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Bacteria-based biochar as a persulfate activator to degrade organic pollutants.
- Source :
- Environmental Science & Pollution Research; Jul2023, Vol. 30 Issue 35, p83289-83301, 13p
- Publication Year :
- 2023
-
Abstract
- Carbon-based catalysts for activating persulfate to drive advanced oxidation processes (AOPs) are widely used in wastewater treatment. In this study, Shewanella oneidensis MR-1, a typical ferric reducing electroactive microorganism, was utilized as the raw material of biochar (BC) to prepare a novel green catalyst (MBC). The effect of MBC on activating persulfate (PS) to degrade rhodamine B (RhB) was evaluated. Experimental results showed that MBC could effectively activate PS to degrade RhB to reach 91.70% within 270 min, which was 47.4% higher than that of pure strain MR-1. The increasing dosage of PS and MBC could improve the removal of RhB. Meanwhile, MBC/PS can well perform in a wide pH range, and MBC showed good stability, achieving 72.07% removal of RhB with MBC/PS after 5 cycles. Furthermore, the free radical quenching test and EPR experiments confirmed the presence of both free radical and non-free radical mechanisms in the MBC/PS system, with •OH, SO<subscript>4</subscript><superscript>•−</superscript> and <superscript>1</superscript>O<subscript>2</subscript> contributing to the effective degradation of RhB. This study successfully provided a new application for bacteria to be used in the biochar field. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 09441344
- Volume :
- 30
- Issue :
- 35
- Database :
- Complementary Index
- Journal :
- Environmental Science & Pollution Research
- Publication Type :
- Academic Journal
- Accession number :
- 165110771
- Full Text :
- https://doi.org/10.1007/s11356-023-28202-8