文献类型：期刊文献

英文题名：Efficient U(VI) removal by Ti3 C2 Tx nanosheets modified with sulfidated nano zero-valent iron: Batch experiments, mechanism, and biotoxicity assessment

作者：Liang, Liping[1,2,3];Zhou, Mengfan[2];Xi, Fenfen[3];Bai, Chaoqi[2];Wang, Shenghua[2];Luo, Shuyun[2];Liu, Jingqi[2];Hu, Yangyang[2];Zeng, Yuxuan[2];Yang, Wangliang[2];Hu, Baowei[2]

机构：[1]Changzhou Univ, Sch Environm Sci & Engn, Changzhou 213164, Peoples R China;[2]Shaoxing Univ, Sch Life & Environm Sci, Shaoxing 312000, Peoples R China;[3]Donghua Univ, Coll Chem & Chem Engn, Shanghai 201620, Peoples R China

年份：2025

卷号：152

起止页码：563

外文期刊名：JOURNAL OF ENVIRONMENTAL SCIENCES

收录：SCI-EXPANDED(收录号：WOS:001362287100001)、、EI(收录号：20242516284523)、Scopus(收录号：2-s2.0-85196187679)、WOS

基金：This research was supported by the National Natural Sci-ence Foundation of China (No. 42277063) , the Postdoctoralr Research Foundation of China (No. 2021M702886) , the Lead-ing Innovative Talents cultivation Project of Changzhou City (No. CQ20230096) , and the Research Initiation Project of Changzhou University.

语种：英文

外文关键词：Sulfidated nano zero-valent iron; Adsorption; Reduction; Biological toxicity; U(VI)

外文摘要：The MXenes, a new class of two-dimensional layered materials, have found extensive applications in water treatment for its excellent thermal stability, electrical conductivity, and excellent adsorption ability. Sulfidized nano zero-valent iron (S-nZVI) is a good reducing agent, however, the practical application of S-nZVI is currently restricted due to the tendency of nano materials to agglomerate. Herein, MXenes use as a support and in situ loading S-nZVI on it to prepare a new material (S-nZVI/Ti3 C2 Tx ), and applied it to U(VI) removal in water treatment. The microscopic characterization proves that S-nZVI on Ti3 C2 Tx has good dispersion and effectively alleviates agglomeration. Batch experiments shown that SnZVI/Ti3 C2 Tx has a very good effect on U(VI) removal, and the maximum adsorption capacity reaches 674.4 mg/g under the aerobic condition at pH = 6.0. The pseudo-second-order kinetic model and the Langmuir isotherm model were found to be more appropriate for describing the adsorption behavior. This indicates that the removal process is a single molecular layer chemisorption. Moreover, the S-nZVI/Ti3 C2 Tx maintained a removal efficiency of over 85 % for U(VI) even after being reused five times, demonstrating its excellent reusability. It is worth noting that the material can remove 79.8% of 50 mg/L of U(VI) in simulated seawater, indicating that S-nZVI/Ti3 C2 Tx possessed an excellent uranium extraction performance from seawater. Experimental results and XPS analysis showed that U(VI) was removed by adsorption, reduction and co-precipitation. Moreover, S-nZVI/Ti3 C2 Tx was a low toxicity material to hyriopsis cumingii . Therefore, S-nZVI/Ti3 C2 Tx was expected to be a candidate as adsorbent with great potential in removal of uranium from wastewater and seawater. (c) 2024 The Research Center for Eco-Environmental Sciences, Chinese Academy of