Performance and mechanism of sycamore flock based biochar in removing oxytetracycline hydrochloride

Hongkui Zhang; Xue Song; Jie Zhang; Yongde Liu; Hailiang Zhao; Junkai Hu; Jihong Zhao

doi:10.1016/j.biortech.2022.126884

Performance and mechanism of sycamore flock based biochar in removing oxytetracycline hydrochloride

Bioresour Technol. 2022 Apr:350:126884. doi: 10.1016/j.biortech.2022.126884. Epub 2022 Feb 24.

Authors

Hongkui Zhang¹, Xue Song², Jie Zhang³, Yongde Liu⁴, Hailiang Zhao¹, Junkai Hu¹, Jihong Zhao⁵

Affiliations

¹ College of Environmental Engineering, Henan University of Technology, Zhengzhou, Henan 450001, China.
² College of Environmental Engineering, Henan University of Technology, Zhengzhou, Henan 450001, China; Zhengzhou Key Laboratory of Organic Waste Resource Utilization, Zhengzhou, Henan 450001, China.
³ College of Food Science and Engineering, Henan University of Technology, Zhengzhou, Henan 450001, China.
⁴ College of Environmental Engineering, Henan University of Technology, Zhengzhou, Henan 450001, China; Zhengzhou Key Laboratory of Organic Waste Resource Utilization, Zhengzhou, Henan 450001, China. Electronic address: liuyongde@126.com.
⁵ Henan Radio and Television University, Zhengzhou, Henan 450001, China.

PMID: 35219786
DOI: 10.1016/j.biortech.2022.126884

Abstract

In this study, sycamore flocs (SF), which caused environmental and health problems, were utilized to prepare biochar. SFB_2-900 obtained under the conditions of activation agent K₂CO₃, pyrolysis temperature 900℃ and m(K₂CO₃):m(BC) 2 had the strongest adsorption capacity (730 mg/g) for oxytetracycline hydrochloride (OTC-HCl). The pseudo-second-order kinetic model and Langmuir model described the adsorption kinetics and isotherms best. SFB_2-900 exhibited high OTC-HCl adsorption capacity in both higher ionic strength and wide pH range. The theoretical simulation indicated that the closest interaction distance between OTC-HCl and SFB_2-900 was 2.44 Å via π-π stacking configuration. Pore filling, π-π electron donor acceptor (EDA) interaction, H-bonding and electrostatic interactions were also involved in the process of OTC-HCl removal. SFB_2-900 showed great removal efficiency for OTC-HCl in different water matrices and good regeneration ability. This study solved the problems caused by SF, realized waste biomass recycling, and achieved preparing high-efficient adsorbent for antibiotic.

Keywords: Adsorption; Biochar; DFT calculation; Oxytetracycline Hydrochloride; Sycamore Floc.

MeSH terms

Adsorption
Charcoal
Kinetics
Oxytetracycline* / analysis
Water Pollutants, Chemical* / analysis

Substances

Water Pollutants, Chemical
biochar
Charcoal
Oxytetracycline