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Utilization of cow bone waste and calcium oxide for the solidification and stabilization of MSWI fly ash: Towards sustainable practices
Process Safety and Environmental Protection ( IF 6.9 ) Pub Date : 2024-08-26 , DOI: 10.1016/j.psep.2024.08.095 Zeinab Khalid , Lijuan Sun , Guojun Lv , Shunda Lin , Bangji Wei , Yin Duan , Xiaobo Liu , Xuguang Jiang
Process Safety and Environmental Protection ( IF 6.9 ) Pub Date : 2024-08-26 , DOI: 10.1016/j.psep.2024.08.095 Zeinab Khalid , Lijuan Sun , Guojun Lv , Shunda Lin , Bangji Wei , Yin Duan , Xiaobo Liu , Xuguang Jiang
The quest for sustainable waste management practices has catalysed the development of innovative approaches to transform waste into resourceful products. This study explores the effectiveness of cow bone waste and calcium oxide (CaO) as agents in the stabilization/solidification (S/S) process of Municipal Solid Waste Incineration (MSWI) fly ash derived from two distinct cities employing both grate-type and circulating fluidized bed incinerators in China. Employing a robust experimental framework, the research evaluated the stabilization efficacy for heavy metals, monitored the progression of pH, and quantified the compressive strength of the treated MSWI fly ash. Moreover, it conducted risk assessment and economic analyses. Incorporating CBW and CaO into the MSWI fly ash from grate-type incinerators significantly enhanced the Pb stabilization efficiency, achieving up to 99.7 % when adding 31 % CBW and 7 % CaO. This treatment resulted in the leaching of other heavy metals, which were also below the standard landfill limits. In the circulating fluidized bed incinerator fly ash, the leaching concentrations of heavy metals in the treated samples were reduced by up to 98.6 % for Cd and 64.4 % for Ni.
更新日期：2024-08-26
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