Zheng Dingyuan, Wang Yuning, Jia Xiaoke, Yao Wenrui, Wang Shuo, Li Zehuai, Sun Ce, Tan Haiyan, Zhang Yanhua
Key Laboratory of Bio-based Material Science & Technology (Northeast Forestry University), Ministry of Education, Harbin 150040, China; Engineering Research Center of Advanced Wooden Materials (Northeast Forestry University), Ministry of Education, Harbin 150040, China.
Key Laboratory of Bio-based Material Science & Technology (Northeast Forestry University), Ministry of Education, Harbin 150040, China; Engineering Research Center of Advanced Wooden Materials (Northeast Forestry University), Ministry of Education, Harbin 150040, China.
Chemosphere. 2024 Mar;351:141150. doi: 10.1016/j.chemosphere.2024.141150. Epub 2024 Jan 9.
Biomass-derived biochar shows broad promise for persistent organic pollutants (POPs) degradation and thus establishes a more sustainable homestead. However, effective catalytic performance is still challenging. Herein, an efficient catalyst (Prussian blue decorated wood-derived biochar, PBB) was constructed by introducing Prussian blue (PB) into wood-based biochar to activate peroxymonosulfate (PMS) for removing POPs. After anchoring of PB, the degradation performance of biochar was enhanced (degradation efficiency of methylene blue (MB, 20 mg/L) increased from 52% of biochar to 95% of PBB within 60 min). The PBB presents effective MB degradation performance with a wide pH value (3.0 < pH < 11.0) or co-existing diverse anions (Cl, NO, HPO, and HCO). Electron paramagnetic resonance (EPR) analysis as well as electrochemical tests confirmed that the non-radical pathway (O) is the key to biochar activation of PMS, but by restricting PB into the biochar, the radical pathway (SO and OH), the non-radical pathway (O), and direct electron transfer can work together to activate PMS. In addition, the degradation efficiency could remain about 80% after five-time cyclic tests. This work elucidates the role of PB nanoparticles in enhancing biochar catalysts, which can inspire the development of a carbon-neutralized, cost-effective, and effective strategy for POPs removal.
生物质衍生的生物炭在持久性有机污染物（POPs）降解方面显示出广阔前景，从而建立了一个更具可持续性的家园。然而，有效的催化性能仍然具有挑战性。在此，通过将普鲁士蓝（PB）引入木质生物炭中构建了一种高效催化剂（普鲁士蓝修饰的木质衍生生物炭，PBB），以活化过一硫酸盐（PMS）来去除POPs。在锚定PB后，生物炭的降解性能得到增强（在60分钟内，亚甲基蓝（MB，20mg/L）的降解效率从生物炭的52%提高到PBB的95%）。PBB在较宽的pH值范围（3.0＜pH＜11.0）或存在多种共存阴离子（Cl、NO、HPO和HCO）的情况下均表现出有效的MB降解性能。电子顺磁共振（EPR）分析以及电化学测试证实，非自由基途径（O）是生物炭活化PMS的关键，但通过将PB限制在生物炭中，自由基途径（SO和OH）、非自由基途径（O）以及直接电子转移可以共同作用来活化PMS。此外，经过五次循环测试后，降解效率仍可保持在80%左右。这项工作阐明了PB纳米颗粒在增强生物炭催化剂方面的作用，这可以激发开发一种碳中和、经济高效且有效的POPs去除策略。
