Fishbone is a major by-product of fishing processing and how to deal with the increasingly generated fishbone has been a big challenge. In an effort to convert the low-value waste into valuable material, this research explores the valorization of fishbone biowaste, which can be transformed into biochar as a persulfate activator for phenol removal. The fishbone derived biochar (FBBC) was prepared by one-step pyrolysis without additional template. The catalytic efficiency of FBBC increases with pyrolysis temperature, with FBBC-800 (pyrolyzed at 800 °C) exhibiting the best performance of 100% phenol (20 mg/L) removal within 60 min at the catalyst dosage of 0.1 g/L, which is comparable to other recently reported carbon-based catalysts but with the advantage of easy preparation, low cost and wastes valorization. The high efficacy of FBBC-800 is related to its large surface area (758.44 m²/g), carbonyl group and defective structure. In the FBBC-800/peroxydisulfate/phenol system, both radical and non-radical pathways are involved, among which hydroxyl radical is more important in radical pathway while singlet oxygen dominates in non-radical pathway. Electron transfer plays a key role in this process through electron capture experiment and electrochemical characterization. This study proposes a new strategy for the valorization of fishbone, and provides the guidance for the structure design of carbon-based catalyst for persulfate activation.

鱼骨是渔业加工的主要副产品，如何应对日益增长的鱼骨一直是一个巨大的挑战。为了将低价值的废物转化为有价值的材料，本研究探索了鱼骨生物废料的增值作用，可以将其作为过硫酸盐活化剂转化为生物炭，以去除苯酚。鱼骨来源的生物炭（FBBC）是通过一步热解制备的，无需其他模板。FBBC的催化效率随热解温度的增加而增加，FBBC-800（在800°C的温度下热解）在0.1 g / L的催化剂用量下60分钟内表现出100％苯酚（20 mg / L）去除的最佳性能。可与最近报道的其他碳基催化剂媲美，但具有制备容易，成本低和废物增值的优点。² / g），羰基和结构缺陷。在FBBC-800 /过二硫酸盐/苯酚体系中，自由基和非自由基途径都参与其中，其中羟自由基在自由基途径中更重要，而单线态氧在非自由基途径中占主导。通过电子捕获实验和电化学表征，电子转移在此过程中起关键作用。这项研究提出了一种新的鱼骨增值策略，并为过硫酸盐活化的碳基催化剂的结构设计提供了指导。