A brief procedure to fabricate soils from coal mine wastes based on mineral processing, agricultural, and environmental concepts

Firpo, Beatriz Alícia; Filho, Juarez Ramos do Amaral; Schneider, Ivo

doi:10.1016/j.mineng.2014.11.005

Cited by 20 publications

(8 citation statements)

References 21 publications

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“…Avena strigosa dry matter production was significant-ly positively affected by treatments combining BWR and SS (treatments B and E) - Figure 1C. Similar results were obtained by Firpo, Amaral-Filho and Schneider (2015) and Weiler, Firpo and Schneider (2018), where the combination of coal mine waste and sewage sludge along with steel slag and rice husk ash allowed the growth of Avena strigosa (black oats) and Megathyrsus maximus var. maximus (guinea grass).…”

Section: Resultssupporting

confidence: 64%

Integrated use of sewage sludge and basalt mine waste as soil substitute for environmental restoration

et al. 2020

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If not managed properly, mining waste can be detrimental to the environment. In addition, sewage treatment plants produce sludge, a biowaste rich in organic matter which is often sent to landfills. The present study evaluated the use of sewage sludge as an amendment for mine waste from a basalt quarry as an alternative to the use of soil from borrow areas during environmental restoration. An ex situ experiment was developed at the Federal University of Rio Grande do Sul-UFRGS. The experimental delineation compared the addition of two sources of organic matter (sewage sludge-SS and cover soil from that same region-CS) to basalt waste rock (BWR) against the sole use of cover soil, which a current restoration technique. The graminoid Avena strigosa (black oats) and soil fertility tests were used as indicators of soil conditions. Amending BWR with SS led to the best physical and chemical conditions and the highest production of dry matter in comparison to the use of CS as amendment or its single use as cover soil. These results show that mixing SS to BWR can be used as a substitute for cover soil during the environmental restoration of basalt quarries, further contributing to the final disposal of these materials.

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Section: Resultssupporting

confidence: 64%

Integrated use of sewage sludge and basalt mine waste as soil substitute for environmental restoration

et al. 2020

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“…A two-stage desulphurisation flotation process has been developed to valorise ultrafine coal wastes [8,10]. The first stage of the flotation process, the focus of this paper, recovers clean coal from the waste while the second stage recovers pyrite into the small volume concentrate fraction, which results in a high volume, low-sulphur tailings that has reduced or no risk of acid generation; both these fractions can be re-purposed for other applications [9,[11][12][13][14]. This minimises or entirely avoids the waste formation.…”

Section: Introductionmentioning

confidence: 99%

Algal Lipids as Biocollector for Recovery of Coal from Fine Coal Waste by Froth Flotation

Harrison

Fagan-Endres

2020

Minerals

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Raw algal lipids (RALs) and their derivatives (fatty acid methyl esters; FAMEs) were investigated as biocollectors for the recovery of coal from ash-rich fine coal waste by froth flotation. Testing was done on fine coal discards from two South African sites—a high ash (50%), high sulphur (5.7%) sample and a lower ash (26%), low sulphur (0.91%) sample. The yield and recovery of combustibles on using biocollectors was similar to, or better than, with oleic acid, a polar collector demonstrated as a good collector in previous research. The RALs and FAMEs reduced the ash and sulphur content of the combustible fraction of the high ash-high sulphur sample to between 23–28% and 1.9–3.3%, respectively. The chemical modification of RALs to FAMEs provided potential for improving the selectivity of the recovery of combustibles. It also resulted in a change of the optimum operating pH, with RALs yielding better results at the natural pH of the sample (pH 2.7), while FAMEs performed best at pH 7.

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“…In many different parts of the world, coal mine waste rocks generated by coal mining (extraction and processing) affected and damaged the environment due to the huge amount, occupied area, and acid generation [1][2][3][4][5][6][7]. However, many researches were focused to increase environmental performance in the mining sector.…”

Section: Introductionmentioning

confidence: 99%

Ecofriendly bricks elaborated from coal waste of Moroccan Jerrada Mining

et al. 2018

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Abstract. Solid waste generated during mining is one of the major environmental problems associated with this industrial activity. The best solution to overcome the environmental impact of this waste is to find recycling facilities in mass-produced products that can absorb the large quantities of these available byproducts. The present study shows the feasibility of using the coal waste of Moroccan Jerrada mining in the production of ecological brick. The first step consists of consecutive stages of crushing, grinding and heating at 650°C of the coal waste with a small amount of lime in order to promote the reactive products of elaborated binders. The second step of the process consists of mixing treated coal waste with a small amount of marble dust, sand, gravel, and water, then pressed and dried at room temperature to manufacture a laboratory ecofriendly bricks. The mechanical strength and thermal conductivity are investigated.

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A brief procedure to fabricate soils from coal mine wastes based on mineral processing, agricultural, and environmental concepts

Cited by 20 publications

References 21 publications

Integrated use of sewage sludge and basalt mine waste as soil substitute for environmental restoration

Integrated use of sewage sludge and basalt mine waste as soil substitute for environmental restoration

Algal Lipids as Biocollector for Recovery of Coal from Fine Coal Waste by Froth Flotation

Ecofriendly bricks elaborated from coal waste of Moroccan Jerrada Mining

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