Utilization of Copper Flotation Tailings in Geopolymer Materials Based on Zeolite and Fly Ash DOI Open Access
Marija Štulović, Dragana Radovanović, Jelena Dikić

et al.

Materials, Journal Year: 2024, Volume and Issue: 17(24), P. 6115 - 6115

Published: Dec. 14, 2024

Copper flotation tailings (FTs), resulting from the separation and beneficiation processes of ores, are a significant source environmental pollution (acid mine drainage, toxic elements leaching, dust generation). The most common disposal method for this industrial waste is dumping. However, due to their favorable physical chemical properties—the high content aluminosilicate minerals (60–90%)—flotation can be effectively treated reused through geopolymerization technology, thereby adding value waste. objective study was evaluate potential utilizing FTs produce sustainable materials. Geopolymers based on natural zeolite (NZ), sodium-modified (NaZ), fly ash (FA) were prepared using 20%, 35%, 50% FTs, activated with 10 M NaOH solution. investigated influence Ca/Si, Si/Al, Na/Al molar ratios structural, thermal, mechanical properties (XRD, TG/DTG unconfined compressive strength, UCS), contaminant immobilization (TCLP method) geopolymers. Geochemical modeling via PHREEQC program employed interpret results. findings indicated that UCS decreased in zeolite-based geopolymers as FT increased inertness low calcium system (Ca/Si ≤ 0.3), contrast FA-based geopolymer. highest 44.3 MPa recorded an geopolymer containing tailings, optimal 0.4 3.0 1.1 Na/Al. In conclusion, process has been determined suitable technological approach treatment reuse FTs.

Language: Английский

Stabilization/solidification of nickel-containing electroplating sludge by sustainable geopolymer: Mechanism and applicability DOI
Jiahe Miao, Jian Wang, Chen Sun

et al.

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

Published: Feb. 7, 2025

Language: Английский

Citations

2
A technique for preparing one-part geopolymers by activating alkali-fused lithium slag with solid sodium silicate DOI

Xiaofeng Luo,

Liang Huang,

Linggang Wei

et al.

Construction and Building Materials, Journal Year: 2024, Volume and Issue: 435, P. 136817 - 136817

Published: May 31, 2024

Language: Английский

Citations

11
Experimental Study of Alkali-Activated Cementitious Materials Using Thermally Activated Red Mud: Effect of the Si/Al Ratio on Fresh and Mechanical Properties DOI Creative Commons

Kai Guo,

Haifeng Dong, Junyi Zhang

et al.

Buildings, Journal Year: 2025, Volume and Issue: 15(4), P. 565 - 565

Published: Feb. 12, 2025

Bayer red mud (RM)-based geopolymers are economical and ecofriendly alternatives to cement because of their superior performance. This study investigated alkali-activated cementitious materials by combining RM, fly ash (FA) slag, the mixtures were used produce composites. The influence Si/Al molar ratio (3.30–3.79) on initial properties (setting time flowability) hardened (compressive strength, drying shrinkage water permeability) composite was studied. Na2O content fixed at 4 wt%, thermal activation temperature 800 °C. phase evolution geopolymerization mechanism effect material FTIR, XRD, TG–DTG SEM–EDS. results M1.2Si333 indicated that compressive strength blends can reach 33.5 MPa 28 days, with a rate 1.20%. Compressive decreases, while increases higher ratio. Microstructural analyses revealed low alkali activator modulus enhance dissolution precursors form C–(A)–S–H gels, which increase strength. promoted application RM-based geopolymer-engineered enhanced resource efficiency bauxite residue.

Language: Английский

Citations

1
Activated nickel tailings for remediation of arsenic-contaminated soils: Tailings activation, leaching toxicity and passivation mechanisms DOI

Xuquan Huang,

Jun Tu, Haojie Wang

et al.

Journal of environmental chemical engineering, Journal Year: 2025, Volume and Issue: unknown, P. 115912 - 115912

Published: Feb. 1, 2025

Language: Английский

Citations

1
Microwave activated red mud-based geopolymer: Synergistic solid waste utilization and heavy metal immobilization mechanism DOI
Zhuo Liu, Rongxin Guo,

Chaoshu Fu

et al.

Construction and Building Materials, Journal Year: 2025, Volume and Issue: 470, P. 140564 - 140564

Published: March 5, 2025

Language: Английский

Citations

1
Green transformation of mining waste: Synergistic effects of coal mine drainage sludge and industrial by-products in high-performance geopolymer production and environmental benefits DOI
Wenxing Chen, Hongkai Zhu, Fang Liu

et al.

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

Published: March 12, 2025

Language: Английский

Citations

1
A Comprehensive Review on Mine Tailings as a Raw Material in the Alkali Activation Process DOI Creative Commons
Hamid Reza Manaviparast, Tiago Miranda, Eduardo Pereira

et al.

Applied Sciences, Journal Year: 2024, Volume and Issue: 14(12), P. 5127 - 5127

Published: June 12, 2024

The mining industry generates vast quantities of mine tailings on an annual basis. However, due to their limited economic value, a significant portion these are deposited close sites, often underwater. principal environmental apprehensions associated with revolve around elevated levels heavy metals and sulfidic minerals. oxidation minerals can lead the formation acid drainage, which in turn releases into nearby water systems. effective management tailing dams requires substantial financial investments for construction meticulous control. Consequently, pressing need exists stable, sustainable, economically viable approaches. One promising method addressing is through alkali activation, technique that serves as stabilization process. This approach yields robust, concrete-like structures by utilizing raw materials abundant aluminum silicon, conveniently constitute primary components residues. comprehensive review outlines research activation tailings. It delves reactivity chemical attributes diverse Numerous exhibit inadequate level under alkaline conditions, so various pre-treatment methodologies impacts mineralogy meticulously explored.

Language: Английский

Citations

4
Mechanics and microstructure analysis of geopolymer utilizing ilmenite tailing and metakaolin powder as alkali-activated materials DOI Creative Commons

Jingqiu Zeng,

Kaiqian Zhang,

Weiming Sun

et al.

Case Studies in Construction Materials, Journal Year: 2024, Volume and Issue: 21, P. e03567 - e03567

Published: July 24, 2024

Geopolymers derived from bulk solid waste are considered ideal substitutes for cement-based materials in developing environmentally friendly construction materials. The utilization of tailings powder as a precursor alkali activation geopolymer can enhance the mechanical characteristics geopolymer. This study conducted extensive experimental studies on compressive strength, flexural SEM microstructure, thermogravimetric curve, and variable influence alkali-activated ilmenite (IT) mortar, using liquid-solid ratio number variables. An analysis was mortar's characteristics, machine-learning properties. Furthermore, impact different atomic ratios structure mortars also examined. test results revealed that metakaolin-iron titanium geopolymer, when doped with 10 % tailings, exhibited strength 72.30 MPa at 14 days. Similarly, reached 4.76 days 30 tailings. XRD showed Magnesiohornblende particles Mg-F-A-S-H C-A-S-H gel had positive negative correlations, respectively, doping level. TG indicated specimens exhibit enhanced thermal stability following treatment combining metakaolin formed Me-(F)-A-S-H gels. examination surface porosity, pore shape, unreacted material determined adding increased Si/Al Fe/Si ratios, enhancing transformation lamellar to three-dimensional disordered mesh structure. Additionally, contributed significant amount Ca, elevating Ca/Na (0.1−0.6) triggering calcium precipitation within Ca/Si range 0.03−0.2. increase led decrease sample's curing time extended. Based prior research application Gray Wolf optimization algorithm extreme learning, clear correlation identified between strength. increasing geopolymer's while an extended negatively correlated mixing deemed insignificant did not exceed 20 %. may derive environmental industrial benefits improvement their properties, stability, machine learning.

Language: Английский

Citations

4
Research on leaching kinetics and reactivity evaluation of copper tailings as precursor for alkali-activated materials DOI Creative Commons
Hao Liu, Yang Zhang, Conglin Chen

et al.

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

Citations

4
Fluorinated silane induced zincophilic-hydrophobic interface for stable Zn anode DOI
Dan Zhang, Xianguang Zeng, Chengyan Wen

et al.

Surfaces and Interfaces, Journal Year: 2025, Volume and Issue: 56, P. 105734 - 105734

Published: Jan. 1, 2025

Language: Английский

Citations

0