琥珀酸改性氧化铁吸附剂对 U(VI) 的高效选择性吸附,Radiochimica Acta

当前位置： X-MOL 学术 › Radiochim. Acta › 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.)

琥珀酸改性氧化铁吸附剂对 U(VI) 的高效选择性吸附
Radiochimica Acta ( IF 1.4 ) Pub Date : 2022-04-18 , DOI: 10.1515/ract-2021-1115
Pamarthi Amesh _{1,

2} , Konda Athmaram Venkatesan _{1,

2} , Asokan Sudha Suneesh ₃ , Manish Chandra ₃ , Deepak K. Gupta ₄ , Ravindran R. Thoguluva ₄

Affiliation

氧化铁表面用琥珀酸部分改性，并评估获得的吸附剂 Fe-SUC 从水溶液中吸附 U(VI)（铀 (VI)）的情况。Fe-SUC通过FT-IR（傅里叶变换红外光谱）、拉曼光谱、热重分析、X射线衍射、SEM-EDX（扫描电子显微镜-能量色散X射线光谱）和粒度分析进行表征。研究了 U(VI) 在 Fe-SUC 上的吸附行为与水相中的 pH、接触时间和 U(VI) 浓度的函数关系。U(VI) 的吸附随着水相 pH 值的增加而增加，并且在 pH = 6 时发生吸附饱和。获得的 U(VI) 在 Fe-SUC 上吸附的动力学数据用伪第一模拟阶和伪二阶速率模型。相似地，U(VI) 吸附等温线符合 Langmuir、Freundlich、Temkin 和 Dubinin-Radushkevich 吸附等温线模型。U(VI) 在 Fe-SUC 上的 Langmuir 吸附容量约为 176 mg g-1. 在存在几种可能的干扰离子的情况下，评估了吸附剂对 U(VI) 的选择性。吸附的 U(VI) 用 0.5 M 碳酸钠溶液回收，并测试用过的吸附剂的可重复使用性。

"点击查看英文标题和摘要"

Efficient and selective adsorption of U(VI) by succinic acid modified iron oxide adsorbent

The iron oxide surface was modified with succinic acid moiety and the adsorbent obtained, Fe-SUC, was evaluated for the adsorption of U(VI) (Uranium (VI)) from aqueous solution. The Fe-SUC was characterized by FT-IR (Fourier Transform Infrared Spectroscopy), Raman spectroscopy, thermogravimetry, X-ray diffraction, SEM-EDX (Scanning Electron Microscope - Energy-dispersive X-ray Spectroscopy), and particle size analysis. The adsorption behavior of U(VI) on Fe-SUC was studied as a function of pH, contact time, and concentration of U(VI) in the aqueous phase. The adsorption of U(VI) increased with increase in the pH of aqueous phase, and the adsorption saturation occurred at pH = 6. The kinetic data obtained for the adsorption of U(VI) on Fe-SUC were modeled with the pseudo-first-order and pseudo-second-order rate models. Similarly, the U(VI) adsorption isotherm was fitted with Langmuir, Freundlich, Temkin, and Dubinin-Radushkevich adsorption isotherm models. The Langmuir adsorption capacity of U(VI) on Fe-SUC was about ∼176 mg g−1. The selectivity of the adsorbent toward U(VI) was evaluated in the presence of several possible interfering ions. The adsorbed U(VI) was recovered by 0.5 M sodium carbonate solution and the spent adsorbent was tested for its reusability.

更新日期：2022-04-18

点击分享查看原文

点击收藏

阅读更多本刊新发论文本刊介绍/投稿指南