当前位置: X-MOL 学术J. Polym. Environ. › 论文详情
Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)
A Promising Superabsorbent Nanocomposite Based on Grafting Biopolymer/Nanomagnetite for Capture of 134 Cs, 85 Sr and 60 Co Radionuclides
Journal of Polymers and the Environment ( IF 4.7 ) Pub Date : 2020-04-04 , DOI: 10.1007/s10924-020-01720-z
Hend A. El-saied , Ahmed M. Shahr El-Din , Botros A. Masry , Ahmed M. Ibrahim

A new high-swelling multi-component superabsorbent composite Na-CMC-g-P(AMPS-co-AA-co-AM)/NanoFe3O4 (SANCHs) was successfully designed and utilized for effective removal of 134Cs, 85Sr and 60Co radionuclides from radioactive wastewater. The structure and morphology of the superabsorbent composite have been mapped and characterized using different techniques (SEM, XRD, TEM, FTIR, and TGA). Superabsorbent hydrogel composite networks with magnetic iron particles have been disclosed to provide an advantage over previous methods. By using distinct models for kinetic investigation, mathematical fitting was observed to be pseudo-second-order with (R2) 0.987, 0.999, and 0.998 respectively for 134Cs, 60Co, and 85Sr. In addition, the highest adsorption capability was found to be 23.9, 43, and 47.2 mg g−1 respectively. The variation in the magnitude of enthalpy (ΔH) and free energy (ΔG) verify the spontaneous state of the adsorption reaction suggesting an endothermic process. Such a functionalized magnetic nanocomposite adsorbent demonstrates excellent prospective applications for effective separation of certain radionuclides from radioactive liquid waste.



中文翻译:

一种基于接枝生物聚合物/纳米磁铁矿的有前途的超吸收纳米复合材料,可捕获134 Cs,85 Sr和60 Co放射性核素

成功设计了一种新型的高溶胀多组分超吸收性复合材料Na-CMC-gP(AMPS-co-AA-co-AM)/ NanoFe 3 O 4(SANCHs),并有效去除了134 Cs,85 Sr和60放射性废水中的钴放射性核素。使用不同的技术(SEM,XRD,TEM,FTIR和TGA)对超吸收性复合材料的结构和形态进行了制图和表征。已经公开了具有磁性铁颗粒的超吸收性水凝胶复合物网络以提供优于先前方法的优点。通过使用不同的模型进行动力学研究,观察到数学拟合为伪二阶,其中(R 2)对于134 Cs,60 Co和85 Sr分别为0.987、0.999和0.998 ,此外,最高吸附能力分别为23.9、43和47.2 mg g -1。焓(ΔH)和自由能(ΔG)的大小变化证明了吸附反应的自发状态,表明存在吸热过程。这种功能化的磁性纳米复合吸附剂展示了从放射性液体废料中有效分离某些放射性核素的极好的预期应用。

更新日期:2020-04-04
down
wechat
bug