Shao Dadong, Li Yuying, Wang Xiaolin, Hu Sheng, Wen Jun, Xiong Jie, Asiri Abdullah M, Marwani Hadi M
Institute of Nuclear Physics and Chemistry, China Academy of Engineering Physics, No. 64 Mianshan Road, Mianyang 621900, P. R. China.
School of Chemistry & Environmental Engineering, Wuyi University, No. 2 Dongcheng Road, Jiangmen 529020, P. R. China.
ACS Omega. 2017 Jul 7;2(7):3267-3275. doi: 10.1021/acsomega.7b00375. eCollection 2017 Jul 31.
For uranium extraction from seawater, development of new stable and reusable sorbents with high affinity and good selectivity for U(VI) is required. Herein, a new phosphate-functionalized polyethylene (denoted PO/PE) was synthesized via a simple Ar-jet plasma treatment of PE in concentrated HPO and was employed in U(VI) extraction from seawater. The prepared PO/PE shows superior performance in the extraction of trace U(VI) from seawater. The adsorption process followed the second-order kinetics model and the Langmuir model. The maximum adsorption capacity of PO/PE for U(VI) reaches 173.8 mg/g at pH 8.2 and 298 K. PO/PE can be effectively regenerated by 0.1 mol/L NaCO and reused well even after eight cycles. Experimental results offer a new approach for U(VI) uptake from seawater.
为了从海水中提取铀，需要开发对U(VI)具有高亲和力和良好选择性的新型稳定且可重复使用的吸附剂。在此，通过在浓HPO中对PE进行简单的氩气喷射等离子体处理，合成了一种新型的磷酸官能化聚乙烯（表示为PO/PE），并将其用于从海水中提取U(VI)。制备的PO/PE在从海水中提取痕量U(VI)方面表现出优异的性能。吸附过程遵循二级动力学模型和朗缪尔模型。在pH 8.2和298 K条件下，PO/PE对U(VI)的最大吸附容量达到173.8 mg/g。PO/PE可以用0.1 mol/L NaCO有效再生，即使经过八个循环也能很好地重复使用。实验结果为从海水中摄取U(VI)提供了一种新方法。
