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The combined effects of microplastics and tetracycline on reactor performance and the fate of antibiotic resistance genes during the sludge anaerobic digestion
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Isoliensinine, a plant-derived alkaloid, inhibits oral squamous cell carcinoma cell growth by activating the MAPK signaling pathway through microRNA-mediated mechanisms, triggering ROS accumulation, mitochondrial apoptosis, and cell cycle arrest. While not directly related to microplastic pollution, the study demonstrates microRNA pathways as targets relevant to understanding plastic-induced cellular toxicity mechanisms.
The combined impact of MPs and TC on ARG enrichment in sludge during mesophilic AD, where low-abundance bacteria may serve as potential hosts, warrants greater attention.
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Microplastics deteriorate the removal efficiency of antibiotic resistance genes during aerobic sludge digestion
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Polypropylene and polyethylene microplastics added to aerobic sludge digesters significantly reduced the removal efficiency of antibiotic resistance genes during digestion, with plastic particles enriching resistant bacteria on their surfaces and impeding the normal treatment-associated decline in ARG abundance, posing a risk for sludge land application.
From wastewater to sludge: The role of microplastics in shaping anaerobic digestion performance and antibiotic resistance gene dynamics
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This review examines how microplastics in wastewater treatment plants affect the anaerobic digestion process used to break down sewage sludge, finding that certain plastic types can either boost or reduce biogas production depending on conditions. Importantly, microplastics increased the abundance of antibiotic resistance genes by up to 514%, raising serious concerns that wastewater treatment -- meant to protect public health -- may instead become a breeding ground for antibiotic-resistant bacteria when microplastics are present.
Deciphering the role of polyethylene microplastics on antibiotic resistance genes and mobile genetic elements fate in sludge thermophilic anaerobic digestion process
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Researchers investigated how polyethylene microplastics affect antibiotic resistance genes and mobile genetic elements during sewage sludge thermophilic anaerobic digestion. The study found that microplastic contamination increased the abundance of antibiotic resistance genes and showed a strong positive correlation between microplastic concentration and mobile genetic element content, suggesting microplastics may promote the spread of antibiotic resistance.
[Effects of Typical Microplastics on Methanogenesis and Antibiotic Resistance Genes in Anaerobic Digestion of Sludge].
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Researchers explored the impacts of polyamide, polyethylene, and polypropylene microplastics on methanogenesis and antibiotic resistance gene dynamics during anaerobic digestion of waste sludge, examining how microplastic contamination affects both biogas production and resistance gene enrichment.
Insight into effects of polyethylene microplastics in anaerobic digestion systems of waste activated sludge: Interactions of digestion performance, microbial communities and antibiotic resistance genes
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Polyethylene microplastics in anaerobic digestion systems processing waste activated sludge increased hydrolysis efficiency at 1 mm particle sizes but also altered microbial community composition and enriched antibiotic resistance genes. The findings suggest that MPs in sludge management pose risks for spreading ARGs through land application of digested biosolids.
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When a large batch of papers lands in the Atlas, we read through it and send a short write-up of what stood out.