Gas-to-ash detoxification feasibility and pathways by co-combustion of spent pot lining and food waste shells
Yükleniyor...
Dosyalar
Tarih
2022
Dergi Başlığı
Dergi ISSN
Cilt Başlığı
Yayıncı
Elsevier Science Ltd
Erişim Hakkı
info:eu-repo/semantics/closedAccess
Özet
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.
Açıklama
Acknowledgments 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.
Anahtar Kelimeler
Fluorine, Spent Pot Lining, Food Wastes, Solid-Waste, Bottom Ash, Incineration
Kaynak
Journal of Cleaner Production
WoS Q Değeri
Q1
Scopus Q Değeri
Q1
Cilt
379
Sayı
Künye
Chen, 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.
