Effectiveness of industrial wastes-based geopolymers in improving the durability of stabilized/solidified heavy metal polluted soil

Document Type : Original Research

Authors
S. Ghaffary 1
A. R. Goodarzi 2
S. Sobhan ardakani 3
M. Cheraghi 3
R. Marandi 4
1 Department of Environment, College of Basic Sciences, Hamedan Branch, Islamic Azad University, Hamedan, Iran
2 Department of Civil Engineering, College of Engineering, Hamedan Branch, Islamic Azad University, Hamedan, Iran
3 Department of the Environment, College of Basic Sciences, Hamedan Branch, Islamic Azad University, Hamedan, Iran
4 Department of the Environment, College of Marine Sciences and Technology, North Tehran Branch, Islamic Azad University, Tehran, Iran
10.22034/24.1.161
Abstract
The cement-based stabilization/solidification (S/S) method is widely used in modifying soils polluted by heavy metals (HMs), although it may face technical, economic, and environmental limitations. Therefore, the present work was designed to investigate the effectiveness of a type of geopolymer based on the steel slag (SGP) and its combination with microparticles of zeolite (SGPZ), compared to cement (as a traditional additive), in enhancing the stability of S/S products. In so doing, different percentages (0 to 250 mg/g-soil) of SGP, SGPZ, and sole cement were separately added to the S/S samples containing different concentrations of lead (including 5000, 10000, 20000 and 40000 mg/kg-soil). After adequate curing (up to 28 days), a set of macro and micro scale experiments were performed to assess the long-term performance of the amended soil samples using a laboratory accelerated aging procedure that simulated 25, 50, 75 and 100 years of exposure to the acid rain and wet and dry (W-D) cycles in the field. It was found that, while low amounts of cement (PC) would greatly reduce the initial bioavailability of pollution in the pore fluid of soil, increasing the contact time of the PC-treated specimens upon harsh conditions, especially in the presence of high level of Pb, would dramatically diminish the efficiency of the precipitation mechanism as well as the degree of encapsulation process which play a significant role in increasing the ability of S/S sample to release the toxic ions stabilized/solidified previously. At simulated 100 years, the toxicity characteristic leaching procedure leached Pb from the PC-treated sample with 250 mg/g-soil binder would exceed the permitted threshold of pollution leaching (≥ 5 mg/L) by 508%, indicating that meeting the S/S regulation limits requires a large consumption of cement. The study showed that, unlike treatment conditions with the same level of PC, the use of novel cement-free S/S binders (especially SGPZ) would significantly limit the negative influences of the environmental changes on HM remobilization risks. In addition, the mechanical characteristics of those series of samples were sometimes up to 1.4 times higher than that of the soil modified with cement alone. Based on the X-ray diffraction (XRD) patterns and scanning electron microscope (SEM) images, this enhancement can be mainly due to i) reduction in the adverse HM-binder interactions, ii) intensification in the level of hydration reactions, iii) formation of secondary complex hydrated phases (e.g., Hydrotalcite: Mg6Al2CO3(OH)16.4H2O), and iv) creation of a three-dimensional network of solidification in the system containing geopolymer, wrapping the matrix of S/S products against the structure disintegration upon contact to the aggressive environments. Therefore, under the destroying impacts of acid attack and W-D scenario, adding 25% SGPZ composite could pass the S/S regulation limits. In general, based on the obtained results, the use of geopolymer (especially containing zeolite) is suggested as an effective and environmentally friendly alternative for sustainable soil improvement, even with the high contents of HM ions. Following the USEPA and UKAE standards to achieve the safe S/S performance, the optimal dosage of GP binder was determined to be approximately 6 mg/g-soil per 1 g/kg of lead in the sample.

Keywords

Subjects

1. Chen, L., Nakamura, K., Hama, T.; "Review on stabilization/solidification methods and mechanism of heavy metals based on OPC-based binders"; Journal of Environmental Management, 332, 2023, 117362.
2. Fu, T., Zhang, B., Gao, X., Cui, S., Guan, C. Y., Zhang, Y., ... & Peng, Y.; "Recent progresses, challenges, and opportunities of carbon-based materials applied in heavy metal polluted soil remediation"; Science of The Total Environment, 856, 2023, 158810.
3. Kada, K., Abdi, A., Djelloul Sayah, Z. B., Akretche, D. E., Rafai, S., Lahmar, H., Benamira, M.; "Modeling and optimizing by the response surface methodology of the Pb (II)-removing effectiveness from a soil by electrokinetic remediation"; Soil and Sediment Contamination: An International Journal, 32, 2023, 305-319.
4. Long, L., Zhao, Y., Lv, G., Duan, Y., Liu, X., Jiang, X.; "Improving stabilization/solidification of MSWI fly ash with coal gangue based geopolymer via increasing active calcium content"; Science of The Total Environment, 854, 2023, 158594.
5. Ren, Z., Wang, L., Wang, H., Liu, S., Liu, M.; "Solidification/stabilization of lead-contaminated soils by phosphogypsum slag-based cementitious materials"; Science of The Total Environment, 857, 2023, 159552.
6. Liu, J., Wu, D., Tan, X., Yu, P., Xu, L.; "Review of the Interactions between Conventional Cementitious Materials and Heavy Metal Ions in Stabilization/Solidification Processing"; Materials, 16, 2023, 3444.
7. Su, Y., Luo, B., Luo, Z., Xu, F., Huang, H., Long, Z., Shen, C.; " Mechanical characteristics and solidification mechanism of slag/fly ash-based geopolymer and cement solidified organic clay: A comparative study"; Journal of Building Engineering, 71, 2023, 106459.
8. Tyagi, S., Annachhatre, A. P.; "A review on recent trends in solidification and stabilization techniques for heavy metal immobilization"; Journal of Material Cycles and Waste Management, 2023, 1-25.
9. Ouhadi, V. R., Yong, R. N., Deiranlou, M.; "Enhancement of cement-based solidification/stabilization of a lead-contaminated smectite clay"; Journal of Hazardous Materials, 403, 2021, 123969.
10. Ren, Z., Wang, L., Wang, H., Liu, S., Ren, J.; "Stabilization and solidification mechanism of Pb in phosphogypsum slag-based cementitious materials"; Construction and Building Materials, 368, 2023, 130427.
11. Yang, Z., Zhang, K., Li, X., Ren, S., & Li, P.; "The effects of long-term freezing-thawing on the strength properties and the chemical stability of compound solidified/stabilized lead-contaminated soil"; Environmental Science and Pollution Research, 30, 2023, 38185-38201.
12. Goodarzi, A.R., Movahedrad, M.; "Stabilization/solidification of zinc-contaminated kaolin clay using ground granulated blast-furnace slag and different types of activators"; Applied geochemistry, 81, 2017, 155-165.‌
13. Jiang, Q., He, Y., Wu, Y., Dian, B., Zhang, J., Li, T., Jiang, M. ; "Solidification/stabilization of soil heavy metals by alkaline industrial wastes: A critical review"; Environmental Pollution, 2022, 120094.
14. Sun, C., Ge, W., Zhang, Y., Wang, L., Xia, Y., Lin, X., and Yan, J.; "Designing low-carbon cement-free binders for stabilization/solidification of MSWI fly ash"; Journal of Environmental Management, 339, 2023, 117938..
15. Su, Y., Luo, B., Luo, Z., Xu, F., Huang, H., Long, Z., Shen, C.; "Mechanical characteristics and solidification mechanism of slag/fly ash-based geopolymer and cement solidified organic clay: A comparative study"; Journal of Building Engineering, 71, 2023, 106459.
16. Naidu, T. S., Sheridan, C. M., van Dyk, L. D.; "Basic oxygen furnace slag: Review of current and potential uses"; Minerals Engineering, 149, 2020, 106234.
17. Movahedrad, M., Goodarzi, A. R., Salimi, M.; "Effect of basic oxygen furnace slag incorporation into calcium-based materials on solidification/stabilization of a zinc-contaminated kaolin clay"; Environmental Earth Sciences, 81, 2022, 1-19.
18. Zhang, Y., Ong, Y.J., Yi, Y.; "Comparison between CaO-and MgO-activated ground granulated blast-furnace slag (GGBS) for stabilization/solidification of Zn-contaminated clay slurry"; Chemosphere, 286, 2022, 131860.
19. Wang, P., Li, J., Hu, Y., Cheng, H.; "Solidification and stabilization of Pb-Zn mine tailing with municipal solid waste incineration fly ash and ground granulated blast-furnace slag for unfired brick fabrication"; Environmental Pollution, 2023, 121135.
20. Ok, Y. S., Yang, J. E., Zhang, Y. S., Kim, S. J., Chung, D. Y.; "Heavy metal adsorption by a formulated zeolite-Portland cement mixture"; Journal of Hazardous Materials, 147, 2007, 91-96.
21. Duan, Y., Liu, X., Zheng, L., Khalid, Z., Long, L., Jiang, X.; "MgO-based binders with different formulations for solidifying Pb and Cd in MSWI fly ash: solidification effect and related mechanisms"; Process Safety and Environmental Protection, 175, 2023, 160-167.
22. Rozbahani, M., Goodarzi, A. R., Lajevardi, S. H.; "Coupling effect of superfine zeolite and fiber on enhancing the long-term performance of stabilized/solidified Pb-contaminated clayey soils"; Environmental Science and Pollution Research, 30, 2023, 1-16.
23. Zhang, X., Wang, B., Chang, J., Fan, C., Liu, Z.; "Effect of zeolite contents on mineral evolution and heavy metal solidification in alkali-activated MSWI fly ash specimens"; Construction and Building Materials, 345, 2022, 128309.
24. Goodarzi, A.R., Zandi, M. H. ; "Assessing geo-mechanical and leaching behavior of cement-silica-fume-stabilized heavy metal-contaminated clayey soil"; Environmental Earth Sciences, 75, 2016, 1-17.
25. Ramadan, M., Habib, A. O., Hazem, M. M., Amin, M. S., Mohsen, A.; "Synergetic effects of hydrothermal treatment on the behavior of toxic sludge-modified geopolymer: Immobilization of cerium and lead, textural characteristics, and mechanical efficiency"; Construction and Building Materials, 367, 2023, 130249.
26. Shilar, F. A., Ganachari, S. V., Patil, V. B., Khan, T. Y., Dawood, S.; "Molarity activity effect on mechanical and microstructure properties of geopolymer concrete: A review"; Case Studies in Construction Materials, 2022, e01014.
27. Bahmani, H., Mostofinejad, D.; "A review of engineering properties of ultra-high-performance geopolymer concrete"; Developments in the Built Environment, 14, 2023, 100126.
28. Asghar, R., Khan, M. A., Alyousef, R., Javed, M. F., Ali, M.; "Promoting the green construction: Scientometric review on the mechanical and structural performance of geopolymer concrete"; Construction and Building Materials, 368, 2023, 130502.
29. Wang, Z., Wei, B., Wu, X., Zhu, H., Wang, Q., Xiong, Z., Ding, Z. ; "Effects of dry-wet cycles on mechanical and leaching characteristics of magnesium phosphate cement-solidified Zn-contaminated soils"; Environmental Science and Pollution Research, 28, 2021, 18111-18119..
30. Shen, Z., Pan, S., Hou, D., O'Connor, D., Jin, F., Mo, L., ... Alessi, D. S.; "Temporal effect of MgO reactivity on the stabilization of lead contaminated soil"; Environment International, 131, 2019, 104990.
31. Du, Y. J., Wu, J., Bo, Y. L., Jiang, N. J. ; "Effects of acid rain on physical, mechanical and chemical properties of GGBS-MgO-solidified/stabilized Pb-contaminated clayey soil"; Acta Geotechnica, 15, 2020, 923-932.
32. Zha, F., Liu, C., Kang, B., Yang, X., Zhou, Y., Yang, C. ; "Acid rain leaching behavior of Zn-contaminated soils solidified/stabilized using cement-soda residue"; Chemosphere, 281, 2021, 130916.
33. Zhang, Y., Lu, X., Yu, R., Li, J., Miao, J., Wang, F.; "Long-term leachability of Sb in smelting residue stabilized by reactive magnesia under accelerated exposure to strong acid rain"; Journal of Environmental Management, 301, 2022, 113840.
34. Safa, M., Goodarzi, A. R., Lorestani, B.; "Enhanced post freeze-thaw stability of Zn/Pb co-contaminated soil through MgO-activated steel slag and fiber treatment"; Cold Regions Science and Technology, 210, 2023, 103826.
35. ASTM;"Annual book of ASTM standards. vol. 04.08";American Society for Testing and Materials, 2006, Philadelphia.
36. EPA;"Process design manual: land application of municipalsludge"; Res. Lab. EPA-625/1-83-016, 1983.
37. Wang, F., Xu, J., Yin, H., Zhang, Y., Pan, H., Wang, L.; "Sustainable stabilization/solidification of the Pb, Zn, and Cd contaminated soil by red mud-derived binders"; Environmental Pollution, 284, 2021, 117178.
38. Wu, H. L., Jin, F., Bo, Y. L., Du, Y. J., Zheng, J. X.; "Leaching and microstructural properties of lead contaminated kaolin stabilized by GGBS-MgO in semi-dynamic leaching tests"; Construction and building materials, 172, 2018, 626-634.
39. Zhang, W. L., Zhao, L. Y., McCabe, B. A., Chen, Y. H., Morrison, L. ; "Dredged marine sediments stabilized/solidified with cement and GGBS: Factors affecting mechanical behaviour and leachability"; Science of The Total Environment, 733, 2020, 138551.
40. Goodarzi, A. R., Salimi, M.; "Stabilization treatment of a dispersive clayey soil using granulated blast furnace slag and basic oxygen furnace slag"; Applied Clay Science, 108, 2015, 61-69.
41. Kaya, M., Koksal, F., Gencel, O., Munir, M. J., Kazmi, S. M. S.; "Influence of micro Fe2O3 and MgO on the physical and mechanical properties of the zeolite and kaolin based geopolymer mortar"; Journal of building Engineering, 52, 2022, 104443.
42. Ji, Z., Pei, Y.; "Bibliographic and visualized analysis of geopolymer research and its application in heavy metal immobilization: A review"; Journal of environmental management, 231, 2019, 256-267.
43. Özbayrak, A., Kucukgoncu, H., Aslanbay, H. H., Aslanbay, Y. G., Atas, O.; "Comprehensive experimental analysis of the effects of elevated temperatures in geopolymer concretes with variable alkali activator ratios"; Journal of Building Engineering, 68, 2023, 106108.
44. Singh, R. P., Reddy, P. S., Vanapalli, K. R., Mohanty, B. ; "Influence of binder materials and alkali activator on the strength and durability properties of geopolymer concrete: A review"; Materials Today: Proceedings, 2023.
45. Anburuvel, A. ; "The role of activators in geopolymer-based stabilization for road construction: a state-of-the-art review"; Multiscale and Multidisciplinary Modeling, Experiments and Design, 2023, 1-19.
46. Bai, Y., Guo, W., Zhao, Q., Zhang, N., Xue, C., Wang, S., & Song, Y.; "Performance deterioration of municipal solid waste incineration fly ash-based geopolymer under sulfuric acid attack"; Construction and Building Materials, 391, 2023, 131847.
47. Sharma, K., Kumar, A.; "Utilization of industrial waste-based geopolymers as a soil stabilizer-a review"; Innovative Infrastructure Solutions, 5, 2020, 1-20.
48. Liu, T., Li, S., Chen, Y., Brouwers, H. J. H., Yu, Q.; "In-situ formation of layered double hydroxides in MgO-NaAlO2-activated GGBS/MSWI BA: Impact of Mg2+ on reaction mechanism and leaching behavior"; Cement and Concrete Composites, 140, 2023, 105114.
49. MolaAbasi, H., Saberian, M., Li, J.; "Prediction of compressive and tensile strengths of zeolite-cemented sand using porosity and composition"; Construction and Building Materials, 202, 2019, 784-795.
50. Safa, M., Goodarzi, A.R., and Lorestani, B.; "Effect of zeolite and fibers on the geo-mechanical properties of cemented soil under the freeze-thaw cycles"; Modares Civil Engineering journal, 22, 2022, 1-16. (In Persian).
51. Shen, Z., Hou, D., Xu, W., Zhang, J., Jin, F., Zhao, B., ... and Alessi, D. S. ; "Assessing long-term stability of cadmium and lead in a soil washing residue amended with MgO-based binders using quantitative accelerated ageing"; Science of the total environment, 643, 2018, 1571-1578.
52. Zhao, X. Y., Yang, J. Y., Ning, N., Yang, Z. S.; "Chemical stabilization of heavy metals in municipal solid waste incineration fly ash: A review"; Environmental Science and Pollution Research, 29, 2022, 40384-40402.
53. Suzuki, T., Nakamura, A., Niinae, M., Nakata, H., Fujii, H., Tasaka, Y.; "Lead immobilization in artificially contaminated kaolinite using magnesium oxide-based materials: Immobilization mechanisms and long-term evaluation"; Chemical engineering journal, 232, 2013, 380-387.
54. Li, Q., Zhong, Z., Du, H., Zheng, X., Zhang, B., Jin, B. (2022) .; "Co-pyrolysis of sludge and kaolin/zeolite in a rotary kiln: Analysis of stabilizing heavy metals"; Frontiers of Environmental Science & Engineering, 16, 2022, 1-13.
Modares Civil Engineering journal
Volume 24, Issue 1
March and April 2024
Pages 161-178