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The utilization of waste products as valuable materials was a technical imperative for waste management.In this study,the cost-effective attapulgite/carbon (APT/C) composite was developed for wastewater treatment using waste hot-pot oil as a carbon precursor through a facile one-step calcination process.The APT/C composite prepared at 300℃ exhibited the excellent adsorption capacity and rapid equilibrium rate over a broad pH range for the removal of various pollutants.More importantly,the removal ratios of the composites toward Methyl Violet and tetracycline still remained 77.6％ and 60.2％ of the initial adsorption capacity after ten adsorption-regeneration cycles via a facile thermal regeneration strategy,respectively.Beyond all doubt,this research provided a feasible and economical way for the sustainable utilization of waste hot-pot oil in wastewater treatment,achieving the concept of disposal waste with waste and recycling.