生物炭
吸附
热解
水溶液中的金属离子
化学
亚甲蓝
朗缪尔吸附模型
水溶液
动力学
木质纤维素生物量
核化学
生物高聚物
比表面积
化学工程
金属
无机化学
有机化学
催化作用
发酵
物理
聚合物
光催化
量子力学
工程类
作者
Jing Li,Fanxun Lv,Rudong Yang,Liping Zhang,Wei Tao,Guotao Liu,Hui Gao,Ying Guan
出处
期刊:Polymers
[MDPI AG]
日期:2022-09-17
卷期号:14 (18): 3889-3889
被引量:8
标识
DOI:10.3390/polym14183889
摘要
Medulla tetrapanacis is composed of a lignocellulosic biopolymer and has a regular porous structure, which makes it a potential biomass material for preparing porous N-doped biochar. Herewith, N-doped Medulla tetrapanacis biochar (UBC) was successfully prepared by modification with urea and NaHCO3 under pyrolysis at 700 °C. The nitrogen-containing groups were efficiently introduced into biochar, and the micro-pore structures of the UBC were developed with sizeable specific surface area, which was loaded with massive adsorption sites. The adsorption kinetics and isotherms of the UBC conformed to pseudo-second-order and Langmuir model. The superior adsorption capacities of the UBC for methylene blue (MB) and congo red (CR) were 923.0 mg/g and 728.0 mg/g, and the capacities for Cu2+ and Pb2+ were 468.5 mg/g and 1466.5 mg/g, respectively. Moreover, the UBC had a stronger affinity for Cr3+ and Fe3+ in multiple metal ions and retained at a preferable adsorption performance for dyes and heavy metals after five cycles. Precipitation, complexation, and physical adsorption were the main mechanisms of the UBC-adsorbing metal ions and dyes. Thus, lignocellulosic biochar has great potential for removing dyes and heavy metals in aqueous solutions.
科研通智能强力驱动
Strongly Powered by AbleSci AI