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<p>This work introduces, for the first time, the use of a green-synthesized magnetite/zirconium-based bio-metal-organic framework (MT/MIP-202 bio-MOF) nanocomposite as a dual-function photocatalyst and periodate (PI) activator for degrading refractory organic contaminants. The band gap energy decreased to 2.1&#xa0;eV after merging the MT nanoparticles and the MIP-202 bio-MOF, compared to 3.8&#xa0;eV in the case of single MIP-202, affirming the role of MT nanoparticles in enhancing visible light absorption. The MT/MIP-202@(PI + light) integrated system achieved a 98.57% degradation efficiency of the tetracycline (TCN) antibiotic under the optimum conditions (pH 7, [TCN]<sub>o</sub> = 25&#xa0;mg/L, [catalyst]<sub>o</sub> = 0.7&#xa0;g/L, [PI]<sub>o</sub> = 1.5 mM, and T = 25&#xa0;°C) within 60&#xa0;min. The synthesized nanocomposite exhibited high reusability with only 4.38% overall loss in the TCN degradation efficiency after five consecutive runs. Iodate radicals were identified as the dominant reactive species in the proposed TCN degradation mechanism. The TCN degradation efficiency in the proposed integrated system decreased to 49.25, 61.4, 75.41, 86.95, and 93.19% in the case of domestic wastewater, lake water, seawater, river water, and tap water, respectively, under the optimum conditions. The degradation efficiencies of bisphenol A, atrazine, and paracetamol were 74.54, 83.11, and 86.94% after 60&#xa0;min, respectively, while complete degradation of methylene blue and Congo red dyes was achieved within 40 and 45&#xa0;min, respectively. The system achieved 59.92% TCN degradation and 46.65% total organic carbon removal in real TCN-contaminated wastewater, demonstrating its potential for large-scale industrial wastewater treatment.</p>

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Green-Synthesized Magnetic Zr-MOF Nanocomposite for Pharmaceutical Wastewater Treatment via Integrated Photocatalysis/Periodate Activation System

  • 期刊论文

  • 发表日期：

    2026年3月22日

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  • Hassan Shokry,
  • Arafat Toghan,
  • Magdi E. A. Zaki,
  • Mahmoud Samy,
  • Mohamed Mohamed Gaber,
  • Marwa Elkady

摘要

This work introduces, for the first time, the use of a green-synthesized magnetite/zirconium-based bio-metal-organic framework (MT/MIP-202 bio-MOF) nanocomposite as a dual-function photocatalyst and periodate (PI) activator for degrading refractory organic contaminants. The band gap energy decreased to 2.1 eV after merging the MT nanoparticles and the MIP-202 bio-MOF, compared to 3.8 eV in the case of single MIP-202, affirming the role of MT nanoparticles in enhancing visible light absorption. The MT/MIP-202@(PI + light) integrated system achieved a 98.57% degradation efficiency of the tetracycline (TCN) antibiotic under the optimum conditions (pH 7, [TCN]o = 25 mg/L, [catalyst]o = 0.7 g/L, [PI]o = 1.5 mM, and T = 25 °C) within 60 min. The synthesized nanocomposite exhibited high reusability with only 4.38% overall loss in the TCN degradation efficiency after five consecutive runs. Iodate radicals were identified as the dominant reactive species in the proposed TCN degradation mechanism. The TCN degradation efficiency in the proposed integrated system decreased to 49.25, 61.4, 75.41, 86.95, and 93.19% in the case of domestic wastewater, lake water, seawater, river water, and tap water, respectively, under the optimum conditions. The degradation efficiencies of bisphenol A, atrazine, and paracetamol were 74.54, 83.11, and 86.94% after 60 min, respectively, while complete degradation of methylene blue and Congo red dyes was achieved within 40 and 45 min, respectively. The system achieved 59.92% TCN degradation and 46.65% total organic carbon removal in real TCN-contaminated wastewater, demonstrating its potential for large-scale industrial wastewater treatment.