Minerals and Mine Drainage

Liang, Huifang; Thomson, Bruce M.

doi:10.2175/106143009x12445568400179

Cited by 14 publications

(3 citation statements)

References 119 publications

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“…However, it have caused several serious environment problems such as the production of large amounts of mine waste, the dispersion of beneficiation tailings, and the acid mine drainage (AMD) [1]. Among them, AMD is the most serious hazard since it contains high acidity and a broad range of heavy metals which have adverse effects on aquatic life and human beings [2][3]. Besides, the hazards of AMD continue even after the mine was abandoned.…”

Section: Introductionmentioning

confidence: 99%

Selective Precipitation of Copper and Zinc over Iron from Acid Mine Drainage by Neutralization and Sulfidization for Recovery

Wang

Ponou

Matsuo

et al. 2014

Int. J. Soc. Mater. Eng. Resour

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In order to selectively precipitate copper (Cu) and zinc (Zn) over iron (Fe) for recovery from an acid mine drainage (AMD) generated from an abandoned copper mine located in east Japan, the feasibility of a treatment process combining lime neutralization with sodium hydrosulfide (NaHS) sulfidization was investigated. First of all, lime neutralization was applied to the AMD to find the precipitation behaviors of Cu, Zn, and Fe. Next, NaHS sulfidization as well as the integration with lime neutralization were conducted to selectively precipitate Cu, Zn, and Fe from the AMD. The results show that by adding more than 20 mg/L NaHS into the AMD at pH 2.8 without pH adjustment, all of the Cu precipitated whereas Fe and Zn did not. Fe could be selectively precipitated over Zn afterwards by lime neutralization at pH 5; however, the addition of an oxidizing agent such as 0.02 vol.% H 2 O 2 was needed. On the other hand, after Fe was fully precipitated previously by lime neutralization at pH 5, all of the Cu precipitated when 10-15 mg/L NaHS was added whereas Zn did not. After Cu and Fe were precipitated, Zn could be precipitated by lime neutralization at above pH 9.

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Section: Introductionmentioning

confidence: 99%

Selective Precipitation of Copper and Zinc over Iron from Acid Mine Drainage by Neutralization and Sulfidization for Recovery

Wang

Ponou

Matsuo

et al. 2014

Int. J. Soc. Mater. Eng. Resour

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“…ΣREEs are positively correlated with fluoride complex concentrations in groundwater in the Bear Lodge carbonatites, Wyoming, USA [11] and the Datanhao mine, Daqingshan Coalfield, northern China [12]; other studies have elucidated that the presence of sulfate can significantly fertilize the REE-mineralizing fluids [13]. At present, geochemical studies on REEs in water bodies are concentrated in coal mine drainage (CMD) and acidic mine drainage (AMD), while studies related to REEs in deep groundwater are obviously insufficient [14][15][16].…”

Section: Introductionmentioning

confidence: 99%

Hydrogeochemical Characteristics and Evolution of Groundwater Quality of an Abandoned Coal Mine in Huaibei Coalfield, Eastern China

Feng,

Liu,

Chen

et al. 2024

Pol. J. Environ. Stud.

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In this study, major ions, isotopes and rare earth elements (REEs) were tested in groundwater from the coal-bearing sandstone aquifer of the Wolonghu coal mine in northern Anhui Province, and the elemental geochemical behavior and controlling factors in groundwater were discussed. The results indicate that the overall sandstone water is weakly alkaline, and the hydrochemical type is SO 4 -Na. The relationship between δD and δ 18 O suggests a hydraulic connection between the sandstone aquifer and the limestone aquifer. The composition characteristics of δ 34 S SO4 and δ 18 O SO4 indicate that the high concentration of SO4 2in groundwater mainly comes from the dissolution of sulfate minerals. The content of rare earth elements (ΣREEs) in groundwater is controlled by pH value and carbonate complexation reaction, and it shows a relative enrichment feature of heavy rare earth elements (HREEs) after standardization with Post-Archean Australian Shales. Ce shows a slight negative anomaly and is mainly influenced by the redox environment, while the Eu anomaly is attributed to the dissolution of silicate minerals. Compared to groundwater quality before the mine closure, the weakening of hydraulic conditions led to an increase in ΣREEs, Ca 2+ , Mg 2+ , SO4 2-, and TDS concentrations accompanied by a significant decrease in HCO 3 concentration. In addition, the difference between light rare earth elements (LREEs) decreased, whereas the differentiation between LREEs and HREEs gradually increased. Our findings provide valuable insights into the evolution of groundwater quality in abandoned mines and its genesis mechanism. The results could guide the utilization of groundwater resources in abandoned mines.

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“…Microbial activity enhances this process by orders of magnitude. In particular, iron-or sulfide-oxidizing bacteria, e.g., Acidithiobacillus ferrooxidans, Leptospirillium ferrooxidans, and Ferroplasma acidiphilum or F. acidarmanus play an important role (Banks et al, 1997;Kothe et al, 2005;Liang and Thomson, 2010;Haferburg and Kothe, 2010).…”

Section: Introductionmentioning

confidence: 99%

Live and death of streptomyces in soil—what happens to the biomass?

Schütze

Miltner

Nietzsche

et al. 2013

Z. Pflanzenernähr. Bodenk.

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The formation of soil organic matter (SOM) has been proposed to depend on fragmentation of biomass after cell death. However, this is hard to mimic in laboratory experiments showing the process directly. We used heavy metal contamination in order to provide an environment in which one Streptomyces strain, the heavy metal resistant S. mirabilis P16B-1, could survive while the sensitive strain S. lividans TK24 was expected to die and disintegrate; the necromass fragments would then contribute to SOM formation. Both strains were grown for 30 d in sterile mesocosms containing either highly metal-contaminated soil from a former uranium-mining site in Ronneburg, Germany, or control soil from a municipal park, Jena, Germany. The fate and morphology of living and dead bacterial biomass (necromass) was observed using scanning electron microscopy. Attachment of soil particles to the intact mycelium as well as decay of dead biomass was observed. Dead bacterial biomass was identified in form of patchy fragments while the superordinate filamentous structure of the hyphae was still visible and obviously stabilized in soil. The fate of cytosolic compounds was followed using the example of a nickel-containing superoxide dismutase (NiSOD) which was found to be released after death of cells grown in liquid soil-extract medium. Activity of the enzyme was proven for concentrated media supernatant by a gel-based qualitative activity assay. This indicates that NiSOD remains active in soil after cell death. Hence, bacterial cell death results in the release of cytosolic compounds, e.g., intact proteins, as well as the formation of residual cell-envelope fragments contributing to SOM formation.

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Minerals and Mine Drainage

Cited by 14 publications

References 119 publications

Selective Precipitation of Copper and Zinc over Iron from Acid Mine Drainage by Neutralization and Sulfidization for Recovery

Selective Precipitation of Copper and Zinc over Iron from Acid Mine Drainage by Neutralization and Sulfidization for Recovery

Hydrogeochemical Characteristics and Evolution of Groundwater Quality of an Abandoned Coal Mine in Huaibei Coalfield, Eastern China

Live and death of streptomyces in soil—what happens to the biomass?

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