Henan Key Laboratory of Water Pollution Control and Rehabilitation Technology, Henan University of Urban Construction, Pingdingshan 467000, China.
School of Civil and Surveying Engineering, Jiangxi University of Science and Technology, Ganzhou 341000, China.
Langmuir. 2024 Oct 1;40(39):20616-20628. doi: 10.1021/acs.langmuir.4c02530. Epub 2024 Sep 16.
The production of sludge biochar (SBC) from residual sludge offers a solution to the challenges associated with sludge disposal and facilitates the reutilization of resources. In the present research, a bimetallic-modified sludge biochar, designated as FeCu-SBC, was synthesized by varying the doping ratios of FeSO and CuSO. This material was intended for the effective degradation of tetracycline (TC) in aqueous environments via the activation of peroxydisulfate. The FeCu2-SBC (90% degradation rate) composite, synthesized through the incorporation of Fe and Cu in a 1:2 ratio with SBC, exhibited a degradation rate of TC, which was 2.7 times higher than that of SBC (32.85% degradation rate) and 1.8 times higher than that of FeCu (50% degradation rate). Research examining the mechanisms involved revealed that FeCu underwent degradation solely through the radical (OH) pathway, whereas FeCu2-SBC was subject to degradation through both radical (SO) and nonradical (O) pathways. This phenomenon was attributed to the distinct π-π, C═O, and defect structures in FeCu2-SBC compared to FeCu, which facilitated the activation process leading to the production of reactive species. This investigation presented a cost-effective approach for producing bimetallic-modified sludge biochar, offering perspectives on determining the crucial elements influencing the streamlined TC degradation pathway.
从剩余污泥中生产污泥生物炭（SBC）为解决污泥处理带来的挑战提供了一种解决方案，并促进了资源的再利用。在本研究中，通过改变 FeSO 和 CuSO 的掺杂比例，合成了一种双金属修饰的污泥生物炭，命名为 FeCu-SBC。该材料旨在通过过一硫酸盐的活化，在水相环境中有效降解四环素（TC）。通过将 SBC 中以 1:2 比例掺入的 Fe 和 Cu 合成的 FeCu2-SBC（降解率为 90%）复合材料，其 TC 降解率比 SBC（降解率为 32.85%）高 2.7 倍，比 FeCu（降解率为 50%）高 1.8 倍。研究表明，FeCu 仅通过自由基（OH）途径降解，而 FeCu2-SBC 则通过自由基（SO）和非自由基（O）途径降解。与 FeCu 相比，FeCu2-SBC 中的独特的π-π、C═O 和缺陷结构促进了活化过程，从而产生了活性物质。该研究提出了一种生产双金属修饰污泥生物炭的经济有效的方法，为确定影响 TC 降解途径的关键因素提供了思路。
