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<p>Rhenium (Re) is a critical rare and precious element in modern industry, often associated with molybdenite deposits in nature. The pressurized ammonia leaching method for processing molybdenum (Mo) concentrates enables an efficient extraction of both Mo and Re; however, their separation in an alkaline environment is a challenging task. This study presents a hydrophobic benzyl-modified cellulose microsphere (BACM) adsorbent for the adsorption and separation of Re and Mo. As BACM is derived from cellulose-based materials, it inherits renewability, environmental friendliness, and alkaline suitability, enhancing its adsorption efficiency. By virtue of the anti-Hofmeister effect, the BACM adsorbent exhibits enhanced adsorption performance, efficiently separating Re(VII) and Mo(VI) across a pH range of 6–12 with a maximum separation factor of 1.5 × 10<sup>3</sup> and an adsorption capacity for Re(VII) as high as 99.97&#xa0;mg/g. The adsorption mechanism involves specific anion trapping and ion exchange within the hydrophobic microenvironment. Column adsorption experiments confirm that BACM can effectively separate and enrich Re(VII) and Mo(VI) from real Mo concentrate alkaline leach solutions, demonstrating its applicability in this context.</p>

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Benzyl-modified hydrophobic cellulose microspheres for rhenium purification from molybdenum system

  • 期刊论文

  • 发表日期：

    2025年7月15日

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  • Zhaoheng Zhu,
  • Wei Wang,
  • Ze Wu,
  • Yukun Huang,
  • Long Wang,
  • Jiang Liu

摘要

Rhenium (Re) is a critical rare and precious element in modern industry, often associated with molybdenite deposits in nature. The pressurized ammonia leaching method for processing molybdenum (Mo) concentrates enables an efficient extraction of both Mo and Re; however, their separation in an alkaline environment is a challenging task. This study presents a hydrophobic benzyl-modified cellulose microsphere (BACM) adsorbent for the adsorption and separation of Re and Mo. As BACM is derived from cellulose-based materials, it inherits renewability, environmental friendliness, and alkaline suitability, enhancing its adsorption efficiency. By virtue of the anti-Hofmeister effect, the BACM adsorbent exhibits enhanced adsorption performance, efficiently separating Re(VII) and Mo(VI) across a pH range of 6–12 with a maximum separation factor of 1.5 × 103 and an adsorption capacity for Re(VII) as high as 99.97 mg/g. The adsorption mechanism involves specific anion trapping and ion exchange within the hydrophobic microenvironment. Column adsorption experiments confirm that BACM can effectively separate and enrich Re(VII) and Mo(VI) from real Mo concentrate alkaline leach solutions, demonstrating its applicability in this context.