文献类型：期刊文献

英文题名：Immobilizing nZVI particles on MBenes to enhance the removal of U(VI) and Cr(VI) by adsorption-reduction synergistic effect

作者：Liu, Fenglei[1,2];Lou, Yiting[1];Xia, Fang[1];Hu, Baowei[1]

机构：[1]Shaoxing Univ, Sch Life Sci, Huancheng West Rd 508, Shaoxing 312000, Peoples R China;[2]Zhejiang Normal Univ, Inst Phys Chem, Key Lab, Minist Educ Adv Catalysis Mat, Jinhua 321004, Peoples R China

年份：2023

卷号：454

外文期刊名：CHEMICAL ENGINEERING JOURNAL

收录：SCI-EXPANDED(收录号：WOS:000895932600001)、、EI(收录号：20224713140304)、Scopus(收录号：2-s2.0-85141975068)、WOS

基金：We gratefully thank the Research Fund Program of National Natural Science Foundation of China (No. 41907106) , the China Postdoctoral Science Foundation (2021M702911) and the Zhejiang Public Welfare Technology Application and Social Development Project (LGF21C030001) .

语种：英文

外文关键词：MBenes; nZVI; Reduction; Uranium(VI); Chromium(VI)

外文摘要：Herein, a novel collaborative strategy for enhancing the removal of U(VI)/Cr(VI) was developed through loading nZVI into the inter-layer structure of MBenes. Spectroscopic analysis elucidated that MBenes not only inhibited the oxidation of nZVI, but also effectively improved its reactivity. Batch experiments showed that the removal rate of targeted pollutants by nZVI@MBenes was higher than that of nZVI or MBenes due to the increment of active sites and extension of interlayer space. With the aid of kinetics and isotherms, which manifested that the adsorption data were fitted for the Langmuir and Pseudo-second-order kinetic models. Meanwhile, nZVI@M-Benes afforded the largest saturated capacity of 107.8 mg/g for U(VI) and 68.6 mg/g for Cr(VI). Synergistic adsorption-reduction occurred during the elimination process based on characterization analysis and DFT calculation. Namely, the targeted pollutants were rapidly adsorbed by the as-prepared composites via electro-static interaction, then the surface-associated nZVI acted as an electron donor to reduce Cr(VI) to Cr(III) and U (VI) to U(IV). Thus, this work would open a new window for the practical application of nZVI-based materials in wastewater treatment.