Wang Feihong, Tan Lichao, Liu Qi, Li Rumin, Li Zhanshuang, Zhang Hongsen, Hu Songxia, Liu Lianhe, Wang Jun
Key Laboratory of Superlight Material and Surface Technology, Ministry of Education, Harbin Engineering University, Harbin 150001, China.
Institute of Advanced Marine Materials, Harbin Engineering University, 150001, China.
J Environ Radioact. 2015 Dec;150:93-8. doi: 10.1016/j.jenvrad.2015.07.002. Epub 2015 Aug 24.
Uranium biosorption from aqueous solutions by pollen pini (Pinus massoniana pollen) was studied in a bath system. The biosorbent was characterized by Fourier-transform infrared spectroscopy and scanning electron microscope. The influences of pH, contact time and initial uranium concentration at room temperature were investigated and the experimental curves were obtained. The pollen pini exhibited the highest uranium sorption capacity at pH 5.0 after 2 h contact. At pH 2.5 pollen pini also exhibited a good uranium loading capacity (>15%). Therefore biosorption characteristics of uranium from aqueous solution onto pollen pini were examined at pH 2.5 as well. The kinetics followed a pseudo-second-order rate equation and adsorption process was well fitted with the Freundlich isotherm at both pH. The adsorption of uranium by the biosorbent was confirmed by energy dispersive spectroscopy. The present study suggested that pollen pini could be a suitable biosorbent for biosorption uranium (VI) from aqueous solution in a fast, low cost and convenient approach.
在一个间歇系统中研究了马尾松花粉对水溶液中铀的生物吸附作用。采用傅里叶变换红外光谱和扫描电子显微镜对生物吸附剂进行了表征。研究了室温下pH值、接触时间和初始铀浓度的影响，并获得了实验曲线。接触2小时后，马尾松花粉在pH 5.0时表现出最高的铀吸附容量。在pH 2.5时，马尾松花粉也表现出良好的铀负载能力（>15%）。因此，也在pH 2.5条件下研究了水溶液中铀在马尾松花粉上的生物吸附特性。动力学遵循准二级速率方程，在两个pH值下吸附过程均与Freundlich等温线拟合良好。通过能谱证实了生物吸附剂对铀的吸附。本研究表明，马尾松花粉可能是一种合适的生物吸附剂，能够以快速、低成本且便捷的方式从水溶液中生物吸附铀（VI）。
