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61,005 resultsShowing papers similar to Effects of polyvinylchloride microplastics on the toxicity of nanoparticles and antibiotics to aerobic granular sludge: Nitrogen removal, microbial community and resistance genes
ClearEffects of microplastics accumulation and antibiotics contamination in anaerobic membrane bioreactors for municipal wastewater treatment
This study found that when aged PVC microplastics and the antibiotic ciprofloxacin are both present in wastewater treatment systems, they interact to make each other's harmful effects worse. The combination cut treatment efficiency in half and disrupted the microbes needed for wastewater processing, raising concerns about how microplastic pollution could undermine water treatment that protects public health.
Evaluation of microplastic polyvinylchloride and antibiotics tetracycline co-effect on the partial nitrification process
This study investigated the combined effects of PVC microplastics and the antibiotic tetracycline on nitrification — the biological process by which wastewater treatment plants remove ammonia from sewage. Both pollutants reduced nitrification efficiency, and their combined presence caused greater disruption than either alone, complicating the treatment of wastewater that contains multiple contaminants.
Microplastic biofilm may shape microbial community enriched with antibiotic resistance genes to enhance nitrogen transformation under antibiotic stress
This study found that biofilms growing on PVC microplastics in water helped remove nitrogen pollutants but also concentrated antibiotic resistance genes, with the same bacteria often carrying both pollution-cleaning and drug-resistance capabilities. The findings raise concerns that microplastic pollution in waterways could accelerate the spread of antibiotic-resistant bacteria, which poses a growing threat to human health.
Co-occurrence of microplastics and triclosan inhibited nitrification function and enriched antibiotic resistance genes in nitrifying sludge
Researchers found that co-exposure to four types of microplastics (PE, PS, PVC, and PA) and the antimicrobial agent triclosan inhibited nitrification function and enriched antibiotic resistance genes in nitrifying sludge from wastewater treatment. The combined presence of microplastics and triclosan posed greater risk to biological wastewater treatment performance than either contaminant alone.
Short-term influence of polytetrafluoroethylene micro/nano-plastics on the inhibition of copper and/or ciprofloxacin on the nitrifying sludge activities based on concentration addition and independent action models.
This study examined how polytetrafluoroethylene (PTFE) micro/nanoplastics modify the toxicity of copper and ciprofloxacin to nitrifying bacteria in wastewater sludge, finding complex interactions where PTFE particles altered the inhibitory effects of these pollutants on key nitrogen-cycling microbes.
Effects of polyvinyl chloride microplastics and benzylalkyldimethylethyl compounds on system performance, microbial community and resistance genes in sulfur autotrophic denitrification system
Researchers found that PVC microplastics and a common disinfectant chemical in wastewater treatment systems promoted the spread of antibiotic resistance genes, with the disinfectant having an even stronger effect than the microplastics. The microplastic surfaces harbored disease-causing bacteria that carried these resistance genes. This is concerning because wastewater treatment plants could be releasing both microplastics and antibiotic-resistant pathogens into waterways, potentially threatening human health.
Effect of polytetrafluoroethylene nanoplastics on combined inhibition of ciprofloxacin and bivalent copper on nitrogen removal, sludge activity and microbial community in sequencing batch reactor
Researchers examined how polytetrafluoroethylene (PTFE) nanoplastics modify the combined toxicity of ciprofloxacin and bivalent copper on nitrogen removal in a sequencing batch reactor, finding that PTFE nanoplastics adsorbed both contaminants and enhanced their joint inhibition of nitrification and denitrification, reducing ammonia nitrogen elimination and altering the sludge microbial community.
Microplastics shaped performance, microbial ecology and community assembly in simultaneous nitrification, denitrification and phosphorus removal process
This study found that polystyrene and PVC microplastics disrupted the performance of wastewater treatment systems designed to remove nitrogen and phosphorus, reducing nitrogen removal by up to 10%. The microplastics altered microbial communities, decreased cooperation between beneficial bacteria, and blocked important biological pathways. Since wastewater treatment is a key barrier against pollution reaching drinking water, microplastic interference with these systems could indirectly increase human exposure to harmful contaminants.
Response of wastewater treatment performance and bacterial community to original and aged polyvinyl chloride microplastics in sequencing batch reactors
This study found that PVC microplastics, both fresh and aged, severely harmed wastewater treatment processes by reducing the removal of harmful chemicals like ammonia and organic pollutants. The microplastics shifted the bacterial communities in the treatment system, reducing helpful nitrogen-removing bacteria while promoting other types. This means microplastic contamination of wastewater plants could lead to poorer water treatment quality, allowing more pollutants to reach rivers and drinking water sources.
Responses of nitrogen removal, microbial community and antibiotic resistance genes to biodegradable microplastics during biological wastewater treatment
Researchers compared the effects of three biodegradable microplastics on nitrogen removal and microbial communities in activated sludge wastewater treatment. They found that PHA and PLA at higher concentrations enhanced denitrification but also promoted antibiotic resistance genes, while PBS had minimal effects. The study suggests that the breakdown of biodegradable plastics into microplastics in wastewater systems may have complex and sometimes counterintuitive effects on treatment performance.
Insight into effect of polyethylene microplastic on nitrogen removal in moving bed biofilm reactor: Focusing on microbial community and species interactions
Researchers studied how polyethylene microplastics affect nitrogen removal in wastewater treatment bioreactors and found that low concentrations slightly improved the process, while higher concentrations disrupted it. The microplastics changed the microbial communities responsible for breaking down nitrogen in wastewater. This matters because less effective wastewater treatment means more nitrogen pollution in waterways, and microplastics entering treatment plants could reduce their ability to clean water effectively.
Impact and microbial mechanism of continuous nanoplastics exposure on the urban wastewater treatment process
Researchers investigated the effects of continuous nanoplastic exposure on wastewater treatment over 200 days, finding that while total nitrogen removal was not significantly inhibited, nanoplastics altered microbial community composition and affected nitrification and denitrification processes.
Mechanistic insights into the impact of multi-dimensional microplastic stress on nitrogen removal by heterotrophic nitrifying-aerobic denitrifying bacteria: A meta-transcriptomic analysis
Researchers studied how different types of microplastics affect bacteria that are used to remove nitrogen from wastewater. They found that PVC microplastics were particularly disruptive, interfering with enzyme function and gene expression needed for denitrification. The study provides molecular-level insights into how microplastic pollution could undermine biological wastewater treatment systems.
Unraveling individual and combined toxicity of nano/microplastics and ciprofloxacin to Synechocystis sp. at the cellular and molecular levels
Researchers studied the individual and combined toxic effects of nano- and microplastics with the antibiotic ciprofloxacin on a freshwater cyanobacterium. They found that while each pollutant caused harm on its own, the antibiotic actually showed an antagonistic interaction with the plastic particles, reducing some of their combined toxicity. The study provides important insights into how microplastics and pharmaceutical pollutants interact in aquatic environments, which may complicate pollution risk assessments.
Microplastics in granular sequencing batch reactors: Effects on pollutant removal dynamics and the microbial community
Researchers investigated how polyethylene and polyethylene terephthalate microplastics affect pollutant removal in granular sludge wastewater treatment reactors. They found that microplastic type and concentration influenced nitrogen, phosphorus, and organic compound removal rates, with PET particles showing a stronger tendency to accumulate within the biomass. The study indicates that microplastic contamination in wastewater treatment systems may compromise treatment efficiency and alter microbial community dynamics.
Collaborative removal of microplastics, bacteria, antibiotic resistance genes, and heavy metals in a full-scale wastewater treatment plant
Researchers tracked how a full-scale wastewater treatment plant in China simultaneously removes microplastics, bacteria, antibiotic resistance genes, and heavy metals, finding that while the plant removed over 80% of incoming microplastics, those that remained in the effluent were associated with elevated levels of antibiotic resistance genes and heavy metals. Microplastics appeared to serve as carriers that concentrate and co-transport these co-contaminants through treatment processes. This raises important concerns: even "clean" treated wastewater discharged into rivers may carry microplastics loaded with antibiotic-resistant bacteria and toxic metals.
Mechanisms underlying the detrimental impact of micro(nano)plastics on the stability of aerobic granular sludge: Interactions between micro(nano)plastics and extracellular polymeric substances
Researchers found that both micro- and nanoplastics at realistic concentrations harmed the performance of aerobic granular sludge, a technology used for wastewater treatment, by reducing its ability to remove nitrogen. The plastic particles interacted with the sticky substances that hold the sludge granules together, weakening their structural integrity. The study reveals a specific mechanism by which plastic pollution can undermine wastewater treatment systems that communities rely on for clean water.
Effects of heavy metals on the adsorption of ciprofloxacin on polyethylene microplastics: Mechanism and toxicity evaluation
Researchers studied how heavy metals in water affect the ability of polyethylene microplastics to absorb the antibiotic ciprofloxacin. They found that heavy metals competed with the antibiotic for binding sites on the microplastic surface, changing how much of each pollutant the plastic could carry. This is important because it shows microplastics in real-world environments may transport different combinations of pollutants, potentially delivering both antibiotics and heavy metals into the food chain.
Microplastics affect the ammonia oxidation performance of aerobic granular sludge and enrich the intracellular and extracellular antibiotic resistance genes
Exposure of aerobic granular sludge to PVC, PA, PS, and PE microplastics at 10 mg/L inhibited ammonia oxidation but nitrification recovered over time; all four MP types enriched intracellular and extracellular antibiotic resistance genes and suppressed ammonia-oxidizing bacteria.
Microplastics accelerate nitrification, shape the microbial community, and alter antibiotic resistance during the nitrifying process
Researchers found that adding microplastics to wastewater treatment systems actually sped up nitrification (a key step in processing sewage) but also promoted the growth of antibiotic-resistant bacteria. Even biodegradable PLA plastics, often considered more environmentally friendly, significantly increased antibiotic resistance genes. This study warns that microplastics in wastewater systems could be accelerating the spread of antibiotic resistance, a major public health threat.
Responses of bacterial communities and resistance genes on microplastics to antibiotics and heavy metals in sewage environment
Polyvinyl chloride microplastics in sewage enriched pathogenic bacteria and antibiotic resistance genes on their surfaces, and the presence of heavy metals and antibiotics altered but did not eliminate this enrichment over time. The findings suggest microplastics in wastewater environments could facilitate the spread of antibiotic resistance through the microbial community.
Characterization of microplastics and their interaction with antibiotics in wastewater
Researchers characterized microplastics in wastewater and investigated their interactions with antibiotics, examining how microplastic surfaces adsorb antibiotic compounds and the implications for antibiotic transport and dissemination in wastewater treatment systems.
Aged microplastics enhance their interaction with ciprofloxacin and joint toxicity on Escherichia coli
Researchers found that aged microplastics showed enhanced adsorption of the antibiotic ciprofloxacin compared to pristine particles, and that their combined exposure produced greater toxicity to E. coli at the molecular level than either pollutant alone.
The occurence of pharmaceuticals and other micropollutants in wastewater treatment plant in the aspect of interaction with microplastics
Researchers analysed the occurrence of antibiotics, virucidal, and fungicidal pharmaceuticals in raw and treated sewage at a wastewater treatment plant in southern Poland, examining their removal efficiency and potential interactions with microplastics present in the effluent. The study found that pharmaceutical micropollutants persisted through treatment to varying degrees, raising concerns about combined contamination pathways when microplastics act as co-vectors for these compounds.