Characterization of red mud and fly ash based for co-curing of Cu2+-contaminated soil
Source abstract
Abstract
Currently, solid waste accumulates significantly, including red mud (RM) and fly ash (FA). Meanwhile, traditional cement-based curing agents pose challenges due to their high energy consumption and substantial pollution during the remediation of heavy metal-contaminated soil. In light of the need for resource utilization of solid waste and demands for energy conservation and emission reduction, this study investigates the stabilization/solidification of Cu2+-contaminated loess using a novel curing agent. This agent comprises low-energy, environmentally friendly high-belite sulfoaluminate cement (HBSAC) and quicklime (CaO) mixed with RM and FA. The study evaluates the samples across various metrics, including mechanical properties, permeability, pH, conductivity, leached ion concentration, and microstructure, to systematically investigate the curing effect and mechanism of the new curing agent on contaminated soil. It conducts an assessment related to the economics and carbon emissions of the solidified body. The results show that the optimal ratio for the curing agent consists of RM and FA, CaO, and HBSAC at 20%, 5%, and 7%, respectively, with a water-to-solid ratio of 0.38 and a mass ratio of RM to FA at 13:2. This new curing agent not only possesses superior properties but also offers excellent economic benefits and reduces carbon emissions. It holds significant potential for applications in the remediation of Cu2+-contaminated soils.
Source: openalex_inverted_index · Quality: baseline
Research context
OpenAlex topics: Bauxite Residue and Utilization · Concrete and Cement Materials Research · Recycling and utilization of industrial and municipal waste in materials production
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
References (66)
Show source-provided references
1. National soil pollution survey bulletin · China Environ. Prot. Ind. · 2014 · 10
2. Advances in solidification/stabilization of heavy metal industrial contaminated sites
3. Blended cements in North America—a review10.1016/0958-9465(95)95757-Q ↗
4. Engineering properties and microstructural characteristics of cement-stabilized zinc-contaminated kaolin10.1139/cgj-2013-0177 ↗
5. Influence of chloride solutions on the leaching of heavy metals from cement hydrates10.1016/j.conbuildmat.2023.131108 ↗
6. Bauxite residue issues: II. options for residue utilization10.1016/j.hydromet.2011.02.007 ↗
7. Natural evolution of alkaline characteristics in bauxite residue10.1016/j.jclepro.2016.12.125 ↗
8. Sustainable utilization of bauxite residue (Red Mud) as a road material in pavements: A critical review10.1016/j.conbuildmat.2020.121419 ↗
9. Regional CO2 accounting and market layout of incinerator fly ash management in China10.1016/j.scitotenv.2023.163336 ↗
10. Increasing mercury risk of fly ash generated from coal-fired power plants in China10.1016/j.jhazmat.2022.128296 ↗
11. Red mud-enhanced magnesium phosphate cement for remediation of Pb and As contaminated soil10.1016/j.jhazmat.2020.123317 ↗
12. Influence and microscopic mechanism of the solid waste-mixture on solidification of Cu2+-contaminated soil10.1016/j.conbuildmat.2021.124651 ↗
13. Preparation and properties of sintering red mud unburned road brick using orthogonal experiments10.1016/j.conbuildmat.2019.117739 ↗
14. Effect and mechanism of nano-alumina on early hydration properties and heavy metals solidification/stabilization of alkali-activated MSWI fly ash solidified body10.1016/j.jhazmat.2023.131327 ↗
15. Fly ash treatment by desalination couples with solidification of heavy metals10.1016/j.psep.2023.01.066 ↗
16. Migration, solidification/stabilization mechanism of heavy metal in lightweight ceramisite from co-sintering fly ash and electrolytic manganese residue10.1016/j.psep.2023.03.047 ↗
17. Study on mechanism of chemical activation for minerals of high belite-calcium sulfoaluminate clinker
18. Study on the properties of high berylite cement
19. Optimization of mineral composition of high-belite sulfoaluminate clinker
20. Alkali-activated materials10.1016/j.cemconres.2017.02.009 ↗
21. Technical and commercial progress in the adoption of geopolymer cement10.1016/j.mineng.2011.09.009 ↗
22. Carbon and air pollutant emissions from China's cement industry 1990–2015: trends, evolution of technologies, and drivers10.5194/acp-21-1627-2021 ↗
23. Synthesis and characterization of geopolymer from Bayer red mud with thermal pretreatment10.1111/jace.12840 ↗
24. Red mud-metakaolin based cementitious material for remediation of arsenic pollution: Stabilization mechanism and leaching behavior of arsenic in lollingite10.1016/j.jenvman.2021.113715 ↗
25. GB 15618-2018
26. Beijing Geotechnical Engineering Association, T/BGEA 001–2019, Technical Standards for Pre mixed Fluidized Solidified Soil Filling Engineering, Beijing, China Construction Industry Press, 2019.
27. A. International, ASTM D4219, Test Method for Unconfined Compressive Strength Index of Chemical Grouted Soils. ASTM International, West Conshohocken, PA, 2008.
28. Ministry of Ecology and Environment of the People's Republic of China, HJ 802–2016，National Environmental Protection Standard of the People's Republic of China: Determination of Soil Conductivity by Electrode Method, Beijing, China Environmental Science Press, 2016.
29. A. International, ASTM D4972–19, Standard Test Methods for pH of Soils Internet, ASTM International, West Conshohocken, PA, 2019.
30. Ministry of Ecology and Environment of the People's Republic of China, HJ/T 299–2007. Solid waste-Extraction procedure for leaching toxicity-Sulphuric acid & nitric acid method, Beijing, China Environmental Science Press, 2007.
31. A. International, ASTM D5084, Standard test methods for measurement of hydraulic conductivity of saturated porous materials using a flexible wall permeameter. ASTM International, West Conshohocken, PA, 2016.
32. Identifying main factors of capacity fading in lithium ion cells using orthogonal design of experiments10.1016/j.apenergy.2015.11.014 ↗
33. Comparison of heavy metal removals from aqueous solutions by chemical precipitation and characteristics of precipitates10.1016/j.jwpe.2018.11.003 ↗
34. New phosphate-based binder for stabilization of soils contaminated with heavy metals: leaching, strength and microstructure characterization10.1016/j.jenvman.2014.07.035 ↗
35. Research on the mechanical properties and microstructure of fly ash-based geopolymers modified by molybdenum tailings10.1016/j.conbuildmat.2023.131530 ↗
36. Screening and assessment of solidification/stabilization amendments suitable for soils of lead-acid battery contaminated site10.1016/j.jhazmat.2015.02.015 ↗
37. Experimental study on red mud cured fly ash
38. A high-strength red mud–fly ash geopolymer and the implications of curing temperature10.1016/j.powtec.2023.118242 ↗
39. Agency · 1986
40. The influence of interference effects on the mechanical, microstructural and fixation characteristics of cement-solidified hazardous waste forms10.1016/S0304-3894(96)01806-7 ↗
41. National Standard of the People's Republic of China, GB 50164–2011, Concrete Quality Control Standard, Beijing, China Academy of Building Sciences, 2011. [46].
42. Fundamental units of real quadratic fields of odd class number10.1016/j.jnt.2013.10.019 ↗
43. Effect of gypsum on the hydration and strength of C3S pastes10.1111/j.1151-2916.1976.tb10935.x ↗
44. Institute of standard quota for the Ministry of construction, RISN-TG003–2007. Technical guidelines for application of soil stabilizer, Beijing,China Architecture and Building Press, 2008.
45. Acidification and alkalinization pretreatments of biowastes and their effect on P solubility and dynamics when placed in soil10.1016/j.jenvman.2023.117447 ↗
46. Modified granulation of red mud by weak gelling and its application to stabilization of Pb10.1016/j.jhazmat.2012.05.046 ↗
47. General Administration of Environmental Protection of the People's Republic of China, GB 5085.1–2007, Identification standards for hazardous wastes-Identification for corrosivity, China Environmental Science Press, 2007.
48. Effect of soil organic matter, electrical conductivity and sodium adsorption ratio on tensile strength of aggregates10.1016/S0167-1987(00)00086-6 ↗
49. Soil texture affects the conversion factor of electrical conductivity from 1: 5 soil-water to saturated paste extracts10.1016/j.pedsph.2022.06.023 ↗
50. Red mud and fly ash for remediation of mine sites contaminated with As, Cd, Cu, Pb and Zn10.1016/j.jhazmat.2005.10.043 ↗
51. Ministry of Environmental Protection of the People’s Republic of China, GB 5085.3–2007 Identification Standards for Hazardous Wastes—Identification for Extraction Toxicity, China Environmental Science Press, Beijing, 2007.
52. Discussion on the action duality of ettringite and it's causing condition in concrete
53. Investigation on red mud and fly ash-based geopolymer: quantification of reactive aluminosilicate and derivation of effective Si/Al molar ratio
54. Study on mechanism of chemical activation for minerals of high belite-calcium sulfoaluminate clinker
55. Utilization of size-fractionated pozzolanic bottom ash to immobilize heavy metals in MSW incinerator fly ash10.1016/j.jece.2023.110394 ↗
56. Na2SO4 modified low-carbon cementitious binder containing commercial low-reactivity metakaolin for heavy metal immobilization: Mechanism of physical encapsulation and chemical binding
57. Geopolymers in construction-recent developments10.1016/j.conbuildmat.2020.120472 ↗
58. Evaluation of red mud based binder for the immobilization of copper, lead and zinc10.1016/j.envpol.2020.114416 ↗
59. Carbon footprinting’: towards a universally accepted definition10.4155/cmt.10.39 ↗
60. Cleaner production in a small lime factory by means of process control10.1016/j.jclepro.2010.03.019 ↗
61. Lime in the limelight10.1016/j.jclepro.2014.12.047 ↗
62. Research on carbon footprint factors of building fossil energy
63. State Administration for Market Regulation, Standardization Administration of the People's Republic of China, GB16780–2021. The norm of energy consumption per unit product of cement, Beijing, Standards Press of China, 2007.
64. Introduction to the national standard for energy consumption quota per unit product of cement (GB16780-2021)
65. The impact of online education on carbon emissions in the context of the COVID-19 pandemic–Taking Chinese universities as examples10.1016/j.apenergy.2022.118875 ↗
66. Comparative study on mechanical properties of new polymer curing materials and cement-reinforced loess