文献类型：期刊文献

英文题名：High efficient removal of U(VI) by covalent organic frameworks fabricated by mechanochemical method: Adsorption process, mechanism and surface complexation modeling

作者：Guo, Weijuan[1];Yan, Ling[1,3];Qian, Jianhua[1,2];Luo, Can[1,2];Ren, Ye[1,2];Xie, Wei[1,2];Cai, Jianfen[1,2];Ding, Jing[1,2];Qiu, Muqing[1];Hu, Baowei[1]

机构：[1]Shaoxing Univ, Sch Life Sci, Shaoxing 312000, Peoples R China;[2]Shaoxing Keqiao Jiangbin Water Treatment Co LTD, Shaoxing 312000, Peoples R China;[3]Bur Ecol & Environm Shaoxing City, Shaoxing 312000, Peoples R China

年份：2023

卷号：11

期号：3

外文期刊名：JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING

收录：SCI-EXPANDED(收录号：WOS:001042536900001)、、EI(收录号：20231413846750)、Scopus(收录号：2-s2.0-85151477020)、WOS

基金：Financial supported from Natural Science Foundation of Zhejiang Province, China (No. LGF20C030001) are acknowledged.

语种：英文

外文关键词：Covalent organic framework; Mechanochemical method; U(VI); Adsorption mechanism; Surface complexation modeling; Environmental cleanup

外文摘要：Herein, covalent organic frameworks (i.e., TpBD) were fabricated by mechanical delamination of 1, 3, 5-triformylphloroglucinol (Tp) and benzidine (BD) using NaHCO3 as foaming agent. The batch characterizations revealed that flower-like TpBD nanosheets exhibited the large porosity, high BET specific area (139 m2/g), small pore size (- 14 & ANGS;), remarkable stability and keto form. The adsorption process of U(VI) removal by TpBD displayed the fast sorption rate (equilibrium within 0.5 h), high adsorption capacity (167 mg/g) and good reusability (no significant difference after five cycles). According to analysis of X-ray photoelectron spectroscopy (XPS) and surface complexation modeling, the removal mechanism of U(VI) by TpBD was chemisorption and inner-sphere surface complexation. These findings are of great importance for the application of covalent organic frameworks fabricated with rapid and easy-to-operate mechanochemical method in actual environmental cleanup.