Scholarlink

<p>Developing suitable peroxymonosulfate (PMS) catalysts for activation in purification processes is challenging. The high-performance PMS activation catalyst, PTSi, was successfully synthesized by incorporating SiO<sub>2</sub> nanoparticles into nanoscale iron-sulfide tailings through a co-precipitation and calcination method. Under optimal conditions, PTSi achieved a tetracycline (TC) removal efficiency of 95.46% in aqueous solutions within 60&#xa0;min. After three reuses, the catalyst maintained its strong performance. The active oxygen species (ROS) involved in the degradation of TC were confirmed through electron paramagnetic resonance (EPR) and radical quenching experiments. These experiments demonstrated that SiO<sub>2</sub> doping enhanced the formation of oxygen vacancies (OVs) on the catalyst surface. Based on X-ray photoelectron spectroscopy (XPS) and electron paramagnetic resonance (EPR) characterization data, it was found that Fe<sup>2+</sup> and OVs on the surface of the PTSi catalyst rapidly generate <sup>1</sup>O<sub>2</sub> after activating PMS, thereby accelerating the degradation of TC. The potential degradation pathways of TC within the PTSi/PMS system were examined through liquid chromatography-mass spectrometry (LC–MS) analysis. This study proposes a novel approach to treat one type of waste using another, aiming to prepare reusable PMS catalysts from mineral processing residues. This method demonstrates significant potential for water pollution control and the utilization of iron-sulfur tailings.</p>

错误：搜索内容不能为空，请输入英文关键词
错误：关键词超出字数限制，请精简
高级检索

Peroxymonosulfate activation by iron-sulfur tailings doped with SiO2 for efficient degradation of tetracycline

  • 期刊论文

  • 发表日期：

    2025年10月1日

查看全文
  • Chen-Chen Yin,
  • Chun Cheng,
  • Peng-Yu Zhang,
  • Zheng-Yuan Zhang,
  • Ying Qin,
  • Li-Pin Xue,
  • Yu-Qi Feng,
  • Bai Sun,
  • Shu-guang Zhu

摘要

Developing suitable peroxymonosulfate (PMS) catalysts for activation in purification processes is challenging. The high-performance PMS activation catalyst, PTSi, was successfully synthesized by incorporating SiO2 nanoparticles into nanoscale iron-sulfide tailings through a co-precipitation and calcination method. Under optimal conditions, PTSi achieved a tetracycline (TC) removal efficiency of 95.46% in aqueous solutions within 60 min. After three reuses, the catalyst maintained its strong performance. The active oxygen species (ROS) involved in the degradation of TC were confirmed through electron paramagnetic resonance (EPR) and radical quenching experiments. These experiments demonstrated that SiO2 doping enhanced the formation of oxygen vacancies (OVs) on the catalyst surface. Based on X-ray photoelectron spectroscopy (XPS) and electron paramagnetic resonance (EPR) characterization data, it was found that Fe2+ and OVs on the surface of the PTSi catalyst rapidly generate 1O2 after activating PMS, thereby accelerating the degradation of TC. The potential degradation pathways of TC within the PTSi/PMS system were examined through liquid chromatography-mass spectrometry (LC–MS) analysis. This study proposes a novel approach to treat one type of waste using another, aiming to prepare reusable PMS catalysts from mineral processing residues. This method demonstrates significant potential for water pollution control and the utilization of iron-sulfur tailings.