The heavy metals and organic substances has deterioration of the ecosystem, resulting in serious environmental pollutions, thus urgent solutions need to be developed in treating these waste water problems. Functional compounds modified 3D polyurethane foams, with high surface to volume ratio has paid much attentions due to their high efficiency of absorption capability. In this study, polyethyleneimine (PEI) was used to incorporated into polyurethane foam (PUF) loaded with sodium carboxymethylcellulose (SCMC), resulting in a cross-linked, 3D interconnective porous polyurethane foam (PCPUF). The results of adsorption experiments demonstrated that PCPUF exhibited a strong adsorption capacity for both MO and Cd, with corresponding maximum adsorption capacity of 415.198 mg/g (at 328 K, pH 7) and 166.48 mg/g (at 343 K, pH 7), respectively. Furthermore, the results of cyclic adsorption experiments showed that the removal rates of MO and Cd after five cycles are 90 % and 85 %, respectively, indicating that PCPUF has a good recyclability. Therefore, 3D porous polyurethane foams show promise as an effective adsorbent for removing metal ions and organic substances.

中文翻译：

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使用掺有聚乙烯亚胺和羧甲基纤维素钠的 3D 多孔聚氨酯泡沫从水溶液中有效去除 Cd(II) 和甲基橙

重金属和有机物使生态系统恶化，造成严重的环境污染，因此迫切需要制定解决这些废水问题的方案。功能化合物改性的高比表面积3D聚氨酯泡沫由于其高效的吸收能力而备受关注。在这项研究中，将聚乙烯亚胺 (PEI) 掺入负载有羧甲基纤维素钠 (SCMC) 的聚氨酯泡沫 (PUF) 中，形成交联的 3D 互连多孔聚氨酯泡沫 (PCPUF)。吸附实验结果表明，PCPUF对MO和Cd均表现出较强的吸附能力，相应的最大吸附容量分别为415.198 mg/g（在328 K，pH 7）和166.48 mg/g（在343 K，pH 7） ， 分别。此外，循环吸附实验结果表明，5次循环后MO和Cd的去除率分别为90%和85%，表明PCPUF具有良好的可回收性。因此，3D多孔聚氨酯泡沫有望成为去除金属离子和有机物质的有效吸附剂。