生物炭
吸附
朗缪尔吸附模型
热解
密度泛函理论
化学
傅里叶变换红外光谱
拉曼光谱
碳化
材料科学
X射线光电子能谱
碳纤维
化学工程
分析化学(期刊)
物理化学
有机化学
计算化学
复合材料
复合数
工程类
物理
光学
作者
Zheng Fang,Yurong Gao,Fangbin Zhang,Kaipeng Zhu,Zihan Shen,Haixia Liang,Yue Xie,Yu Chen,Yanping Bao,Bo Feng,Nanthi Bolan,Hailong Wang
标识
DOI:10.1016/j.envpol.2022.119819
摘要
Garden pruning waste is becoming a problem that intensifies the garbage siege. It is of great significance to purify polluted water using biochar prepared from garden pruning waste. Herein, the interaction mechanism between BPS and oriental plane tree biochar (TBC) with different surface functional groups was investigated by adsorption experiments, spectroscopic analysis and theoretical calculations. Adsorption kinetics and isotherm of BPS on TBC can be satisfactorily fitted into pseudo-second-order kinetic and Langmuir models, respectively. A rapid adsorption kinetic toward BPS was achieved by TBC in 15 min. As compared with TBC prepared at low temperature (300 °C) (LTBC), the maximum adsorption capacity of TBC prepared at high temperature (600 °C) (HTBC) can be significantly improved from 46.7 mg g-1 to 72.9 mg g-1. Besides, the microstructure and surface functional groups of HTBC were characterized using SEM, BET-N2, and XPS analysis. According to density functional theory (DFT) theoretical calculations, the higher adsorption energy of HTBC for BPS was mainly attributed to π-π interaction rather than hydrogen bonding, which was further supported by the analysis of FTIR and Raman spectra as well as the adsorption thermodynamic parameters. These findings suggested that by improving π-π interaction through high pyrolysis temperature, BPS could be removed and adsorbed by biochar with high efficacy, cost-efficiency, easy availability, and carbon-negative in nature, contributing to global carbon neutrality.
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