We can't find the internet
Attempting to reconnect
Something went wrong!
Hang in there while we get back on track
Microplastics and antibiotic resistance genes in landfills: interaction mechanisms, environmental risks, and composite pollution implications
AI summary Read the abstract
This review pulls together existing research showing that landfills are hotspots where tiny plastic bits (microplastics) and antibiotic-resistant bacteria mix and interact, the plastic surfaces can act like rafts that help bacteria share drug-resistant genes with each other. While scientists worry these combined pollutants could eventually travel through soil and water into our food supply, the direct link to human exposure hasn't been proven yet, so this is more of an early warning sign than a confirmed health threat. It highlights why better waste management and standardized research methods are needed to get ahead of this potential problem.
Microplastics (MPs) and antibiotic resistance genes (ARGs) widely coexist and interact in landfills, forming novel composite pollution. This review reveals their occurrence characteristics, migration mechanisms, interaction risks, and ecological threats in landfills. Landfills accumulate MPs, primarily composed of polyethylene, polypropylene, and polystyrene, with abundance and fragmentation increasing with depth. They migrate via leachate while undergoing continuous aging, and their dispersion is further exacerbated by reduced particle size and enhanced surface hydrophilicity. Meanwhile, aged MPs can provide attachment surfaces for plastisphere-like biofilms and may serve as carriers for pathogens and bacteria because of their large specific surface area and oxygen-containing functional groups. MP-associated biofilms may facilitate horizontal gene transfer (HGT) by increasing microbial contact opportunities and, under some experimental conditions, by promoting oxidative stress responses and membrane permeability changes. ARGs spread across species via HGT and show a significant association with heavy metals. Concomitantly, heavy metal resistance genes may modulate ARG expression, while ARG abundance is also influenced by landfill age, seasonal variations, and pH. Coexistence of MPs, ARGs, and heavy metals triggers co-selection pressure, amplifying composite pollution. Composite pollutants may migrate through soil-water systems and potentially enter food webs, with possible accumulation in organisms; however, evidence directly linking landfill-derived pollutants to human tissue exposure remains limited. The concealed and complex pollution hinders remediation, necessitating coordinated solutions. The lack of detailed policies, standardized methodologies, and inconsistent research strategies hinder cross-study comparisons. This article is aimed at summarizing the occurrence, migration, and interaction patterns of emerging pollutants in landfills and at providing a basis for systematic management and future risk warning.
More Papers Like This
Microplastics and antibiotic resistance genes as rising threats: Their interaction represents an urgent environmental concern
AI summary Read the abstract
This review examines how microplastics interact with antibiotics and antibiotic-resistant bacteria in the environment, creating a combined pollution threat. Microplastics can absorb antibiotics onto their surface and serve as platforms where bacteria exchange resistance genes. This interaction could accelerate the spread of antibiotic resistance, making infections harder to treat and posing a growing public health risk.
Insight into combined pollution of antibiotics and microplastics in aquatic and soil environment: Environmental behavior, interaction mechanism and associated impact of resistant genes
AI summary Read the abstract
This review examines the combined pollution created when microplastics absorb antibiotics in water and soil environments. Researchers found that microplastics can concentrate antibiotics on their surfaces, and this combination promotes the spread of antibiotic-resistant genes in microbial communities. The study highlights that the interaction between these two emerging pollutants may pose greater environmental and health risks than either one alone.
Microplastics as carriers of antibiotic resistance genes and pathogens in municipal solid waste (MSW) landfill leachate and soil: a review
AI summary Read the abstract
This review examines how microplastics in landfill leachate and soil can serve as carriers for antibiotic resistance genes and disease-causing bacteria. Researchers describe how microplastic surfaces create favorable environments for bacterial colonization and gene transfer, potentially spreading antimicrobial resistance. The study highlights an underappreciated pathway through which plastic waste in landfills may contribute to the broader antibiotic resistance crisis.
The Microplastic–biofilm–resistome Nexus: the Role of Environmental Microplastics in the Formation and Dissemination of Antibiotic-resistant Bacteria and the Potential Consequences for Human Health
AI summary Read the abstract
Tiny plastic bits (microplastics) that end up in water and soil aren't just pollution, they can act like rafts where bacteria cluster together and swap genes that help them resist antibiotics. This review pulls together existing research suggesting these plastic "biofilms" could be a hidden pathway for drug-resistant germs to spread through the environment and potentially reach humans. While more research is needed to confirm real-world health risks, it's a reminder that plastic pollution and the growing problem of antibiotic resistance may be more connected than we think.
The Microplastic–biofilm–resistome Nexus: the Role of Environmental Microplastics in the Formation and Dissemination of Antibiotic-resistant Bacteria and the Potential Consequences for Human Health
AI summary Read the abstract
Tiny plastic particles floating in water and soil aren't just pollution, they can act like rafts where bacteria cluster together and swap genes that help them resist antibiotics. This review pulls together existing research suggesting that these plastic-bacteria communities could be a hidden pathway for drug-resistant "superbugs" to spread through the environment and potentially reach humans. While more research is needed to confirm the real-world health risk, it's a reminder that plastic pollution may have ripple effects beyond what we can see.
Research digests by email
When a large batch of papers lands in the Atlas, we read through it and send a short write-up of what stood out.