摘要
分别以三乙烯四胺(TETA)和MgCl_(2)为氮源和Mg^(2+)源,通过N元素掺杂和Mg^(2+)修饰,制备了一种新型木质素基吸附剂。N掺杂木质素(N-Lignin)对As(Ⅴ)具有一定的选择性,Mg^(2+)修饰后(Mg@N-Lignin)进一步增强了该选择性。Mg@N-Lignin表现出良好的再生性能。Mg@N-Lignin对As(Ⅴ)的吸附等温线和动力学遵循Langmuir等温线模型和拟二阶动力学模型。Mg@N-Lignin对As(Ⅴ)的饱和吸附量为687.46 mg/g,并在30 min内达到平衡。
A novel lignin-based adsorbent was prepared by doped with N and modified with Mg^(2+),using thiethylenetetramine(TETA)and MgCl_(2)as the source of N and Mg^(2+),respectively.N-doped lignin(N-Lignin)shows certain selectivity for As(Ⅴ),which was further enhanced by modified with Mg^(2+)(Mg@N-Lignin).Mg@N-Lignin shows an excellent reusability.The adsorption isotherms and kinetics of Mg@N-Lignin for As(Ⅴ)follow Langmuir isotherms model and pseudo-second-order kinetics model,respectively.The adsorption of Mg@N-Lignin for As(Ⅴ)achieved a maximum adsorption capacity of 687.46 mg/g and established equilibrium within 30 min.
作者
高铃淑
石晓峰
王超
吴光平
GAO Ling-shu;SHI Xiao-feng;WANG Chao;WU Guang-ping(School of Environment and Safety Engineering,North University of China,Taiyuan 030051,China;Advanced Energy Materials and Systems Institute,North University of China,Taiyuan 030051,China;School of Materials Science and Engineering,North University of China,Taiyuan 030051,China;School of Chemical Engineering and Technology,North University of China,Taiyuan 030051,China)
出处
《应用化工》
CAS
CSCD
北大核心
2021年第11期2934-2940,共7页
Applied Chemical Industry
基金
国家自然科学基金(21706019)。
