Chen, ZihongLiu, JingyongWu, XieyuanLiu, WeizhenZhang, GangEvrendilek, Fatih2023-08-072023-08-072022Chen, Z., Liu, J., Wu, X., Liu, W., Zhang, G., Evrendilek, F., & Sun, G. (2022). Gas-to-ash detoxification feasibility and pathways by co-combustion of spent pot lining and food waste shells. Journal of Cleaner Production, 379, 134626.0959-65261879-1786http://dx.doi.org/10.1016/j.jclepro.2022.134626https://hdl.handle.net/20.500.12491/11443Acknowledgments This work was financially supported by the Open Fund of Guangdong Provincial Key Laboratory of Solid Wastes Pollution Control and Recy-cling (No. 2020B121201003) , National Natural Science Foundation of China (No. 51978175 and No. 22006015) , the Scientific and Techno-logical Planning Project of Guangzhou, China (No. 202103000004) , and the Natural Science Foundation of Guangdong Province, China (No.2022A1515010825 and No. 2022A0505050076) and Dongguan Sci-tech Commissioner Project (No.20221800500282) . We would like to thank Miss Chunxiao Yang at the Analysis and Test Center of Guangdong University of Technology for her assistance with device operation and analysis guidance.Seeking substitutions for Ca-bearing reagents, this study explored the synergistic co-disposal and co-circularity of spent pot lining (SPL) and food waste shells (oyster, clam, and egg shells) in an eco-friendly way. This study is first to evaluate the feasibility of their co-combustions with or without their mechanochemical activation (MCA) toward the gas-to-ash detoxification of fluorine (F). 50% calcined oyster shell fixed about 97.87% of the F content of SPL in the blend ash and outperformed 50% CaO. MCA weakened the diffraction peaks of graphite carbon by favoring the fixation performance through which collisions between particles and the mixing uni-formity were promoted. The combination of 10% SiO2 and 40% calcined clam or egg shells raised the F fixation rate to 98.72 and 99.23%, respectively. F was converted to the complex F-Si-Ca compounds rather than to CaF2. Ca and Si compounds facilitated stabilizing F and Na synchronously and formed NaCa2SiO4F. The leaching F concentration of the ash was less than 100 mg/L, meeting the Chinese criterion (GB 5085.3-2007). The recycling of the food waste shells performed effectively in the cleaner disposal process of SPL by suppressing fluorine emissions.eninfo:eu-repo/semantics/closedAccessFluorineSpent Pot LiningFood WastesSolid-WasteBottom AshIncinerationArticle10.1016/j.jclepro.2022.1346263791212-s2.0-85140435520Q1WOS:000878594700002Q1