文献类型：期刊文献

英文题名：Chalcocite-catalyzed Fenton coupling with biodegradation for N , N-dimethylformamide treatment: insights into mechanism and cost-effectiveness

作者：Cai, Zhengqing[1,5];Zhao, Jiayi[1];Song, Yanyu[1];Liu, Yongdi[1];Nghiem, Long D.[2];Duan, Jun[3];Che, Chengdan[4];Sun, Xianbo[1]

机构：[1]East China Univ Sci & Technol, Natl Engn Res Ctr Ind Wastewater Detoxicat & Resou, Shanghai 200237, Peoples R China;[2]Univ Technol Sydney, Sch Civil & Environm Engn, Ctr Technol Water & Wastewater, Ultimo, NSW 2007, Australia;[3]Purdue Univ, Dept Agron, W Lafayette, IN 47907 USA;[4]Shanghai LIRI Technol Co Ltd, Shanghai, Peoples R China;[5]Shanghai Inst Pollut Control & Ecol Secur, Shanghai 200237, Peoples R China

年份：2025

卷号：518

外文期刊名：JOURNAL OF CLEANER PRODUCTION

收录：;EI(收录号：20252318563126);WOS:【SCI-EXPANDED(收录号:WOS:001510464800001)】；

基金：This study was financially supported by the National Natural Science Foundation of China (41807340) , Natural Science Foundation of Shanghai [21ZR1415600] .

语种：英文

外文关键词：Chalcocite oxide; Heterogeneous catalytic; Fenton coupled biodegradation; N,N-dimethylformamide

摘要：A naturally abundant chalcocite was thermally modified for Fenton degradation of N,N-dimethylformamide (DMF), and the coupled biodegradation was explored to achieve greener and efficient treatment. The chalcocite oxide derived from 350 degrees C mainly consists of Cu2S, CuO and Fe2O3, possessing an enlarged pore size and greater surface area. Under the optimum conditions (10 mM H2O2, pH 3.0, and a catalyst dosage of 2.0 g/L), the Fenton reaction achieved complete removal (100 %) of DMF within 5 min, demonstrating 100 times higher activity than pristine chalcocite. The promoted activity is attributed to the presence of S2-, which can accelerate the conversion of H2O2 into ROS by facilitating the redox reactions of Fe3+/Fe2+ and Cu2+/Cu+. The contribution of active species to DMF degradation follows the order of center dot OH > O-2(center dot-) > O-1(2), with the aqueous phase center dot OH playing a more prominent role in DMF degradation compared to the surface-bonded center dot OH. The Fenton degradation pathway analysis and mathematical calculations reveal that the intermediates are less toxic and more biodegradable, thus a Fenton-coupled biodegradation method was proposed. The batch and pilot experiments demonstrated that, compared with the Fenton reaction, this coupling method can reduce H2O2 consumption by 75 % and enable fast and cost-effective DMF removal. This work presents an effective method for treating bio-refractory organic compounds, thus providing an economically efficient treatment approach for industrial wastewater treatment.