Dual roles of static magnetic field on enhancing sulfamethoxazole biodegradation and preventing antibiotic resistance genes transfer in halotolerant fungal-bacterial sludge treating saline aquaculture wastewater.

Authors

Zhen-Ying Li, You-Wei Cui, Rui-Chun Yang, Ya-Nan Mi, Yuan Sui

Published in

Bioresource technology. Pages 135312. Jul 05, 2026. Epub Jul 05, 2026.

Abstract

To address low biological treatment efficiency in saline antibiotic wastewater and antibiotic resistance gene (ARGs) transmission risk, a static magnetic field (SMF) was applied to a salt-tolerant fungal-bacterial consortium to enhance sulfamethoxazole (SMX) biodegradation; additionally, associated ARGs transmission risks were assessed. Results demonstrated that 40 mT was the optimal SMF intensity, under which the SMX degradation efficiency achieved a relative improvement of 62.8% compared to the control. At the mechanistic level, SMF alleviated oxidative stress by stimulating extracellular polymeric substance (EPS) secretion and upregulating antioxidant defenses, thereby reducing intracellular reactive oxygen species (ROS) accumulation. Furthermore, SMF significantly suppressed the absolute abundance of mobile genetic elements (MGEs), effectively restricting the horizontal gene transfer of ARGs. SMF application is an effective strategy for improving SMX removal and reducing ARGs transfer, providing new insights for developing advanced saline aquaculture wastewater biological treatment technologies.

PMID:
42402282
Bibliographic data and abstract were imported from PubMed on 06 Jul 2026.

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