Olivito Fabrizio, Ilham Zul, Wan-Mohtar Wan Abd Al Qadr Imad, Oza Goldie, Procopio Antonio, Nardi Monica
Department of Environmental Engineering, University of Calabria, Via P. Bucci, 87036 Arcavacata di Rende, Italy.
Environmental Science and Management Program, Institute of Biological Sciences, Faculty of Science, Universiti Malaya, Kuala Lumpur 50603, Malaysia.
Polymers (Basel). 2025 Jul 17;17(14):1959. doi: 10.3390/polym17141959.
In this study, we tested a flexible polyurethane (PU) foam, synthesized from bio-based components, for the removal of petroleum-derived fuels from water samples. The PU was synthesized via the prepolymer method through the reaction of PEG 400 with L-lysine ethyl ester diisocyanate (L-LDI), followed by chain extension with 2,5-bis(hydroxymethyl)furan (BHMF), a renewable platform molecule derived from carbohydrates. Freshwater and seawater samples were artificially contaminated with commercial diesel, gasoline, and kerosene. Batch adsorption experiments revealed that the total sorption capacity (S, g/g) of the PU was slightly higher for diesel in both water types, with values of 67 g/g in freshwater and 70 g/g in seawater. Sorption kinetic analysis indicated that the process follows a pseudo-second-order kinetic model, suggesting strong chemical interactions. Equilibrium data were fitted using Langmuir and Freundlich isotherm models, with the best fit achieved by the Langmuir model, supporting a monolayer adsorption mechanism on homogeneous surfaces. The PU foam can be regenerated up to 50 times by centrifugation, maintaining excellent performance. This study demonstrates a promising application of this sustainable and bio-based polyurethane foam for environmental remediation.
在本研究中，我们测试了一种由生物基成分合成的柔性聚氨酯（PU）泡沫，用于去除水样中的石油衍生燃料。该PU是通过预聚物法合成的，由聚乙二醇400（PEG 400）与L-赖氨酸乙酯二异氰酸酯（L-LDI）反应，然后用2,5-双（羟甲基）呋喃（BHMF）进行扩链反应得到，BHMF是一种源自碳水化合物的可再生平台分子。淡水和海水样品被人工污染了商业柴油、汽油和煤油。批量吸附实验表明，PU对两种水中柴油的总吸附容量（S，g/g）略高，在淡水中为67 g/g，在海水中为70 g/g。吸附动力学分析表明，该过程遵循准二级动力学模型，表明存在强化学相互作用。平衡数据用朗缪尔和弗伦德里希等温线模型拟合，朗缪尔模型拟合效果最佳，支持在均匀表面上的单层吸附机制。PU泡沫通过离心可再生多达50次，性能保持优异。本研究证明了这种可持续的生物基聚氨酯泡沫在环境修复方面具有广阔的应用前景。
