Article ? AI-assigned paper type based on the abstract. Classification may not be perfect — flag errors using the feedback button. Tier 2 ? Original research — experimental, observational, or case-control study. Direct primary evidence. Remediation Sign in to save

Adsorption properties and influencing factors of antibiotics on microplastics under simulated gastric fluid environment

Environmental Geochemistry and Health 2025 1 citation ? Citation count from OpenAlex, updated daily. May differ slightly from the publisher's own count. Score: 53 ? 0–100 AI score estimating relevance to the microplastics field. Papers below 30 are filtered from public browse.

Boyan Liu, Hecheng Bai, Hecheng Bai, Alan Meng, Jie Jiang, Hecheng Bai, Hecheng Bai, Jie Jiang, Jiaqian Zhang, Yanxiao Jiang Boyan Liu, Boyan Liu, Jiaqian Zhang, Jiaqian Zhang, Yanxiao Jiang Yanxiao Jiang Hecheng Bai, Yanxiao Jiang Jie Jiang, Meng Xu, Hecheng Bai, Boyan Liu, Meng Xu, Yanxiao Jiang Yi Huang, Yi Huang, Yi Huang, Jiaqian Zhang, Boyan Liu, Alan Meng, Yanxiao Jiang Alan Meng, Yi Huang, Hecheng Bai, Hecheng Bai, Alan Meng, Yi Huang, Yi Huang, Meng Xu, Meng Xu, Xinpei Li, Xinpei Li, Yanxiao Jiang Yanxiao Jiang Meng Xu, Yanxiao Jiang Jie Jiang, Yanxiao Jiang

Summary

Researchers investigated how microplastics adsorb antibiotics under simulated human stomach conditions and found that aged microplastics had significantly greater adsorption capacity than pristine ones. Among the antibiotics tested, amoxicillin was most readily adsorbed by all three microplastic types studied, and adsorption capacity increased with smaller particle sizes and lower ionic strength.

Polymers

PLA PP PS

Body Systems

Digestive

Microplastics (MPs) and antibiotics (ATs) are emerging pollutants. Recent studies have confirmed that MPs can act as carriers for toxic pollutants, releasing and accumulating these substances within organisms upon ingestion. Additionally, MPs undergo aging processes within organisms, affecting their ability to adsorb pollutants. This study investigated the adsorption behavior of three aged MPs including polypropylene (PP), polylactic acid (PLA) and polystyrene (PS) for typical ATs in a simulated human gastric fluid environment. The results indicated that the adsorption capacity of MPs for ATs decreases slightly with increasing pH and significantly with higher ionic strength. Smaller particle sizes exhibited higher adsorption capacities. MPs aged in simulated gastric fluid exhibited significantly greater adsorption capacities than their original counterparts. Among the four antibiotics tested, amoxicillin (AMX), ciprofloxacin (CIP), levofloxacin (LEV), and sulfadiazine (SD), the three microplastics exhibited the highest adsorption capacity for AMX. The adsorption capacities were determined as follows: PP-AMX (1.65 mg g), PLA-AMX (1.47 mg g), and PS-AMX (1.48 mg g). Furthermore, the adsorption of ATs on aged MPs followed a pseudo-second-order model, and isotherm analysis aligned with the Freundlich model, suggesting a non-uniform, multilayer surface adsorption process. These findings deepen the understanding of interactions between aged MPs and ATs in the human gastric fluid environment and provide crucial information for ecological risk assessments of MPs.

Read via DOI PubMed

Share this paper

Post Share Share Pin Email