Desorption of bisphenol A from microplastics under simulated gastrointestinal conditions

Microplastics are prevalent in the environment and have a strong affinity to pollutants owing their large specific surface area hydrophobicity. Once ingested, microplastics transport into organisms. This study investigated bisphenol A (BPA) desorption behavior from three microplastic materials, namely, polystyrene (PS), polypropylene (PP), polyamide (PA), under simulated biological gastrointestinal conditions. The results showed that BPA can rapidly desorb carriers conditions, with different percentages order of PP > PS PA. was related amorphous structure functional groups polymers. gastric juices not significantly affected by pH; however, within pH range intestinal juices, percentage increased as increased. increase Na + concentration tract exhibited certain inhibitory effect on salting-out effect. temperature digestive positively desorption, suggesting endothermic organisms more susceptible it. Our findings help elucidate potential health risks exposure sorbed environment.