Xinrui Lin, Zhipeng Xu, Feng Lin, Peizu Ruan, Ting Li, Shiying Chen, Qidong Yin*, Kai He* and Shanquan Wang,
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Encapsulated Hydrogels Enhance Sulfamethoxazole Removal via Structure-Driven Microbial Metabolisms
The widespread occurrence of antibiotics in aquatic environments poses serious ecological and public health risks, necessitating advanced treatment strategies. Biohydrogels present a versatile platform for enhancing the removal of sulfamethoxazole (SMX) by combining adsorption with microbial degradation. In this study, polyvinyl alcohol-sodium alginate (PVA-SA) hydrogels were used to immobilize anaerobic sludge, forming two hydrogel systems (gel7.5 and gel9) with distinct physical structures. Both systems achieved significantly higher SMX removal efficiencies (90.2 and 87.7%) compared with the control (67.7%). Metagenomic analysis revealed differential enrichment of key SMX-degrading genera, with Lentimicrobium dominant in gel7.5 and Pseudomonas and Acinetobacter enriched in gel9. Functional gene profiling further indicated that gel7.5 and gel9 favored distinct monooxygenase pathways for SMX transformation. These results demonstrate that the hydrogel composition shapes microbial community function and biodegradation mechanisms, offering an effective and adaptable solution for treating antibiotic-contaminated wastewater while mitigating the risk of resistance gene dissemination.
期刊介绍：
ACS ES&T Engineering publishes impactful research and review articles across all realms of environmental technology and engineering, employing a rigorous peer-review process. As a specialized journal, it aims to provide an international platform for research and innovation, inviting contributions on materials technologies, processes, data analytics, and engineering systems that can effectively manage, protect, and remediate air, water, and soil quality, as well as treat wastes and recover resources.
The journal encourages research that supports informed decision-making within complex engineered systems and is grounded in mechanistic science and analytics, describing intricate environmental engineering systems. It considers papers presenting novel advancements, spanning from laboratory discovery to field-based application. However, case or demonstration studies lacking significant scientific advancements and technological innovations are not within its scope.
Contributions containing experimental and/or theoretical methods, rooted in engineering principles and integrated with knowledge from other disciplines, are welcomed.
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