have a tremendous pollution potential

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  Leaching characteristics of heavy metals in tailings and their

  ·The DoseResp model perfectly fitted the leaching of all heavy metals from the tailings R 2 > In conjunction with the findings of the column experiment and correlation analysis the chemical form rainfall pH ammonia nitrogen and mineral properties were identified as the primary factors controlling heavy metal release from

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  Bacterial shifts during in situ mineralization bio treatment to

  ·These functions might have an important role in the detoxification of metals in tailings as several metal efflux pumps Kerr 2004; Zhou et al 2009 and in maintaining the genomic stability Barber et al 2008 This observation suggested that the bacterial communities of the surface layer were adapted to the conditions at the end of

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  Comprehensive Utilization and Resource Utilization of

  ·Utilization of Nonferrous Metal Mine Tailings Nan Lu1 2 3 4 5 Peng Wang1 3 4 5 1Shaanxi Land Engineering Construction Group Co Ltd Xi an Shaanxi 2Technology Innovation Center for Land Engineering and Human Settlements Shaanxi Land Engineering

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  Tailings Management in Extractives SASB

  ·The project evaluated the Metals & Mining and Coal Operations Standards for potential revision to ensure that disclosures more fully captured the risks associated with the management of tailings storage facilities TSFs The project also aimed to improve the global applicability of the Standards

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  Chlorella sorokiniana FK montmorillonite interaction

  ·Non ferrous metal mining activities are known to cause ecological irreversible damage in the tailings and surrounding areas as well as heavy metal HM contamination The enhancement of Chlorella montmorillonite interaction on the remediation of HM contaminated tailings was verified from the lab to the tailings in Daye City Hubei

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  Influence of coal gangue aided phytostabilization on metal

  ·Copper mine tailings without proper remediation deposited permanently in tailings ponds would pose adverse impacts to the environment Coal gangue with high nutrients used in infertile soil is investigated in microcosm trials to explore the possibility of immobilize metals within the copper mine tailing in this research Therefore a pot trial

  Towards mine tailings valorization Recovery of critical

  ·Mine tailings are waste obtained from the processing of a rock with a view to obtain one or more products that will be refined to finally get a metal s that is needed Tailings should be stored in facilities where they are disposed in accordance with the regulations binding in each region otherwise the consequences to the environment can

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  New approaches for extracting and recovering metals from mine tailings

  ·Mineral tailings from two copper mines were bioleached under different conditions • Greatest copper extraction was achieved at extremely low pH at 45 °C and under oxidative/reductive Copper present in tailings PLS was selectively precipitated as CuS by biogenic H 2 Microbial communities were dominated by Sb

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  All of the World s Mine Tailings in One Visualization

  ·Tailings are what is left over after mills separate the metal from the mined rock The processed material tailings comes from the tail end of a mining mill and comprise fine particles mixed with water forming a slurry Mining companies will store this waste in dams or ponds Not All Minerals Are Equal Tailings Contribution by Commodity

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  Metal uptake from iron ore mine tailings by perennial ryegrass

  ·Background and aims Mine tailings often contain high concentrations of metals that may lead to serious environmental concerns Phytoremediation by suitable plant species coupled with organic amendments represents an intriguing way of improving the quality of mine tailings Methodology We conducted a glasshouse pot study to assess the

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