Tailoring biochar supported iron nanoparticles to activate persulfate for atrazine degradation in soil
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING(2024)
Abstract
Persulfate (PS)-based advanced oxidation processes have attracted significant attention in the field of organic contaminant remediation. In this study, we developed a biochar-supported Fe nanoparticle catalyst (FeNPs@BC) characterized by a substantial quantity of Fe-0, with the purpose of activating persulfate to facilitate the degradation of atrazine (ATZ) in soil. The results revealed that the 800 degrees C pyrolyzed FeNPs@BC-PS system, incorporating 2 wt% FeNPs@BC and 3 mmol/L PS, achieved rapid removal of ATZ (100%) within 10 min (k(obs)=0.19023 min(-1)). Active-species quenching experiments and electron spin resonance (ESR) demonstrated the presence of sulfate radicals (SO4 center dot-), hydroxyl radicals (center dot OH), and singlet oxygen (O-1(2)) in the FeNPs@BC-PS system. Furthermore, FeNPs@BC maintained a high catalytic activity even after four cycles of recycling. And the catalyst exhibited efficiency in degrading three other triazine herbicides (simazine, terbuthylazine, and ametryn). Notably, toxicity prediction experiments on the degradation products indicated lower toxicity compared to that of the parent ATZ. In summary, this study presents a promising solution for the development of an economical, efficient, and environmentally friendly technology capable of rapidly degrading soil herbicides.
MoreTranslated text
Key words
Biochar,Efficient degradation,Advanced oxidation processes,Atrazine,Soil
AI Read Science
Must-Reading Tree
Example
![](https://originalfileserver.aminer.cn/sys/aminer/pubs/mrt_preview.jpeg)
Generate MRT to find the research sequence of this paper
Chat Paper
Summary is being generated by the instructions you defined