Research on leaching kinetics and reactivity evaluation of copper tailings as precursor for alkali-activated materials
Source abstract
Abstract
Copper tailings are by-products of copper mining, and because of their rich content of SiO2 and Al2O3, it is considered as a possible raw material for the preparation of geopolymer composites. In this paper, the leaching kinetics and reactivity of reactive elements Si and Al in copper tailings under alkali hydrothermal environment are investigated, and the reasons for the difference in reactivity between copper tailings and granulated blast furnace slag (GBFS), fly ash (FA) are also introduced. The results show that the leached Si and Al in the precursor materials are involved in the formation of N/C-A-S-H. Similar to FA and GBFS, the leaching behavior of reactive elements in copper tailings is mainly controlled by the diffusion behavior through the surface product layer. Additionally, the activation energy of Al in the precursor materials is lower than that of Si, which makes the Al-O bond easier to break in alkaline environment, thus causing the leaching rate of Al in the raw materials to be higher than that of Si. Meanwhile, the activation energies of Si and Al in copper tailings are 69.29 kJ/mol and 33.91 kJ/mol, respectively, and higher elemental activation energy makes the efficiency of elemental dissolution lower, which is also the main reason for the lower reactivity of copper tailings. This study aims to elucidate the interrelationships between physicochemical properties, leaching behavior and reactivity of copper tailings.
Source: openalex_inverted_index · Quality: baseline
Research context
OpenAlex topics: Concrete and Cement Materials Research · Magnesium Oxide Properties and Applications · Nuclear materials and radiation effects
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
References (43)
Show source-provided references
1. A framework for a sustainable approach to mine tailings management: disposal strategies10.1016/j.jclepro.2015.07.139 ↗
2. Micro-assessment of heavy metal immobilization within alkali-activated copper tailings-slag geopolymer10.1016/j.cemconcomp.2024.105510 ↗
3. Experimental assessment of utilizing copper tailings as alkali-activated materials and fine aggregates to prepare geopolymer composite10.1016/j.conbuildmat.2023.133751 ↗
4. The factors influencing sludge incineration residue (SIR)-based magnesium potassium phosphate cement and the solidification/stabilization characteristics and mechanisms of heavy metals10.1016/j.chemosphere.2020.127789 ↗
5. Mine tailings-based geopolymers: a comprehensive review10.1016/j.ceramint.2022.05.345 ↗
6. Recycling of phosphate mine tailings for the production of geopolymers10.1016/j.jclepro.2018.03.094 ↗
7. Strength and durability characteristics of copper tailing concrete10.1016/j.conbuildmat.2013.07.075 ↗
8. Selective recovery of chromium from ferronickel slag via alkaline roasting followed by water leaching10.1016/j.jhazmat.2019.04.002 ↗
9. Strain-hardening alkali-activated fly ash/slag composites with ultra-high compressive strength and ultra-high tensile ductility10.1016/j.cemconres.2022.107075 ↗
10. The role of environmental conditions on the carbonation of an alkali-activated cementitious waste form10.1016/j.cemconres.2021.106645 ↗
11. Co-modifying geopolymer composite by nano carbon black and carbon fibers to reduce CO2 emissions in airport pavement induction heating10.1016/j.compositesa.2023.107951 ↗
12. Controlling electromagnetic and mechanical behaviors of geopolymer matrix with nano-SiO2@Fe3O4 magnetofluid for soft magnetic applications10.1016/j.cemconcomp.2023.105370 ↗
13. High-temperature behavior of polyvinyl alcohol fiber-reinforced metakaolin/fly ash-based geopolymer mortar10.1016/j.compositesb.2022.110171 ↗
14. A critical review on modeling and prediction on properties of fresh and hardened geopolymer composites
15. Understanding the role of epoxy resin and polyurethane in toughening metakaolin-based geopolymer matrix
16. Geopolymerisation kinetics. 2. Reaction kinetic modelling10.1016/j.ces.2007.01.028 ↗
17. Quantitative and qualitative assessment of the amorphous phase of a Class F fly ash dissolved during alkali activation reactions – effect of mechanical activation, solution concentration and temperature10.1016/j.compositesb.2016.08.001 ↗
18. Effect of temperature and alkaline concentration on metakaolin leaching kinetics10.1016/j.ceramint.2014.02.071 ↗
19. Quantification of the degree of reaction of fly ash10.1016/j.cemconres.2010.07.004 ↗
20. Reaction behaviour of Al2O3 and SiO2 in high alumina coal fly ash during alkali hydrothermal process10.1016/S1003-6326(15)63816-X ↗
21. Kinetics of electric arc furnace slag leaching in alkaline solutions10.1016/j.conbuildmat.2016.01.038 ↗
22. Effects of a red mud mineralogical composition versus calcination on its pozzolanicity10.1016/j.conbuildmat.2023.133238 ↗
23. Leaching kinetics and reactivity regulation of red mud in an NaOH solution10.1016/j.conbuildmat.2024.135750 ↗
24. Leaching kinetics and reactivity evaluation of ferronickel slag in alkaline conditions10.1016/j.cemconres.2020.106202 ↗
25. Geopolymers, inorganic polymers, alkali-activated materials and hybrid binders from bauxite residue (red mud) – Putting things in perspective10.1016/j.jclepro.2020.120610 ↗
26. Electromagnetic and mechanical properties of FA-GBFS geopolymer composite used for induction heating of airport pavement10.1016/j.cemconcomp.2022.104503 ↗
27. Influencing factors analysis and optimized prediction model for rheology and flowability of nano-SiO2 and PVA fiber reinforced alkali-activated composites10.1016/j.jclepro.2022.132988 ↗
28. Reaction kinetics of red mud-fly ash based geopolymers: Effects of curing temperature on chemical bonding, porosity, and mechanical strength10.1016/j.cemconcomp.2018.07.008 ↗
29. Effects of alkaline activators on pore structure and mechanical properties of ultrafine metakaolin geopolymers cured at room temperature10.1016/j.conbuildmat.2022.129678 ↗
30. Regulation of the composition of metakaolin-based geopolymer: effect of zeolite crystal seeds
31. Interfacial characteristics and mechanical behavior of geopolymer stabilizers with clay mineral: a molecular dynamics study10.1016/j.clay.2024.107286 ↗
32. Electromagnetic and mechanical properties of soft magnetic cement composite for airport runway induction heating: experimental and simulation analyses10.1016/j.jclepro.2021.130141 ↗
33. Role of carbon fiber in the electrothermal behavior and geopolymerization process of carbon fiber-reinforced FA-GBFS geopolymer composite10.1016/j.conbuildmat.2023.130597 ↗
34. Effect of PVA fiber on properties of geopolymer composites: A comprehensive review10.1016/j.jmrt.2024.02.151 ↗
35. Properties of road subbase materials manufactured with geopolymer solidified waste drilling mud10.1016/j.conbuildmat.2024.136509 ↗
36. Advances in understanding alkali-activated materials10.1016/j.cemconres.2015.04.013 ↗
37. Re-examining the suitability of high magnesium nickel slag as precursors for alkali-activated materials10.1016/j.conbuildmat.2019.04.063 ↗
38. Leaching kinetics and mechanism of alunite from alunite tailings in highly concentrated KOH solution10.1016/j.hydromet.2017.09.008 ↗
39. The mechanism of dissolution of minerals in acidic and alkaline solutions: Part II Application of a new theory to silicates, aluminosilicates and quartz10.1016/j.hydromet.2014.07.003 ↗
40. The setting and hardening of geopolymer concrete based on low-field nuclear magnetic resonance and cyclic voltammetry methods10.1016/j.conbuildmat.2024.135471 ↗
41. Review on the impact of metakaolin-based geopolymer's reaction chemistry, nanostructure and factors on its properties10.1016/j.conbuildmat.2023.134760 ↗
42. Performance of geopolymer concrete at elevated temperature − a critical review10.1016/j.conbuildmat.2024.135578 ↗
43. Performance and heavy metal leaching of porous geopolymer based on solid wastes10.1016/j.conbuildmat.2024.136186 ↗