Manganese mining waste as a novel supplementary material in Portland cement

Pimentel, Maurílio Gomes; Silva, Micael Rubens Cardoso da; Viveiros, Danielle de Cássia Santos de; Picanço, Marcelo S.

doi:10.1016/j.matlet.2021.131459

Cited by 10 publications

(5 citation statements)

References 14 publications

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“…Regarding abandoned tailings, a sustainable alternative to manage these MEL is their reutilization and reuse in the construction industry [79,80]; tailings have been reused to fabricate bricks, ceramic materials, and cement [81][82][83]. Therefore, efforts should be focused on searching for the sustainable utilization of mining waste, promoting a circular economy.…”

Section: Management and Public Policy: Suggested Actionsmentioning

confidence: 99%

Risk Assessment of Mining Environmental Liabilities for Their Categorization and Prioritization in Gold-Mining Areas of Ecuador

et al. 2022

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Mining environmental liabilities (MEL) are of great concern because of potential risks to ecosystems and human health. In this research, the environmental risk (RI) related to MEL existing in three artisanal and small-scale gold-mining areas of Ecuador was evaluated. For this purpose, data of 167 MEL including landfills, mining galleries, tailing deposits, and mineral processing plants from Macuchi, Tenguel–Ponce Enriquez, and Puyango mining areas, were analyzed. The risk assessment related to the presence of waste deposits was carried out based on the methodology proposed by the Spanish Geological Survey. Moreover, the procedure outlined in the Environmental Risk Assessment Guide of the Ministry of Environment of Peru for nonwaste deposits was applied. The highest RI values were identified in Puyango and Tenguel–Ponce Enriquez. Thus, they were both categorized as priority control areas requiring intervention and rehabilitation plans. The MEL that require a high level of intervention include waste deposits and mine entrances associated with potentially toxic elements. Moreover, the point risk maps showed that rivers in the studied areas have a potential pollution risk. This study provides risk levels associated with MEL in mining areas from Ecuador. This information could be used for environmental management and pollution mitigation.

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Section: Management and Public Policy: Suggested Actionsmentioning

confidence: 99%

Risk Assessment of Mining Environmental Liabilities for Their Categorization and Prioritization in Gold-Mining Areas of Ecuador

et al. 2022

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“…Maurilio et al have reported that the addition of MS decreased the porosity of cement concrete cured for 28 days, thus increasing the corresponding compressive strength at a rate of 0–42.1%. Meanwhile, the flexural strength was increased by the maximum rate of 41.7% [ 23 ]. Moreover, MS has been proved to improve the chloride ion penetration resistance and frost resistance of concrete [ 24 ].…”

Section: Introductionmentioning

confidence: 99%

The Influence of Manganese Slag on the Properties of Ultra-High-Performance Concrete

Xu,

Yu,

Wang

2024

Materials

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Manganese slag (MS) is a kind of chemical waste, which may pollute the environment if conventional handling methods (stacking and landfill) are applied. Ultra-high-performance concrete (UHPC)—with considerably high compactness and strength—can be used not only as a special concrete material, but also to solidify the toxic substances in solid waste. This study proposes the addition of MS to UHPC, where the mass ratio of MS varies from 0% to 40% in the total mass of MS and silica fume. The effects of MS on the fluidity, plastic viscosity, and yield shear stress are investigated, and the flexural strength, compressive strength, and dry shrinkage rate of UHPC with MS are measured. X-ray diffraction (XRD) spectrum and energy spectrum analysis (EDS) diagrams are obtained to analyze the performance mechanism of the UHPC. A rheological study confirms that the slump flow increases with the increasing rate of 0–14.3%, while the yield shear stress and plastic viscosity decrease with the rates of 0–29.6% and 0–22.2%, respectively. The initial setting time increases with the mass ratio of MS by 0–14.3%, and MS has a positive effect on the flexural and compressive strengths of UHPC. In the early curing stage (less than 14 days), the increasing rate in the specimens increases with the curing age; meanwhile, when the curing age reaches 14 days or higher, the increasing rate decreases with increasing curing age. The compactness of UHPC is increased by adding MS. Furthermore, MS can increase the elements of Al and decrease crystals of Ca(OH)2 and calcium silicate hydrate in UHPC.

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“…Due to extensive mining and ore processing, there are voluminous abandoned mine tailings, low-grade ore, and heaps of ore concentrate at the main mines (25th Km and Mavro Xylo) adjacent to Kato Nevrokopi area, which seek environmental management [16]. Manganese ore ranks among the most extensively processed materials globally, holding crucial significance mainly in the manufacturing of steel alloys, chemicals, and batteries [17]. Nevertheless, the mining processing of this ore results in the accumulation of substantial waste in open-air landfills, with a high environmental impact, contaminating the soil and plants but, most importantly, affecting human neural health [18,19].…”

Section: Introductionmentioning

confidence: 99%

Electrochemical Behavior of Natural Manganese Oxides: Transforming Mining Waste into Energy Storage Materials

Soulamidis,

Kourmousi,

Mitsopoulou

et al. 2024

Minerals

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The present research explores the potential of manganese oxide waste ore in energy storage applications, focusing on supercapacitors. The investigation assesses the electrochemical capabilities of natural manganese oxides obtained from the Drama region, which has been the main mining center of Greece for manganese ore, especially that of battery-grade quality. Samples were collected from abandoned mining sites in the Kato Nevrokopi area, Drama. The structure and composition of the manganese minerals were determined by X-ray diffraction (XRD) and transmission electron microscopy (TEM). Electrochemical tests involved the preparation of electrodes using natural nsutite and heat-treated nsutite (hausmannite). Then, the designed electrodes were subjected to cyclic voltammetry tests and charge–discharge measurements. The hausmannite electrode exhibited a higher specific capacitance of 667 F/g at a current density of 0.2 A/g, and the electrode material retained 98.3% of its initial capacitance after 1000 cycles. This study provides new perspectives on simple and efficient methods for transforming natural nsutite material from mining waste to hausmannite with greater structural homogeneity and better electrochemical behavior.

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Manganese mining waste as a novel supplementary material in Portland cement

Cited by 10 publications

References 14 publications

Risk Assessment of Mining Environmental Liabilities for Their Categorization and Prioritization in Gold-Mining Areas of Ecuador

Risk Assessment of Mining Environmental Liabilities for Their Categorization and Prioritization in Gold-Mining Areas of Ecuador

The Influence of Manganese Slag on the Properties of Ultra-High-Performance Concrete

Electrochemical Behavior of Natural Manganese Oxides: Transforming Mining Waste into Energy Storage Materials

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