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Influence of cephalexin on cadmium adsorption onto microplastic particles in water: Human health risk evaluation
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Researchers studied how the antibiotic cephalexin influences the adsorption of the toxic metal cadmium onto polyethylene microplastics in water. They found that smaller microplastic particles absorbed more cadmium, and that the combined presence of cadmium and microplastics poses health risks, particularly for children exposed through contaminated groundwater. The study provides evidence that microplastics can act as carriers for heavy metals, potentially increasing human exposure to toxic substances.
This paper explores the impact of environmental factors on the adsorption of cadmium (Cd) and cephalexin (CEX) onto polyethylene (PE) microplastics. The study focused on Cd adsorption behavior on microplastics (MPs) of various sizes, revealing that particles sized 30-63 μm exhibited the highest adsorption capacity compared to other sizes. Cd sorption was significantly influenced by initial pH and salinity levels. Experimental data closely matched both the Langmuir (R2 > 0.91) and Freundlich (R2 > 0.92) isotherms. Cd adsorption onto PE particles was greater than CEX adsorption, with the maximum Cd uptake capacity measured at 1.8 mg/g. FTIR analysis indicated that Cd and CEX adsorption onto MPs was likely governed by physical interactions, as no new functional groups were detected post-uptake. The desorption rates of Cd and CEX from PE microplastics were evaluated in various liquids, including aqueous solution, tap water, seawater, and synthetic gastric juice. The health risks associated with Cd, in combination with MPs and CEX, for both children and adults were assessed in groundwater and aqueous solutions. This study offers scientific insights and guidelines for examining the environmental behavior, migration, and transformation of microplastics and their related ecological risks in scenarios of combined pollution.
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Researchers studied how the antibiotic levofloxacin sticks to PVC microplastics in water and how the presence of heavy metals affects this process. They found that certain metals like copper, zinc, and chromium increased the amount of antibiotic absorbed by the plastic, while cadmium and lead reduced it. The findings reveal that microplastics can act as carriers for both antibiotics and metals in polluted water, potentially creating complex contamination scenarios.
Effects of heavy metals on the adsorption of ciprofloxacin on polyethylene microplastics: Mechanism and toxicity evaluation
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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.
Effect of cadmium on the sorption of tylosin by polystyrene microplastics
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Researchers found that cadmium ions significantly influence the sorption of the antibiotic tylosin onto polystyrene microplastics, with competitive and cooperative interactions depending on concentration ratios, highlighting that co-contamination with heavy metals alters microplastic-mediated antibiotic transport in aquatic environments.
Adsorption behavior of aged polybutylece terephthalate microplastics coexisting with Cd(II)-tetracycline
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Researchers studied how aged polybutylene terephthalate microplastics interact with cadmium and the antibiotic tetracycline in water, finding that weathered microplastics adsorb these pollutants more readily than pristine ones. The study suggests that aging changes the surface properties of microplastics, increasing their capacity to carry heavy metals and antibiotics and potentially amplifying their environmental toxicity.
Evaluation of Cd Adsorption Characteristic by Microplastic Polypropylene in Aqueous Solution
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Researchers examined how microplastic polypropylene particles adsorb cadmium from aqueous solutions, finding that the plastic acts as a carrier for this toxic heavy metal. The results suggest that microplastics can accumulate cadmium in aquatic environments and potentially deliver it to organisms that ingest the particles.
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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.