Abstract

The removal of hazardous metal ions from liquid waste effluents is very important for water as well as environmental security. In this regard, this article discusses the adsorption of hexavalent uranium U(VI) from aqueous solutions onto polyether type polyurethane foam in detail (PUF). SEM and FTIR measurements were used to characterize PUF prior to and after U(VI) adsorption, and batch-type experiments were used to investigate the effect of various parameters on adsorption efficiency, including pH, metal-ion concentration, temperature, and contact time. The sorption experimental data have been described well with pseudo-second-order kinetic mathematical equations. The Langmuir isotherm model accurately described the equilibrium process which declare that the uranium sorption is monolayer and homogeneous process. The sorption capacity of conventional polyurethane foam was 26.3 mg g^–1. Nitric acid (0.1 M) has been applied effectively for the desorption of U(VI) from the loaded sorbent. PUF material exhibit stable performance for five cycles of sorption/ desorption processes. The displayed results demonstrate that PUF may be used as a proper material for uranium sorption from real matrix samples.

中文翻译：

---

使用官能化聚氨酯聚合物从废液中吸附铀 (VI)：动力学和等温线表征

摘要

从废液中去除有害金属离子对水和环境安全非常重要。在这方面，本文详细讨论了六价铀 U(VI) 从水溶液中吸附到聚醚型聚氨酯泡沫 (PUF) 上。SEM 和 FTIR 测量用于表征 U(VI) 吸附前后的 PUF，并使用批次式实验研究各种参数对吸附效率的影响，包括 pH、金属离子浓度、温度和接触时间. 吸附实验数据已经用准二级动力学数学方程很好地描述了。朗缪尔等温线模型准确地描述了铀吸附的平衡过程，表明铀吸附是单层的均相过程。^–1。硝酸 (0.1 M) 已有效地用于从负载吸附剂中解吸 U(VI)。PUF 材料在五次吸附/解吸过程中表现出稳定的性能。显示的结果表明，PUF 可用作从真实基质样品中吸附铀的合适材料。