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<p>This work presents the influence of water pH on the stability of supported liquid membrane (SLM) regards its mutual solubility. For the solubility experiments, both liquid–liquid binary and ternary systems are studied in different water pH (2.0, 7.0, and 13.0) at 303.15&#xa0;K and atmospheric pressure. In the organic phase, tri-<i>n</i>-octylamine (TOA) combined with various organic solvents is used; adjusted pH water is used in the aqueous phase. Results demonstrate that, in the organic phase, basic water reveals the least solubility. Data correlation utilizing the NRTL model fitted in well with the experimental data as validated by &lt; 5% RMSD. For the interaction molecular study of the involved molecules, density function theory (DFT) is carried out. Application of the hollow fiber-supported liquid membrane (HFSLM) shows that stability is affected by the solubility of different pH water. It is noted that the basic-based feed provides the longest stability, which is consistent with the solubility results.</p>

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Investigation on SLM’s Stability via the Mutual Solubility of Different Water pH + TOA + Organic Solvents and DFT Calculation

  • 期刊论文

  • 发表日期：

    2025年3月14日

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  • Thanaporn Arunchai,
  • Vanee Mohdee,
  • Natthapol Triwongsa,
  • Ura Pancharoen,
  • Kasidit Nootong,
  • Wikorn Punyain

摘要

This work presents the influence of water pH on the stability of supported liquid membrane (SLM) regards its mutual solubility. For the solubility experiments, both liquid–liquid binary and ternary systems are studied in different water pH (2.0, 7.0, and 13.0) at 303.15 K and atmospheric pressure. In the organic phase, tri-n-octylamine (TOA) combined with various organic solvents is used; adjusted pH water is used in the aqueous phase. Results demonstrate that, in the organic phase, basic water reveals the least solubility. Data correlation utilizing the NRTL model fitted in well with the experimental data as validated by < 5% RMSD. For the interaction molecular study of the involved molecules, density function theory (DFT) is carried out. Application of the hollow fiber-supported liquid membrane (HFSLM) shows that stability is affected by the solubility of different pH water. It is noted that the basic-based feed provides the longest stability, which is consistent with the solubility results.