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<p>The growing discharge of industrial oily wastewater poses a serious threat to both environmental and human health. This has intensified the demand for efficient, durable, and sustainable oil spill remediation technologies. Metal–organic frameworks (MOF), with their high surface area and tunable physicochemical properties, have emerged as promising candidates for oil spill cleanup. In this study, a novel approach involving the functionalization of polypropylene (PP).</p><p>sheets with styrene and MOF-5 enhances their oil absorption capabilities. The incorporation of styrene significantly improves the oil affinity of the PP sheet, achieving a contact angle of 120.8°, indicating strong oleophilicity. The stability of the PP composite under various pH conditions was evaluated using acidic (HCl) and basic (NaOH) environments, where both oil absorption capacity and the contact angle were found to decrease with increasing concentration. An absorption setup using a vessel system demonstrated excellent oil separation efficiency, achieving a capacity of 58.3&#xa0;g/g, a high separation flux of 1222.9&#xa0;L/m<sup>2</sup>h, and recyclability up to 70 cycles. These results highlight the potential of the PP-MOF composite as a robust and reusable material for next-generation oil spill remediation and recovery applications, leveraging the synergistic effects of PP surface chemistry and MOF functionality.</p> Graphical abstract <p></p>

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Oil selectivity and absorption efficiency of MOF-5-coated polypropylene composites

  • 期刊论文

  • 发表日期：

    2025年8月18日

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  • Isha Riyal,
  • Anushka Rawat,
  • Kavita Mishra,
  • Himani Sharma,
  • Charu Dwivedi

摘要

The growing discharge of industrial oily wastewater poses a serious threat to both environmental and human health. This has intensified the demand for efficient, durable, and sustainable oil spill remediation technologies. Metal–organic frameworks (MOF), with their high surface area and tunable physicochemical properties, have emerged as promising candidates for oil spill cleanup. In this study, a novel approach involving the functionalization of polypropylene (PP).

sheets with styrene and MOF-5 enhances their oil absorption capabilities. The incorporation of styrene significantly improves the oil affinity of the PP sheet, achieving a contact angle of 120.8°, indicating strong oleophilicity. The stability of the PP composite under various pH conditions was evaluated using acidic (HCl) and basic (NaOH) environments, where both oil absorption capacity and the contact angle were found to decrease with increasing concentration. An absorption setup using a vessel system demonstrated excellent oil separation efficiency, achieving a capacity of 58.3 g/g, a high separation flux of 1222.9 L/m2h, and recyclability up to 70 cycles. These results highlight the potential of the PP-MOF composite as a robust and reusable material for next-generation oil spill remediation and recovery applications, leveraging the synergistic effects of PP surface chemistry and MOF functionality.

Graphical abstract