CO2 capture and utilization with solid waste

Nowadays, the massive consumption of fossil fuels and the resulting excessive emission of carbon dioxide (CO 2 ) have broken the original carbon balance of nature, resulting in global warming and the consequent detrimental environmental impacts. To address these issues, various initiatives have been proposed, among which CO 2 capture and utilization (CCU) is considered as the direct way to mitigate the accumulation of CO 2 in the atmosphere. Although a plethora of CO 2 capture reagents and utilization routes have been developed, the cost of CO 2 capture reagents as well as the amount of CO 2 utilization still encounters limitations. Recently, CCU with solid wastes have attracted sustained attention due to its ability to synchronize CO 2 fixation with solid wastes utilization. Especially, the huge amount and low cost of the solid wastes can promote the economic fixation of CO 2 and thus contribute significantly to the carbon sink. Given the tremendous utility of this strategy, this review article summarizes the state-of-the-art of CO 2 capture and utilization with solid wastes such as steel slag, concrete waste, fly ash, red mud, calcium carbide residue, and biomass etc. And three parts including CO 2 mineralization, solid waste-based catalyst promoted CO 2 transformation, and collaborative transformation of CO 2 and solid waste are introduced according to the roles of solid waste in CO 2 utilization. We hope this review can arouse broad concern and spur further development in this field.