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<p>Recently, energy and environmental issues have become widespread concerns in human sustainable development. In the present research work, a novel bifunctional material ethylenediamine tetra(methylene phosphonic acid)-modified alginate-based polymer composite EDTMPA-F/A has been successfully developed, which has been utilized both in the biodiesel catalytic synthesis process of free fatty acid (FFA) oleic acid with short-chain alcohol ethanol and heavy metal ions removal from aqueous solutions. EDTMPA-F/A has displayed excellent catalytic performance for biodiesel synthesis, and the corresponding reaction parameters such as molar ratio of alcohol to acid, catalytic amount and reaction temperature have been optimized by response surface methodology (RSM), and the highest conversion ratio (89.0 ± 0.6%) could be achieved at the optimum conditions with 10.76 wt% of catalyst amount and 6.63: 1 of ethanol to oleic acid molar ratio at 81.27&#xa0;°C. Furthermore, a systematic kinetic study on the esterification reaction was conducted. Meanwhile, EDTMPA-F/A has also exhibited efficient adsorption properties for heavy metal ions, especially for lead ions. The adsorption kinetics and the adsorption isotherms of EDTMPA-F/A for lead ions at different temperatures have been investigated, and the maximum adsorption capacity of EDTMPA-F/A for lead ions could reach 735.29&#xa0;mg/g at 15&#xa0;°C. Therefore, it is concluded that the extraordinary features of EDTMPA-F/A for both biodiesel catalytic synthesis and lead ions removal can effectively achieve the highly efficient integration of the functional material and ensure its applicability and feasibility in the industrial scale.</p>

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Exploration of a novel bifunctional Ethylenediamine tetra(methylenephosphonic acid) modified alginate-based polymer composite for efficient biodiesel synthesis and Pb (II) adsorption

  • 期刊论文

  • 发表日期：

    2026年2月4日

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  • Xuejiao Ju,
  • Feifei Li,
  • Ping Yin,
  • Yuzhong Niu,
  • Yanbin Xu,
  • Honglai Cai

摘要

Recently, energy and environmental issues have become widespread concerns in human sustainable development. In the present research work, a novel bifunctional material ethylenediamine tetra(methylene phosphonic acid)-modified alginate-based polymer composite EDTMPA-F/A has been successfully developed, which has been utilized both in the biodiesel catalytic synthesis process of free fatty acid (FFA) oleic acid with short-chain alcohol ethanol and heavy metal ions removal from aqueous solutions. EDTMPA-F/A has displayed excellent catalytic performance for biodiesel synthesis, and the corresponding reaction parameters such as molar ratio of alcohol to acid, catalytic amount and reaction temperature have been optimized by response surface methodology (RSM), and the highest conversion ratio (89.0 ± 0.6%) could be achieved at the optimum conditions with 10.76 wt% of catalyst amount and 6.63: 1 of ethanol to oleic acid molar ratio at 81.27 °C. Furthermore, a systematic kinetic study on the esterification reaction was conducted. Meanwhile, EDTMPA-F/A has also exhibited efficient adsorption properties for heavy metal ions, especially for lead ions. The adsorption kinetics and the adsorption isotherms of EDTMPA-F/A for lead ions at different temperatures have been investigated, and the maximum adsorption capacity of EDTMPA-F/A for lead ions could reach 735.29 mg/g at 15 °C. Therefore, it is concluded that the extraordinary features of EDTMPA-F/A for both biodiesel catalytic synthesis and lead ions removal can effectively achieve the highly efficient integration of the functional material and ensure its applicability and feasibility in the industrial scale.