Effects of biomass feedstocks on the activation of persulfate by magnetic biochar for the removal of norfloxacin

IF 4.9 2区化学 Q2 CHEMISTRY, PHYSICAL

Colloids and Surfaces A: Physicochemical and Engineering Aspects Pub Date : 2025-03-11 DOI:10.1016/j.colsurfa.2025.136501

Yun Zhang , Yunqiang Yi , Yue Fu , Qin Wang , Yu Wang , Yi Diao , Zenghui Diao , Zhenguo Chen

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引用次数: 0

Abstract

The activation of persulfate (PS) by magnetic biochar (MBC) is a promising approach for degrading organic pollutants in water. However, the influence of biomass feedstocks on the activation performance of MBC for PS remains underexplored. In this study, three types of MBC were synthesized from sugarcane bagasse (GMBC), rice straw (DMBC), and water hyacinth (SMBC) to evaluate their effectiveness in activating PS for norfloxacin (NOR) degradation. NOR degradation experiments showed variations in NOR removal efficiency among the different MBC/PS systems. Specifically, the DMBC/PS system achieved a NOR removal efficiency of 91.53 %, which was approximately 1.32 and 1.25 times higher than those of the GMBC/PS and SMBC/PS systems, respectively. Free radical scavenging experiments and electron paramagnetic resonance (EPR) analysis confirmed that the contribution of free radicals to NOR removal varied significantly among the MBC/PS systems, indicating that the types and behaviors of free radicals were influenced by the biomass feedstocks. The active sites responsible for PS activation were identified, elucidating the variability in the contribution of active sites among different MBC/PS systems. These findings suggested that biomass feedstocks indeed played a pivotal role in influencing the activation efficiency of MBC, offering valuable insights for optimizing advanced oxidation technology based on MBC.

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来源期刊

Colloids and Surfaces A: Physicochemical and Engineering Aspects 化学-物理化学

CiteScore

8.70

自引率

9.60%

发文量

2421

审稿时长

56 days

期刊介绍： Colloids and Surfaces A: Physicochemical and Engineering Aspects is an international journal devoted to the science underlying applications of colloids and interfacial phenomena. The journal aims at publishing high quality research papers featuring new materials or new insights into the role of colloid and interface science in (for example) food, energy, minerals processing, pharmaceuticals or the environment.