AI Article Synopsis
- Advancements in biochar for activating persulfate (PS) processes show promise for treating wastewater, particularly focused on tetracycline (TC) contamination.
- The study compares two types of biochar—regular (BC) and nitrogen-doped (NBC)—highlighting that NBC changes the activation mechanism of PS, impacting treatment effectiveness.
- The BC-PS system mainly uses a radical pathway for pollutant removal, while the NBC-PS system utilizes a stable non-radical pathway, demonstrating better performance and resistance to interference in organic wastewater treatment.
Article Abstract
Advancements in biochar activating persulfate advanced oxidation processes (PS-AOP), have gained significant attention. However, the understanding of biochar-based catalysts in activating PS remains limited. Herein, biochar (BC) and N-doped biochar (NBC) were synthesized from hemp for activating PS to treat tetracycline (TC) wastewater and analyzed their mechanisms separately. Surprisingly, N-doped in biochar leads to a change in the activation mechanism of PS. The BC-PS system operates mainly through a radical pathway, advantageous for treating soil organic pollution (68%) with pH adaptability (less than 10% variation). Nevertheless, the NBC-PS system primarily employs an electron transfer non-radical pathway, demonstrating stability (only 7% performance degradation over four cycles) and enhanced resistance to anionic interference (less than 10% variation) in organic wastewater treatment. This study provides a technical reference and theoretical foundation for enhancing biochar activation of PS in the removal of organic pollutants from aquatic and terrestrial environments.
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| http://dx.doi.org/10.1016/j.biortech.2024.130684 | DOI Listing |
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