期刊
BIORESOURCES
卷 17, 期 4, 页码 5958-5983出版社
NORTH CAROLINA STATE UNIV DEPT WOOD & PAPER SCI
DOI: 10.15376/biores.17.4.5958-5983
关键词
Amino-silane; Aminated lignin; Metal ions; Adsorption mechanism; Adsorption isotherm
资金
- National Research Foundation of Korea (NRF) - Korea government (MSIT) [2021R1A2C2008178]
- Ministry of Education [2018R1A6A1A03025582]
- National Research Foundation of Korea [2021R1A2C2008178] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
Aminated lignins exhibited optimal adsorption capacities for Cd(II) and Pb(II) metal ions under neutral conditions, with the primary amine group showing the highest adsorption capacities. The adsorption behaviors followed Langmuir isotherm and pseudo-second-order kinetics, and the thermodynamic studies revealed that the adsorption processes were spontaneous and endothermic. These results demonstrate that aminated lignins are promising adsorbents for the removal of Cd(II) and Pb(II) metal ions.
Lignin is a renewable natural aromatic polymer that is generated as a co-product during lignocellulosic biorefinery processes, and it has been applied widely as a functional biomaterial. In this study, the adsorption behavior of Cd(II) and Pb(II) metal ions was investigated via ion chelation using aminated lignins (ALs) with primary, secondary, and tertiary amine groups. ALs exhibited optimal Cd(II) and Pb(II) adsorption capacities in solution under neutral conditions due to their chelating, electrostatic, and cationic-pi interactions with metal ions. The AL with the primary amine group showed the highest adsorption capacities for both Cd(II) and Pb(II), reaching 83.2 and 159.7 mg.g(-1), respectively, followed by the ALs with secondary and tertiary amine groups. The adsorption kinetics and isotherm analysis demonstrated that all adsorption behaviors followed the Langmuir isotherm and pseudo-second-order kinetics. Thermodynamic studies revealed that the adsorption processes of Cd(II) and Pb(II) using the ALs were spontaneous and endothermic. These results demonstrate that ALs are promising adsorbents for the removal of Cd(II) and Pb(II) metal ions.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据