Landfill leachate nanofiltration concentrates (LLNC) contain complex organic pollutants that are difficult to treat. This study developed a copper-doped attapulgite-chitosan composite catalyst (Cu@ATP-CTS) for efficient LLNC degradation in a Fenton-like system. The incorporation of attapulgite extended the effective pH range of Fenton reactions from 2 to 8, overcoming traditional limitations. Optimized via response surface methodology, the catalyst achieved 89.02% UV removal, 73.86% COD removal, and 77.24% TOC removal within 115 minutes under optimal conditions. Copper played a crucial role in H₂O₂ activation, cycling between Cu, Cu, and Cu to generate hydroxyl radicals (·OH), the key species driving pollutant degradation. The Cu@ATP-CTS catalyst also demonstrated strong stability and reusability over five cycles. This study provides a robust and sustainable method for LLNC treatment, offering significant potential for application in landfill leachate and wastewater management.
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| http://dx.doi.org/10.1016/j.envres.2024.120681 | DOI Listing |
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