A closed-loop strategy for ciprofloxacin adsorption and degradation by acetic acid/H<sub>2</sub>O<sub>2</sub>modified biochar

Shen Feiyue; Liu Shuyan; Liu Zhanglin; Wei Jiangtao; Huang Mei; He Jinsong; Zhang Yanzong; Hu Jinguang; Tian Dong; Shen Fei

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A closed-loop strategy for ciprofloxacin adsorption and degradation by acetic acid/H₂O₂modified biochar

Updated：2026-03-13

- A closed-loop strategy for ciprofloxacin adsorption and degradation by acetic acid/H₂O₂modified biochar
- Chinese Journal of Chemical Engineering Vol. 89, Issue 1, Pages: 314-323(2026)
- Affiliations：
  
  College of Environmental Sciences, Sichuan Agricultural University, Chengdu 611130, China
  Sichuan Provincial Engineering Research Center of Agricultural Non-point Source Pollution Control, Sichuan Agricultural University, Chengdu 611130, China
  Department of Chemical and Petroleum Engineering, University of Calgary, 2500 University Dr. NW, Calgary, AB T2N 1N4, Canada
- Author bio：
  
  Corresponding author. E-mail address: fishen@sicau.edu.cn(F. Shen).
- Funds：
- DOI：
  CLC：
- Received：06 July 2025，
  
  Revised：2025-08-16，
  
  Accepted：18 August 2025，
  
  Online First：16 October 2025，
  
  Published：2026-01
- Accepted：
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Shen Feiyue, Liu Shuyan, Liu Zhanglin, et al. A closed-loop strategy for ciprofloxacin adsorption and degradation by acetic acid/H₂O₂modified biochar[J]. Chinese Journal of Chemical Engineering, 2026, 89(1): 314-323.
DOI：

Shen Feiyue, Liu Shuyan, Liu Zhanglin, et al. A closed-loop strategy for ciprofloxacin adsorption and degradation by acetic acid/H₂O₂modified biochar[J]. Chinese Journal of Chemical Engineering, 2026, 89(1): 314-323. DOI：

摘要

Abstract

Economical and sustainable wastewater treatment techniques are highly demanded to alleviate the issues of clearwater scarcity globally. In this work

the acetic acid/H

(AHP)was leveraged to enrich oxygenated functional groups on the biochar surface for efficient ciprofloxacin (CIP) adsorption and biochar regeneration (

In situ

degradation of CIP in the spent AHP solution). The AHP-modified biochar exhibited significantly enhanced CIP adsorption capacity

about 22 times that of the pristine biochar. The optimized modification condition (acetic acid/H

: 2.11

temperature: 45

◦

and time: 12 h) was screened by the response surface method

reaching the highest CIP adsorption capacity of 86.26 mg·g

- 1

. Characterization results revealed that the content of carb

oxyl―C=O―O was enhanced in AHP-modified biochar

which contributed to efficient CIP adsorption by the electrostatic interaction

hydrogen bonding

and hydrophobic interaction. The adsorption of modified biochar to CIP molecules was a spontaneous endothermic process

and in line with the pseudo-second-order model and the Langmuir isotherm model. Moreover

the biochar modification process enabled the spent AHP solution with a strong oxidizing agent of peracetic acid (PAA)

which can be employed to degrade adsorbed CIP for biochar

in-situ

generation. This work tailored a closed-loop strategy for biochar oxidation

contaminant adsorption

and biochar regeneration

highlighting a viable route for sustainable wastewater treatment.

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⁰

A closed-loop strategy for ciprofloxacin adsorption and degradation by acetic acid/H2O2modified biochar

DOI：

摘要

Abstract

关键词

Keywords

references

A closed-loop strategy for ciprofloxacin adsorption and degradation by acetic acid/H₂O₂modified biochar