We can't find the internet
Attempting to reconnect
Something went wrong!
Hang in there while we get back on track
Unveiling Impact of Polyamide Microplastics on Ceftiofur Sodium Migration in Porous Media: Experimental and Modeling Insights
AI summary Read the abstract
Laboratory experiments showed that polyamide microplastics in soil slow the movement of the antibiotic ceftiofur sodium through porous ground layers, retaining more of the drug as microplastic concentrations increase. This matters because microplastics could extend the persistence of antibiotics in agricultural soils, potentially worsening antibiotic resistance in soil microbes and groundwater.
Polyamide (PA) and cephalosporin, specifically ceftiofur sodium (CTFS), are commonly found in soil environments. The impact of microplastics on the transport of cephalosporin cannot be disregarded due to their surface hydrophobicity and large specific surface area. This study investigates the influence of PA microplastics on the transport of CTFS in porous media through a combination of experimental and numerical modeling approaches, investigating how environmental factors affect CTFS transport. The adsorption of CTFS on PA is inversely correlated with the increase in ionic strength, specifically with the presence of Na+, Ca2+ and Ba2+ ions. This suggests a significant impact of ionic strength on the adsorption process. Experimental findings indicate that higher mass fractions of PA result in greater retention of CTFS within the columns. Conversely, elevated flow velocities and initial CTFS concentrations facilitate the migration of CTFS in PA-silica sand (SS) mixed porous media. Additionally, the migration of CTFS is modeled using the advection–dispersion equation (ADE) with first-order kinetics, yielding a coefficient of determination (R2) exceeding 0.95. Subsequently, the correlation between kinetic parameters of CTFS and various environmental factors such as PA%, flow velocity, initial concentration, and ionic types and strengths is determined. These results contribute to a deeper understanding of the environmental interactions between microplastic particles and antibiotics within porous media, and offer a scientific foundation for precise forecasting and evaluation of the environmental hazards posed by microplastic contamination in soil-groundwater system.
More Papers Like This
Microplastic migration in porous media at various scales: a review
AI summary Read the abstract
Researchers reviewed how microplastics move through porous media like soil and sediment across multiple spatial scales, finding that particle surface properties and environmental conditions both influence migration but remain poorly understood. Better understanding of this process is critical for assessing how microplastics spread through terrestrial and groundwater environments.
Interaction Between Polyurethane Microplastics and Ciprofloxacin: A Study on Adsorption Behaviour and Ecological Implications
AI summary Read the abstract
Polyurethane microplastics adsorb the antibiotic ciprofloxacin, creating combined pollutant complexes with potential ecological implications for aquatic environments. This interaction highlights how microplastics can serve as carriers for toxic co-contaminants, amplifying environmental risks beyond what either pollutant poses alone.
Interaction Between Polyurethane Microplastics and Ciprofloxacin: A Study on Adsorption Behaviour and Ecological Implications
AI summary Read the abstract
Polyurethane microplastics demonstrate significant adsorption capacity for the antibiotic ciprofloxacin, suggesting that plastic particles in aquatic environments can act as vectors for pharmaceutical pollutants. This interaction raises ecological concerns about the combined toxicity of microplastic-antibiotic complexes in waterways and their potential impacts on aquatic organisms and antimicrobial resistance.
Transport Modeling of Microplastic Particles in Fractured Porous Media
AI summary Read the abstract
Researchers modeled the transport behavior of microplastic particles through fractured porous media such as soil and rock, addressing how poor plastic waste management accelerates microplastic contamination of groundwater and subsurface environments with serious implications for both ecosystems and human health.
Transport of Colloidal Microplastics Through Porous Media
AI summary Read the abstract
Researchers conducted column experiments to study how polystyrene microbeads move through quartz sand media, finding that microplastics are retarded by solid-phase sorption and hypothesizing that transport is most efficient through coarse-grained, well-sorted soils, with implications for predicting microplastic fate in terrestrial environments.
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.