State Key Joint Laboratory of Environment Simulation and Pollution Control (SKLESPC), Beijing Key Laboratory for Emerging Organic Contaminants Control, School of Environment, Tsinghua University, Beijing 100084, China; State Key Laboratory of Plateau Ecology and Agriculture, Qinghai University, Xi'ning, Qinghai Province 810016, China.
State Key Laboratory of Plateau Ecology and Agriculture, Qinghai University, Xi'ning, Qinghai Province 810016, China.
J Hazard Mater. 2021 Aug 15;416:125765. doi: 10.1016/j.jhazmat.2021.125765. Epub 2021 Mar 27.
Trichloropropyl phosphate (TCPP) as a widely used typical chlorinated organophosphate flame retardant has received significant attention because of its widespread presence in water and negative effects on human health. In this study, a ball-milling method was used to prepare a magnetic powdered carbon adsorbent (PC/nano-FeO composite) for TCPP removal via adsorption and catalytic degradation. The effect of FeO content on TCPP adsorption and degradation performance by PC/nano-FeO composite was investigated. The PC/nano-FeO composite prepared by high FeO content (25%) was not favorable for TCPP adsorption and degradation. However, the PC/FeO containing low FeO content (10%) had insufficient magnetic separation ability from water. The synthesized PC/nano-FeO composite with a FeO/PC mass ratio of 1/5 exhibited a maximum adsorption capacity of 2682.1 μg/g as well as a complete TCPP degradation within 3 h in a Fenton-like system. Moreover, the possible break sites of TCPP and its degradation pathway were proposed based on theoretical calculation and experimental analysis. Regeneration studies showed that PC/nano-FeO composite had high reusability and adsorption capacity in six cycles, while its catalytic performance declined in the multiple reuse cycles. This strategy could be extended to prepare other magnetic powdered adsorbents for organic pollutant adsorption and degradation.
磷酸三氯丙酯（TCPP）作为一种广泛使用的典型含氯有机磷阻燃剂，因其在水中的广泛存在及其对人类健康的负面影响而受到了极大的关注。在本研究中，采用球磨法制备了一种磁性粉末状碳吸附剂（PC/nano-FeO 复合材料），用于通过吸附和催化降解去除 TCPP。研究了 FeO 含量对 PC/nano-FeO 复合材料吸附和降解 TCPP 性能的影响。高 FeO 含量（25%）制备的 PC/nano-FeO 复合材料不利于 TCPP 的吸附和降解。然而，含有低 FeO 含量（10%）的 PC/FeO 复合材料从水中分离出来的磁性分离能力不足。当 FeO/PC 质量比为 1/5 时，合成的 PC/nano-FeO 复合材料具有最大的吸附容量 2682.1μg/g，在类 Fenton 体系中 3 小时内可完全降解 TCPP。此外，根据理论计算和实验分析提出了 TCPP 的可能断裂位点及其降解途径。再生研究表明，PC/nano-FeO 复合材料在六次循环中具有高的可重复使用性和吸附容量，但其催化性能在多次重复使用循环中下降。该策略可扩展到制备其他用于有机污染物吸附和降解的磁性粉末吸附剂。
