负载Ce~(4+)的脲醛树脂吸附剂的除氟性能

在传统方法合成的脲醛树脂中负载Ce~(4+)形成新型的除氟吸附材料(Ce-UF)。通过静态实验的方法,对实验的影响因素如pH、温度、其他干扰离子等进行研究。实验结果表明,在25℃下,Ce-UF吸附氟离子的理论最大吸附容量为40.2mg/g,Ce-UF吸附氟离子的吸附过程更符合二级动力学模型;Langmuir等温吸附模型适合模拟吸附过程;Ce-UF吸附氟离子的过程为离子交换为主的吸附过程。对吸附剂进行SEM、FTIR、XRD以及等电点分析探究其吸附机理。吸附剂可以使用NaOH进行再生,再生后的吸附剂依旧具备较高的除氟性能。现阶段的研究表明该吸附材料在处理含氟废水中具有潜在的工业应用价值。

Removal of Flouride From Aqueous Solution by Urea Formaldehyde Resin Loaded Ce4+

In this paper, a new adsorbent was synthesized by loading Ce⁴⁺ on the traditional urea formaldehyde resin for the removal of fluoride from aqueous solution. The factors affecting the experiment such as pH, temperature and coexisting anions were studied by static experiments. The results show that the maximum theoretical adsorption capacity are 40.2 mg/g at 25 ℃. It is well fitted by pseudo-second-order model and Langmuir equation can describe the adsorption capacity precisely. The mechanism of adsorptions is ion exchange. The characteristics of adsorption are identified by SEM, FTIR, XRD and isoelectric point test. Adsorbent can be regenerated by NaOH, the regeneration of the adsorbent still have a great fluoride removal performance. At the present study, the adsorption material can be an effective adsorbent for the treatment of fluoride waste water.