(PDF) Characterization of a Bacterial Community in an …
The K4 sulfur oxidizer was a member of the Gammaproteobacteria subphylum, while the K6 oxidizers included members of both Betaproteobacteria and Gammaproteobacteria (Table 4; Fig. 2). ... were significantly lower in both tailing samples than in the OS sample (F2,6 ⫽ 555.53, P ⬍ 0.0001). The K4 (pH 2.7) tailing sample had remarkably low ...
A study on the desulfurization of sulfidic mine …
Flotation was used to recover the sulfide minerals and generate tailings with low sulfur content. The Cu-Pb-Zn-rich product could go to further treatment (e.g. …
Recovery of pyrite from copper tailings by flotation
The pyrite grade in the fresh tailing sample and in the flotation product was determined indirectly from the content sulfur, copper and iron. Calculations carried out considering the elemental chemical composition presented in Table 1 and the mineralogical species that contained sulfur, identified by the XRD analysis, allowed to determine that …
Pollution characteristics and assessment of sulfide tailings …
The weathered tailing sample was collected from an old waste dump, and the fresh tailing sample was collected prior to its entry into tailing piles. Each type of tailing sample, ... = MPA − ANC s - Content of sulfur in tailing samples, %;w - Weight of tailing samples, g. A 2.5 g sample portion was added to a 500 mL volumetric flask.
High precision analysis of all four stable isotopes of sulfur …
The Geophysical Lab irm-GCMS system was tested for in situ analysis of a pyrite sample that was previously analyzed in our laboratory for δ 33 S and δ 34 S (Hu et al., 2003).For most analyses, laser pits of 150 μm diameter and 150 μm depth were produced with a UV laser (KrF), and yielded ca. 170 nmol SF 6.Smaller laser spots were …
Tailings Landscape
This 2019 study of approximately 30 guidance documents, project initiatives and standards from around the world was undertaken by GMG and Cambrian College. It offers an understanding of existing practices and initiatives covering mine tailings throughout the global mining industry. This landscape was last updated by GMG in 2022.
(PDF) Quantitative Microbial Community Analysis of Three …
The microbial communities of three different sulfidic and acidic mine waste tailing dumps located in Botswana, Germany, and Sweden were quantitatively analyzed using quantitative real-time PCR (Q ...
Review on the Influence and Control of Sulfur …
The cemented sulfur tailings backfill's stability decreases, the exterior layer-by-layer spalling, and the aggregate is exposed. Magnesium Sulfate: SO 4 2− /Mg 2+ C-S-H phase: Low pH (PH < 10) …
Experimental study on mechanical characteristics of copper tailing
Two types of tailing materials with high and low sulfur contents, obtained from an under-construction tailing pond in western China are tested, and the physical and mechanical properties, including specific gravity, hydraulic conductivity, shear strength or consolidation parameters, are measured. The effect of two saturating methods, capillary ...
Comprehensive utilization of lead–zinc tailings, part 1: …
The MPA (kg H 2 SO 4 /t) was calculated according to the content of the sulfur in the sample: ... Therefore, to remove the sulfur from the tailing was of great significance to eliminate environmental pollutants. Thermal analysis of the tailings. A thermogravimetric analysis was studied to obtain the roasting characteristics of the tailings.
Recent Advances and Future Prospects on the Tailing …
When sulfur-containing tailings are placed below the water surface, the low solubility (25 °C, 8.6 mg·L −1) and low effective diffusion coefficient (D e = 2 × 10 −9 m 2 ·s −1) of oxygen in water can be utilized to create a natural anoxic environment, which can theoretically permanently inhibit the oxidation activity of tailings ...
Speciation of Mercury Contaminant in Public Gold Mine Tailing …
Upon the accomplishment of reactions, the TCLP tests were performed. Figure 2. Tailing waste flows from the amalgam mixing drum near the sample collection point RESULTS AND DISCUSSIONS Mercury content in tailing The mercury concentrations in the tailing pile samples varied from 277.47 to 352.32 mg/kg (Table 1).
Desulfurivibrio spp. mediate sulfur-oxidation coupled to …
Four different sample types (15 replicates for each type) were collected, including Sb mine tailings (tailing), adjacent soil (soil), rice paddy (paddy), and river sediments (sediment ...
Geochemistry and mineralogy of auriferous tailings …
Location of the QF (a), Nova Lima Region and the location in the QF (b), and the illustration location of the tailings deposit 1 to deposit 5.Google earth Pro V …
Recent practices in mine tailings' recycling and reuse
Pyrrhotite, as an iron sulfide with a lower sulfur content over pyrite, can also be produced during the thermal treatment of sulfidic mine tailings. ... Submarine and deep-sea mine tailing placements: a review of current practices, environmental issues, natural analogs and knowledge gaps in Norway and internationally. Marine Pollution Bulletin, ...
Distribution patterns of contaminants in the Mogale Gold tailing …
The Mogale tailing dam is over 3 km by 2 km in length and breadth, respectively, and about 60–75 m high (Fig. 1).The water flow out of the Mogale tailing dam is controlled through a central penstock that discharges into a return water dam (Oelofse et al. 2007).The central penstock controls the general hydrological gradient, the fluid flow, …
Characterization of Heavy Metals and Sulphur Isotope in …
solids in other tributaries, whereas sulphur in water originates from mine tailing dissolution, spring water, rain water and dissolution of gypsum. Inconclusion, the environmental impact of mine tailing ... water does not turn clear until it reaches sample site 6. The oxidation of sulfides in the mine tailing piles releases heavy metals such as
Innovative Methodology for Sulfur Release from Copper
The copper tailing samples (LW) used in this study were obtained from Liwu Copper, Sichuan, China. The collected samples were dried, crushed, and ground to 100 mesh. ... Surprisingly, when air flow was 0 L/min, sulfur in the sample was released as sulfur vapor rather than SO 2. The results are observed in Figures 11(a) and 11(b). It …
(PDF) Innovative Methodology for Sulfur Release from
At the same time, the content of sulfur in the sample (LW) was relatively high. With oxygen and water, it was easy. ... Figure 3: XRD spectra of the copper tailing sample (LW).
Process effluents and mine tailings: sources, effects and
Specific tailing properties need to be considered for the proper tailings management. Among the specific properties, for example the presence of sulfide minerals in base and precious metal mine tailings, and the presence of mineral solids in oil sand tailings that are extremely fine and do not readily separate from the process-affected water ...
A study on the desulfurization of sulfidic mine tailings for the
Neves Corvo tailing sample: B: Oversize from sieving of A: C: ... The resulting new tailings represent 49 % of sample B's mass but contain only 2.9 % - 4.1 % of the initial sulfur in sample B. Further tests using half of the collector dosage (50 g/t) and a shorter time (5 min) demonstrated that the flotation of the oversize particles under ...
Quantitative Microbial Community Analysis of Three …
inorganic sulfur was 4.1% on average in the investigated samples, and total ... The geochemistry and mineralogy of the tailing dump and the sampling proce-dure have been previously described (21). ...
Mine Tailings Sampling Technique
Tailings are variable by essence with mining and processing. For instance, early Pb-Zn tailings are generally pyrite-poor as pyrite was valorized for sulphur. Since a few …
O2 partitioning of sulfur oxidizing bacteria drives …
This study provides genomic evidence explaining acidity generation and thiosulfate accumulation patterns in a circumneutral mine tailing impoundment and has …
Environmental Risks From Mine Tailings
Tailings deposited as large piles can cause a variety of environmental problems: Slumps, landslides. Tailing piles can be unstable, and experience landslides. In 1966, in Aberfan, Wales, a hill of ...
Geochemistry and mineralogy of auriferous tailings deposits …
Sulfur concentrations can be explained by the presence of sulfides, while Al is related to the presence of aluminum silicates such as muscovite and chlorite (Table 3). Deposits 3 and 2 are ...
An Introduction to Tailings Facilities
Tailings facilities during mine operation and afterward are the responsibility of mining companies. Government agencies regulate tailings and set minimum design standards. Tailings facilities are often a key element in the regulatory process governments employ to ensure the environmental effects are identified and considered before regulatory ...
Map of soil sampling location | Download Scientific Diagram …
Keywords: mercury; gold mine, speciation, sulfide, sulfur, tailing View Solidification and stabilization of mercury-contaminated tailings in artisanal and small-scale gold mining using tras soil
Optimization of sample preparation method of total …
R. Alam. 215 Accesses. 3 Citations. Explore all metrics. Abstract. A sample preparation method of total sulphur measurement of reactive mine tailings was …
Cementing sulfur tailings using low-clinker cement
Therefore, using M32.5 cement with low clinker to cement sulfur tailings effectively avoids the incompatibility effect of sulfate produced by ST on cement-based materials. The small amount of ettringite produced by cement hydration can fill the micropores of the mortar and is conducive to developing strength.
