Adsorption and Desorption Behavior of Cr(VI) on Two Typical UV-Aged Microplastics in Aqueous Solution

Langmuir, Год журнала: 2024, Номер unknown

Опубликована: Дек. 16, 2024

Microplastics (MPs) are novel pollutants that can adsorb heavy metals in water environments and migrate together as carriers prone to aging due the light water. However, few reports have been published on synergistic behavior effects of these different types aged MPs adsorption desorption Cr(VI). Here, two MP types─polyamide (PA) polylactic acid (PLA)─were by UV irradiation, behaviors Cr(VI) were studied. The results indicated rapidly age MPs. After exposed light, their specific surface area, negative charge, oxygenic groups increased, resulting enhanced hydrophilicity. depicted a markedly capacity for compared with aged-PA > pristine-PA aged-PLA pristine-PLA. process followed Langmuir pseudo-second-order models, confirming chemical monolayer primary processes involved was more easily desorbed simulated gastric fluid environment. rate lower than pristine because stronger binding forces mainly depends mechanisms such electrostatic attraction, reduction reactions, chelation groups. This study clarifies reciprocity mechanism between provides further insights guidance controlling joint pollution metal future.

Язык: Английский

Evaluation of the migration behaviour of microplastics as emerging pollutants in freshwater environments

Environmental Science and Pollution Research, Год журнала: 2024, Номер unknown

Опубликована: Сен. 19, 2024

Язык: Английский

Microplastic pollution unveiled: the consequences of small unregulated dumping in villages, spanning from soil to water

Environmental Monitoring and Assessment, Год журнала: 2024, Номер 196(12)

Опубликована: Ноя. 5, 2024

Язык: Английский