文献类型：期刊文献

英文题名：Constructing coconut shell biochar/MXenes composites through self-assembly strategy to enhance U(VI) and Cs(I) immobilization capability

作者：Liu, Fenglei[1,2];Wang, Shanshan[1];Zhao, Chaofeng[3];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;[3]North China Elect Power Univ, Coll Environm & Chem Engn, MOE Key Lab Resources & Environm Syst Optimizat, Beijing 102206, Peoples R China

年份：2023

卷号：5

期号：1

外文期刊名：BIOCHAR

收录：SCI-EXPANDED(收录号：WOS:001000363600001)、、Scopus(收录号：2-s2.0-85160931253)、WOS

基金：This research was supported by Zhejiang Provincial Natural Science Foundation of China under Grant No. LQ23B060002 and the China Postdoctoral Science Foundation under Grant No. 2021M702911.

语种：英文

外文关键词：Biochar; MXene; Adsorption; U(VI); Cs(I)

外文摘要：Herein, a biochar-based composite (Ti3C2Tx@biochar-PDA/PEI) was constructed by decorating Ti3C2Tx and polydopamine on coconut shell biochar via electrostatic self-assembly method. Different characterization techniques were applied to explore the structure, morphology and composition of the sorbents. It was found that the higher porosity and diverse functional groups were conducive for Ti3C2Tx@biochar-PDA/PEI to capture radionuclides, and the water environmental conditions made a great contribution to the adsorption process. The process of removing U(VI)/Cs(I) well complied with the Langmuir isotherm and Pseudo-second-order equations, which indicated that the single layer chemical adsorption occurred on the solid liquid interface. Meanwhile, this produced composite exhibited superior removal performance under complex co-existing ion environment, and the maximum adsorption amounts of U(VI) and Cs(I) reached up to 239.7 and 40.3 mg g(-1). Impressively, this adsorbent still exhibited good adsorption performance after three cycles of regeneration. The spectral analysis and DFT calculation demonstrated that adsorption of U(VI) might be a chemical process, while the adsorption of Cs(I) should be ion exchange or electrostatic attraction. This study demonstrated the potential application of Ti3C2Tx@biochar-PDA/PEI as an effective remediation strategy for radioactive wastewater cleanup.