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Insight into enhanced degradation of tetracycline over peroxymonosulfate activated via biochar-based nanocomposite: performance and mechanism

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Abstract

Rice husk biochars (BCs) doped with ferric chloride were prepared by one-pot method, characterized by SEM, EDS, BET, XRD, and FTIR, and utilized to catalyze peroxymonosulfate (PMS) for tetracycline (TC) degradation. Various influencing factors in the BC/PMS/TC system were investigated, as well as the recycling performance of the optimal BC. The mechanism of BC activation of PMS and degradation of TC were analyzed based on the free radicals quenching experiment and the pathways of TC degradation. The results demonstrated that bBC3 was an excellent catalyst with large specific surface area; the amounts of oxidant and catalyst were important factors affecting the catalytic performance of PMS, while pH had less effect on TC degradation; 10 mM of chloride ions inhibited the TC degradation, while 20 mM promoted the TC degradation; other ions and humic acid inhibited the TC degradation at the set concentrations; activation of PMS by bBC3 yielded species with strong oxidative activity, which were primarily responsible for TC degradation. The bBC3 obtained stable performance for removing TC. This study provided a pathway for the deep utilization of waste rice husks besides an effective method for degrading TC.

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Funding

This work was comprehensively financially supported by the Education Department of Liaoning Province (JZL202015406), the Natural Science Foundation of Jilin Province (YDZJ202201ZYTS681), and the Outstanding Youth Program of Scientific Research Foundation of Department of Education of Hunan Province (20B505), China.

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TS: conceptualization, writing—review and editing, supervision. YG: experimental design, writing—original draft preparation. JY: experimental design, data curation, writing—review and editing. XZ: experimental design, formal analysis, data curation. RS: investigation, data curation. JL: investigation, data curation.

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Correspondence to Jian Ye.

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The authors declare no competing interests.

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Responsible Editor: Guilherme L. Dotto

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Highlights

• Peroxymonosulfate activated via biochar doped with FeCl3 facilitates the degradation of tetracycline.

• bBC3 with excellent pore structure exhibits the best tetracycline removal effect.

• Free radicals and non-free radicals are responsible for the oxidation of tetracycline jointly.

• Rice husk biochar applied in advanced oxidation is beneficial to deep utilization of agricultural waste.

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Song, T., Gao, Y., Ye, J. et al. Insight into enhanced degradation of tetracycline over peroxymonosulfate activated via biochar-based nanocomposite: performance and mechanism. Environ Sci Pollut Res 30, 27394–27408 (2023). https://doi.org/10.1007/s11356-022-24102-5

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  • DOI: https://doi.org/10.1007/s11356-022-24102-5

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