Rational design of cobalt sulfide anchored on nitrogen-doped carbon derived from cyanobacteria waste enables efficient activation of peroxymonosulfate for organic pollutants oxidation

Ronghan Wang; Zixiang He; Wenjun Wang; Jiaqi Bu; Dongbo Wang; Guangming Zeng; Chengyun Zhou; Weiping Xiong; Yang Yang

doi:10.1016/j.chemosphere.2022.137733

Rational design of cobalt sulfide anchored on nitrogen-doped carbon derived from cyanobacteria waste enables efficient activation of peroxymonosulfate for organic pollutants oxidation

Chemosphere. 2023 Feb:314:137733. doi: 10.1016/j.chemosphere.2022.137733. Epub 2023 Jan 2.

Authors

Ronghan Wang¹, Zixiang He¹, Wenjun Wang², Jiaqi Bu³, Dongbo Wang¹, Guangming Zeng¹, Chengyun Zhou⁴, Weiping Xiong⁵, Yang Yang⁶

Affiliations

¹ College of Environmental Science and Engineering, Hunan University and Key Laboratory of Environmental Biology and Pollution Control (Hunan University), Ministry of Education, Changsha 410082, PR China.
² School of Resources and Environment, Hunan University of Technology and Business, Changsha 410205, PR China.
³ College of Chemistry and Chemical Engineering, Central South University, Changsha 410083, PR China.
⁴ College of Environmental Science and Engineering, Hunan University and Key Laboratory of Environmental Biology and Pollution Control (Hunan University), Ministry of Education, Changsha 410082, PR China; Jiangxi Province Key Laboratory of Drinking Water Safety, Nanchang, 330013, Jiangxi Province, PR China. Electronic address: zhouchengyun@hnu.edu.cn.
⁵ College of Environmental Science and Engineering, Hunan University and Key Laboratory of Environmental Biology and Pollution Control (Hunan University), Ministry of Education, Changsha 410082, PR China. Electronic address: xiongweiping@hnu.edu.cn.
⁶ Department of Chemical and Materials Engineering, University of Alberta, Edmonton, Alberta T6G 1H9, Canada. Electronic address: yyang34@ualberta.ca.

PMID: 36603681
DOI: 10.1016/j.chemosphere.2022.137733

Abstract

With the increasing of eutrophication in water body, algae blooms have become one of the global environmental problems. The cyanobacteria waste has placed a severe burden on the environment and transforming cyanobacteria into functional materials may be a wise approach. Herein, cobaltous sulfide/nitrogen-doped biochar (N-BC/CoS_x) composite was synthesized by pyrolysis of cyanobacteria waste. The N-BC/CoS_x showed excellent performance in peroxymonosulfate (PMS) activation for enrofloxacin (ENR) degradation, which could remove more than 90% ENR within 60 min. The influencing factors of pH and catalyst dosage on ENR removal efficiency were studied. The N-BC/CoS_x showed good recyclability in the cycle runs. The radicals (O₂^•-, OH andSO₄^•-) and the non-radical species (charge transfer and ¹O₂) were generated in the ENR degradation. The cycle of Co(II)/Co(III) m ay contribute to the radical generation process. This work proved that metal sulfide modified cyanobacteria biochar has a specific application value in water pollution control and provides a new method for resource utilization of cyanobacteria.

Keywords: Cobaltous sulfide; Cyanobacteria waste biochar; Enrofloxacin degradation; Peroxymonosulfate activation.

MeSH terms

Carbon*
Cobalt
Environmental Pollutants*
Nitrogen
Peroxides

Substances

Carbon
biochar
peroxymonosulfate
cobaltous sulfide
Environmental Pollutants
Nitrogen
Peroxides
Cobalt