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Article

Fly Ash as an Ingredient in the Contaminated Soil Stabilization Process

Faculty of Environmental Engineering, Wroclaw University of Science and Technology, 27 Wybrzeże Wyspiańskiego St., 50-370 Wroclaw, Poland
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Academic Editors: Robert Oleniacz and Katarzyna Grzesik
Energies 2022, 15(2), 565; https://doi.org/10.3390/en15020565
Received: 24 December 2021 / Revised: 10 January 2022 / Accepted: 11 January 2022 / Published: 13 January 2022
Fly ash is the main by-product of coal combustion characterized by a large specific surface area. In addition to oxides, it also contains unburned coal and trace elements. This study aimed to investigate the possibility of using fly ash from pit-coal combustion (CFA) for the treatment of benzene-contaminated soil (S). The CFA was used as a mixture with Portland cement (PC) (70% PC + 30% CFA). The soil was treated with a PC-CFA mixture in amounts of 40, 60, and 80% of soil mass. During the process, the concentration of benzene was monitored with the flame-ionization detector. Produced monoliths (S+(PC-CFA)x) were tested for compressive strength and capillary water absorption. The experiment confirmed that the PC-CFA mixture limited benzene emission. The highest reduction in benzene concentration (34–39%) was observed for samples treated with the PC-CFA mixture in an amount of 80% (S+(PC-CFA)80). The average compressive strength of monoliths S+(PC-CFA)40, S+(PC-CFA)60, and S+(PC-CFA)80 was 0.57, 4.53, and 6.79 MPa, respectively. The water absorption values were in the range of 15–22% dm. View Full-Text
Keywords: hazardous waste; VOC; physicochemical stabilization; encapsulation; remediation hazardous waste; VOC; physicochemical stabilization; encapsulation; remediation
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MDPI and ACS Style

Banaszkiewicz, K.; Marcinkowski, T.; Pasiecznik, I. Fly Ash as an Ingredient in the Contaminated Soil Stabilization Process. Energies 2022, 15, 565. https://doi.org/10.3390/en15020565

AMA Style

Banaszkiewicz K, Marcinkowski T, Pasiecznik I. Fly Ash as an Ingredient in the Contaminated Soil Stabilization Process. Energies. 2022; 15(2):565. https://doi.org/10.3390/en15020565

Chicago/Turabian Style

Banaszkiewicz, Kamil, Tadeusz Marcinkowski, and Iwona Pasiecznik. 2022. "Fly Ash as an Ingredient in the Contaminated Soil Stabilization Process" Energies 15, no. 2: 565. https://doi.org/10.3390/en15020565

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