Fabrication of novel Fe/Mn/N co-doped biochar and its enhanced adsorption for bisphenol a based on π-π electron donor-acceptor interaction

Heng Ding; Zhilin Zhang; Yan Li; Lei Ding; Dongxiao Sun; Zhiqiang Dong

doi:10.1016/j.biortech.2022.128018

Fabrication of novel Fe/Mn/N co-doped biochar and its enhanced adsorption for bisphenol a based on π-π electron donor-acceptor interaction

Bioresour Technol. 2022 Nov:364:128018. doi: 10.1016/j.biortech.2022.128018. Epub 2022 Sep 23.

Authors

Heng Ding¹, Zhilin Zhang², Yan Li³, Lei Ding⁴, Dongxiao Sun⁵, Zhiqiang Dong⁵

Affiliations

¹ School of Civil Engineering and Architecture, Anhui University of Technology, Ma'anshan 243032, China.
² School of Civil Engineering and Architecture, Anhui University of Technology, Ma'anshan 243032, China; Jiangsu Branch, North China Municipal Engineering Design & Research Institute Co. Ltd., Nanjing 210019, China.
³ School of Civil Engineering and Architecture, Anhui University of Technology, Ma'anshan 243032, China; Engineering Research Center of Biofilm Water Purification and Utilization Technology of Ministry of Education, Anhui University of Technology, Ma'anshan 243032, China; Key Laboratory of Water Pollution Treatment and Resource Reuse of Hainan Province, Haikou 571158, China.
⁴ School of Civil Engineering and Architecture, Anhui University of Technology, Ma'anshan 243032, China; Engineering Research Center of Biofilm Water Purification and Utilization Technology of Ministry of Education, Anhui University of Technology, Ma'anshan 243032, China.
⁵ Municipal Environmental Protection Engineering Co., Ltd of CERC Shanghai Group, Shanghai 201906, China.

PMID: 36162783
DOI: 10.1016/j.biortech.2022.128018

Abstract

In this work, a novel Fe/Mn/N co-doped biochar (Fe&Mn-NBC₈₀₀) derived from waste apple tree branches was fabricated for bisphenol A (BPA) removal. Fe&Mn-NBC₈₀₀ exhibited higher adsorption capacity (84.96 mg·g^-1) in 318 K for BPA than the pristine biochar, doped mono-atomic, and di-atomic biochar. Higher temperature and adsorbent dosage promoted BPA removal, while higher solution pH was detrimental to the adsorption process. The kinetic and isothermal processes of BPA removal followed the pseudo-second-order model and Langmuir, respectively. Characterizations and correlation analysis indicated that π-π interactions showed the major contribution to the BPA adsorption. Furthermore, the pore filling, electrostatic interactions, hydrogen bonding, and hydrophobic interactions also played a role. Good water environment anti-interference ability (ion species, ionic strength, actual water body) and excellent recyclability of Fe&Mn-NBC₈₀₀ make it exhibit the potential for engineering projects.

Keywords: Adsorption; Agricultural waste; Bisphenol A (BPA); Fe/Mn/N co-doped biochar.