The adsorption mechanisms of oriental plane tree biochar toward bisphenol S: A combined thermodynamic evidence, spectroscopic analysis and theoretical calculations

Zheng Fang; Yurong Gao; Fangbin Zhang; Kaipeng Zhu; Zihan Shen; Haixia Liang; Yue Xie; Chenglong Yu; Yanping Bao; Bo Feng; Nanthi Bolan; Hailong Wang

doi:10.1016/j.envpol.2022.119819

The adsorption mechanisms of oriental plane tree biochar toward bisphenol S: A combined thermodynamic evidence, spectroscopic analysis and theoretical calculations

Environ Pollut. 2022 Oct 1:310:119819. doi: 10.1016/j.envpol.2022.119819. Epub 2022 Jul 20.

Authors

Zheng Fang¹, Yurong Gao², Fangbin Zhang³, Kaipeng Zhu³, Zihan Shen³, Haixia Liang³, Yue Xie³, Chenglong Yu⁴, Yanping Bao³, Bo Feng⁵, Nanthi Bolan⁶, Hailong Wang⁷

Affiliations

¹ Biochar Engineering Technology Research Center of Guangdong Province, Physical Science Public Platform, School of Environmental and Chemical Engineering, Foshan University, Foshan 528000, China; Guangdong Green Technologies Co., Ltd., Foshan, 528100, China.
² Biochar Engineering Technology Research Center of Guangdong Province, Physical Science Public Platform, School of Environmental and Chemical Engineering, Foshan University, Foshan 528000, China; Agronomy College, Shenyang Agricultural University, Shenyang, 110866, China.
³ Biochar Engineering Technology Research Center of Guangdong Province, Physical Science Public Platform, School of Environmental and Chemical Engineering, Foshan University, Foshan 528000, China.
⁴ School of Land Resources and Environment, Jiangxi Agricultural University, Nanchang 330045, China.
⁵ College of Environment and Resources, Xiangtan University, Xiangtan 411105, China.
⁶ School of Agriculture and Environment, The University of Western Australia, Perth, WA 6001, Australia; The UWA Institute of Agriculture, The University of Western Australia, Perth, WA 6001, Australia.
⁷ Biochar Engineering Technology Research Center of Guangdong Province, Physical Science Public Platform, School of Environmental and Chemical Engineering, Foshan University, Foshan 528000, China; Guangdong Green Technologies Co., Ltd., Foshan, 528100, China. Electronic address: hailong.wang@fosu.edu.cn.

PMID: 35870525
DOI: 10.1016/j.envpol.2022.119819

Abstract

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-N_2, 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.

Keywords: DFT calculations; Green waste; Plasticizer; Pyrolysis; π-π interaction.

MeSH terms

Adsorption
Carbon
Charcoal
Kinetics
Phenols
Sulfones
Thermodynamics
Trees*
Water Pollutants, Chemical*

Substances

Phenols
Sulfones
Water Pollutants, Chemical
biochar
Charcoal
Carbon
bis(4-hydroxyphenyl)sulfone