Oil Sands Tailings 1. Introduction There is a stigma surrounding the Alberta oil sands in terms of environmental hazards. One of the main contributors to this stigma is the generation of large volumes of waste stored in tailings ponds. Tailings ponds are composed of water, residual bitumen, fine mineral particles, and organic compounds, cov-
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The yield stress test of flocculated and thickened copper mineral tailings slurry, and the analysis of flocculant adsorption, were conducted at different pH values and flocculant dosages. ... High settling rate, low-turbidity overflow, and high-concentration underflow are the main characteristics of DCTs [13]. Focusing on these aims, many ...
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Request PDF | On Aug 1, 2013, Yaguan Ji and others published Effect of solution salinity on settling of mineral tailings by polymer flocculants | Find, read and cite all the research you need on ...
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In the present study, laboratory experiments were performed to investigate the geotechnical properties of four different tailings, including two iron tailings (coarse and fine) and two copper …
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Using Nalco-83370+ flocculent, a maximum settling rate of 0.3222 cm/s with a turbidity reduction ratio of 99.02% (having residual turbidity 41.7 NTU) could be achieved, while the Magna-1011 ...
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Inorganic turbidity can limit light penetration in water and reduce phytoplankton photosynthesis. Anthropogenic activities such as mining can produce or augment the amount of suspended inorganic ...
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Enhancing solid-water separation is the key to water recovery and land reclamation from tailings, which is limited by the fine clay particles in MFT (Wang et al., 2024).Fig. 1 (b) shows a consolidated MFT cake after mechanical compression which mainly consists of clay particles. Solid particles with a size equal to or less than 44 μm are considered as fines (Alberta …
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Turbidity tubes: Simple, visual tools for estimating turbidity levels in the field. Total Suspended Solids (TSS) measurement: A more labor-intensive method that involves filtering and weighing water samples. Regular calibration of instruments against known standards ensures consistent and reliable measurements over time. Acceptable Turbidity Levels
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The CTD tailings facility layout, comprising a full perimeter embankment and a centrally located deposition spine, is shown schematically in Figure 3. The TSF was designed to store approximately 36 million tonnes of tailings over seven years life, while maintaining adequate freeboard to accommodate the design storm event
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Dewatering of the final concentrate and tailings of the mineral processing plants is necessary owing to substantial quantities of water accompanied by the ore minerals. …
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1. Introduction. Surface mining and subsequent crude oil extraction from the Canadian oil sands have produced over 1.25 billion m 3 of waste, known as tailings, which is being stored in tailings ponds (AER 2019).Tailings consist of sand, silt, and clay-sized particles and oil sands process-affected water (OSPW) that contains dissolved salts, naphthenic acids, …
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Activities The study links to reclamation through its focus on water balance, which controls both the location of the forest/grassland ecotone and the special patterns of vegetation and carbon …
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The turbidity value varied from 0.30 to 10 NTU (nephelometric turbidity unit) with a 2.94 NTU mean value and was within the acceptable limit recommended by the WHO. The reason for higher turbid ...
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The optimal flocculant dosage of S20.7 tailings is 15 g/t (61.6 ppm, 1.923 mm/s, 61.2 wt%). The turbidity of S5.7 tailings is the smallest when the flocculant dosage is 30 g/t, the ISR is the highest at 20 g/t, and the concentration is the highest at 10 g/t.
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To achieve high % solids, the tailings require thickening, and this approach is becoming more common across the industry. In the TSF, the relatively coarser grained fraction tends to be …
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The regression models for overflow turbidity and underflow concentration of thickened ultrafine tailings both follow a polynomial 2D function, with correlation coefficients (R …
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The mining industry is confronted with substantial challenges in achieving environmental sustainability, particularly regarding water usage, waste management, and dam safety.
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Acceptable metal recoveries from mineral processing vary depending on ore grades and characteristics. However, today, at some mines, it is now possible to recover 95% or more of the contained metal. Thirty or 40 years ago though, processing technologies were generally much less efficient and average recoveries were lower.
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The probability of failure of tailing dams and associated risks demand improvements in engineering practice. The critical state line provides a robust framework for the characterization …
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Table 2-2. Follow-up Requirements in Response to IFE Turbidity Triggers (40 CFR 141.175(b) and 40 CFR 141.563) ..... 19 Table 2-3. Microbial Toolbox Options that Incorporate Turbidity and their Turbidity Criteria [40 CFR
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The mining industry is confronted with substantial challenges in achieving environmental sustainability, particularly regarding water usage, waste management, and dam safety. The increasing global demand for minerals has led to increased mining activities, resulting in significant environmental consequences. By 2025, an estimated 19 billion tons of solid …
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mineral-rich tailings, such as coal tailings, mineral sands tailings, tailings from some oxide ores, and residue from the processing of bauxite, nickel laterite and oil sands, are difficult to dewater mechanically, particularly where the unstable, moisture-reactive sodium smectite clay mineral is present, even in small proportions.
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in tailings ponds and found that aged tailings had greater microbial diversity and biofilms extending past the FFT–water interface, both of which led to higher biostabilization in aged tailings.
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Download Table | Acceptable NTU ranges for turbidity. from publication: Hyperspectral narrow wavebands selection for optimizing water quality monitoring on the Great Miami River, Ohio | Remote ...
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Millions of tons of mineral tailings are produced annually, which leads to safety and environmental issues, including air pollution, water pollution, and soil pollution (Edraki et al., 2014, Wang et al., 2014).Cemented paste backfill (CPB) has been one of the best approaches for tailings management and green mining (Qi and Fourie, 2019, Yin et al., 2020).
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The thickening process is subjected to the feed flow and material quality perturbations, parameters that require to be controlled. The objective of control is to keep a stable % of solids in the thickener underflow discharge, …
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The settling rate and turbidity of MF treated tailings largely depend on solution salinity. The increased solution salinity can cause a more compressed molecular conformation of MF and dramatically reduce the electrostatic repulsion among the negatively charged solid particles and polymers, which enhances the settling of mineral tailings.
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When dam failure occurs, it usually leads to environmental pollution (Fig. 1 c-d), temporary/permanent mine closure and destruction of residential buildings (Fig. 1 e-f), and death of humans and animals (Wu, 2020, Yin et al., 2011).Literature indicated that 285 tailings dam failures have been recorded since 1910 with 2650 fatalities (Guimarães et al., 2022, Piciullo et …
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depth was an acceptable compromise for this relatively sm all test . ... glazes employing marine mineral tailings. Recent Advances in . Marine Science and Technol ogy 1996, 347 – 361. Pacon ...
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oleifera seed powder as a primary coagulant for the treatment of gold mine tailings with respect to turbidity reduction, and the effect of varying pH on the coagulation process. The tailings sample used in the study was collected from an active mining operation in the Waiamu area, Cuyuni Mining District 4, Guyana; with the average
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