Fly ash plastering mortar: heavy metal leaching rule, coupling mechanism and life cycle carbon reduction

• Autorzy: Wang Chao-qiang , Cheng Lin-xiao , Liu Ke

Identyfikatory

DOI

10.1007/s43452-023-00849-7

• Języki publikacji: EN

Abstrakty

EN

The application range of fly ash in mortar products is gradually expanding, and the harm of heavy metals and environmental damage are also deepening. This study centers around the plastering mortar prepared from fly ash from three provinces in southwestern China (FA1 in Sichuan, FA2 in Chongqing, and FA3 in Guizhou), and systematically studies its basic properties, heavy metal leaching rule and coupling mechanism, life cycle assessment. The research results indicate that there is a certain regularity between the performance of fly ash plastering mortar and the content of fly ash added, but there is no obvious regularity of different origins in the performance. The experimental results showed that the heavy metal content in fly ash plastering mortar showed a significant trend of gradually decreasing over time. The leaching kinetics fitting results showed that the Parabolic equation model was suitable for the leaching of Cr, the Elovich leaching model was suitable for the leaching of Hg, and the Elovich and Second-order kinetics equations were suitable for the leaching of Cd. In fly ash plastering mortar products, Cr, Cd, and Hg elements exist in the forms of Cr 3+ , Cr 6+ , Cd 2+ , and Hg 2+ . The relative atomic mass of Cr in these two forms is influenced by factors such as the origin, content, and strength grade of fly ash. The occurrence and coupling mechanism of heavy metals in cementitious materials and hydration products were also explored. The results of the life cycle assessment showed that fly ash plastering mortar provides better environmental benefits compared to conventional ones and has a greenhouse effect carbon emissions of about 983 kgCO 2 eq, which can be reduced by approximately 30% compared to conventional plastering mortar.

Słowa kluczowe

EN

fly ash plastering mortar; heavy metal leaching; coupling mechanism; life cycle carbon reduction

PL

zaprawa tynkarska; wymywanie metali ciężkich; redukcja emisji dwutlenku węgla

• Wydawca: Springer ; Wrocław University of Science and Technology
• Czasopismo: Archives of Civil and Mechanical Engineering
• Rocznik: 2024
• Tom: Vol. 24, no. 1
• Strony: art. no. e40, 2024
• Opis fizyczny: Bibliogr. 65 poz., rys., wykr.

Twórcy

autor

Wang Chao-qiang

• School of Materials Science and Engineering, Chongqing Jiaotong University, Chongqing 400074, China

• https://orcid.org/0000-0001-6138-4288

autor

Cheng Lin-xiao

• School of Materials Science and Engineering, Chongqing Jiaotong University, Chongqing 400074, China

autor

Liu Ke

• Synthetic Oil Branch of Sinopec Lubricants Co., Ltd, Chongqing 400050, China

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Uwagi

Opracowanie rekordu ze środków MNiSW, umowa nr POPUL/SP/0154/2024/02 w ramach programu "Społeczna odpowiedzialność nauki II" - moduł: Popularyzacja nauki (2025)