文献类型：期刊文献

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

作者：Fenglei Liu[1,2];Shanshan Wang[1];Chaofeng Zhao[3];Baowei Hu[1]

机构：[1]School of Life Science,Shaoxing University,Huancheng West Road 508,Shaoxing 312000,People’s Republic of China;[2]Key Laboratory of Ministry of Education for Advanced Catalysis Materials,Institute of Physical Chemistry,Zhejiang Normal University,Jinhua 321004,People’s Republic of China;[3]MOE Key Laboratory of Resources and Environmental Systems Optimization,College of Environment and Chemical Engineering,North China Electric Power University,Beijing 102206,People’s Republic of China

年份：2023

卷号：5

期号：1

起止页码：542

中文期刊名：Biochar

外文期刊名：生物炭（英文）

收录：Scopus、CSCD2023_2024、CSCD、PubMed

基金：Zhejiang Provincial Natural Science Foundation of China under Grant No.LQ23B060002;China Postdoctoral Science Foundation under Grant No.2021M702911.

语种：英文

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

中文摘要：Herein,a biochar-based composite(Ti_(3)C_(2)T_(x)@biochar-PDA/PEI)was constructed by decorating Ti_(3)C_(2)T_(x) 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 Ti_(3)C_(2)T_(x)@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 Ti_(3)C_(2)T_(x)@biochar-PDA/PEI as an effective remediation strategy for radioactive wastewater cleanup.