Stabilization/solidification of nickel-containing electroplating sludge by sustainable geopolymer: Mechanism and applicability

Journal of environmental chemical engineering, Journal Year: 2025, Volume and Issue: 13(2), P. 115717 - 115717

Published: Feb. 7, 2025

Language: Английский

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Green transformation of mining waste: Synergistic effects of coal mine drainage sludge and industrial by-products in high-performance geopolymer production and environmental benefits

Construction and Building Materials, Journal Year: 2025, Volume and Issue: 471, P. 140595 - 140595

Published: March 12, 2025

Language: Английский

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Microstructure, strength development mechanism and CO2 emission assessments of molybdenum tailings collaborative fly ash geopolymers

Case Studies in Construction Materials, Journal Year: 2024, Volume and Issue: 21, P. e03608 - e03608

Published: Aug. 6, 2024

A cost-effective approach is urgently needed to utilize molybdenum tailings (MoT), a mining byproduct with rising output. This study explored the preparation of collaborative fly ash (FA) geopolymers (MFG) from mechanically activated MoT and FA raw materials. Orthogonal experiments investigated impacts various parameters on compressive strengths MFG. The macroscopic properties MFG different mixture ratios were evaluated. microstructures components characterized using methods. Fractal dimensions (Ds) pore structures in samples determined. Carbon emissions resulting production calculated evaluated Low carbon Assessment. findings showed that increasing content system decreased flowabilities prolonged setting times. optimal MoT-to-FA ratio for achieving highest strength 31.26 MPa was 1:4, Si/Al 2.03 system. XRD, TG, SEM-EDS, FTIR analyses confirmed primary product glassy hydrated sodium-aluminum silicate (N-A-S-H) gel. MIP analysis revealed addition improved structure MFG, leading smaller pores. Additionally, composed solely or FA, Ds smaller, particles materials also led values. Conversely, when mixed, larger values observed, closer volume fraction two resulted Furthermore, emission reduced by 45.4 %-64.3 % compared traditional OPC slurries.

Language: Английский

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Recycling of copper tailing as filler material in asphalt paving mastic: A sustainable solution for mining waste recovery

Case Studies in Construction Materials, Journal Year: 2024, Volume and Issue: 20, P. e03237 - e03237

Published: April 30, 2024

Language: Английский

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Research on leaching kinetics and reactivity evaluation of copper tailings as precursor for alkali-activated materials

Case Studies in Construction Materials, Journal Year: 2024, Volume and Issue: 21, P. e03663 - e03663

Published: Aug. 24, 2024

Copper tailings are by-products of copper mining, and because their rich content SiO2 Al2O3, it is considered as a possible raw material for the preparation geopolymer composites. In this paper, leaching kinetics reactivity reactive elements Si Al in under alkali hydrothermal environment investigated, reasons difference between granulated blast furnace slag (GBFS), fly ash (FA) also introduced. The results show that leached precursor materials involved formation N/C-A-S-H. Similar to FA GBFS, behavior mainly controlled by diffusion through surface product layer. Additionally, activation energy lower than Si, which makes Al-O bond easier break alkaline environment, thus causing rate be higher Si. Meanwhile, energies 69.29 kJ/mol 33.91 kJ/mol, respectively, elemental efficiency dissolution lower, main reason tailings. This study aims elucidate interrelationships physicochemical properties,

Language: Английский

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Assessing the immobilization performance of fly ash-based geopolymers for removal of cesium and treatment of radioactive wastewater

Materials Today Communications, Journal Year: 2025, Volume and Issue: unknown, P. 112638 - 112638

Published: April 1, 2025

Language: Английский

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Plastic viscosity, microstructural, and mechanical characteristics of sustainable geopolymers based on metakaolin with the incorporation of long-neck bottles waste glass

Matéria (Rio de Janeiro), Journal Year: 2025, Volume and Issue: 30

Published: Jan. 1, 2025

ABSTRACT Long-neck glass bottles are not returned for reuse by the industry, which has generated a large quantity of waste with environmental impacts current and future generations. The main raw material employed to synthesize geopolymeric materials is metakaolin, although relationship between silica alumina content ideal. Often, silicates in activating solution complement required SiO2 content. An eco-efficient option would be use long-neck as an additional source silica. This work evaluates plastic viscosity, microstructural, mechanical characteristics non-conventional metakaolin geopolymers based on incorporation from replacement 0, 10, 20, 30% blue, green, amber bottles. best combinations SiO2/Al2O3, NaOH concentration, curing temperature were selected produce geopolymers, evaluated through rheology, x-ray diffractometry, compressive strength. results indicate lower flow resistance residue, accordance increase residue system. occurrence geopolymerization was observed without waste, ambient thermal curing. strength, at 90 days 10% higher than value reference sample 4.1%, 29.1% 21.0% green long neck residues, respectively.

Language: Английский

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Reuse of Mine Tailings Through Geopolymerization Applied to 3D Printing: A Review of Progress, Challenges and Perspectives

Sustainability, Journal Year: 2025, Volume and Issue: 17(6), P. 2617 - 2617

Published: March 16, 2025

The increasing global demand for metals, driven by technological progress and the energy transition, has led to an acceleration in expansion of mining metallurgical industry, resulting increase generation mine tailings. This waste, which is heterogeneous composition high contaminant potential, represents significant environmental social challenges, affecting soils, water, geotechnical stability accumulation these tailings poses a problem not only terms quantity, but also physicochemical composition, exacerbates their impact due release heavy ecosystems nearby communities. article reviews potential geopolymerization 3D printing as solution management tailings, offering effective alternative reuse sustainable building materials. Alkaline activation aluminosilicates facilitates formation N–A–S–H C–A–S–H cementitious structures, thereby providing enhanced mechanical strength chemical stability. Conversely, optimizes structural design minimizes material consumption, aligning with principles circular eco-economy facilitating carbon footprint mitigation. present study sets out compare different types influence on geopolymer reactivity, workability, performance. In order achieve this, analyses factors such Si/Al ratio, rheology, setting. addition, alkaline activators, additives, nanoparticles extrusion interlaminar cohesion printed geopolymers evaluated. These are key aspects industrial application. A bibliometric analysis was conducted, revealed growth research this field, highlighting advances optimized formulations, encapsulation hazardous CO2 capture, self-healing geopolymers. identified technical regulatory challenges scalability, emphasizing necessity standardize methodologies assess life cycle findings indicated that tailings-derived viable construction, applications pavements, prefabricated elements, materials resistant extreme environments. technology reduces waste promotes economy decarbonization construction industry.

Language: Английский

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Recycling and valorization of municipal solid waste incineration bottom ash via cold-bonded granulation technology – The role of fiber volume and fiber type

Construction and Building Materials, Journal Year: 2024, Volume and Issue: 442, P. 137427 - 137427

Published: July 30, 2024

Language: Английский

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