Adsorption of lead(II) onto PE microplastics as a function of particle size: Influencing factors and adsorption mechanism.
Chemosphere
; 304: 135276, 2022 Oct.
Article
en En
| MEDLINE
| ID: mdl-35690170
ABSTRACT
The adsorption of Pb ions, on high-density polyethylene (PE) microplastics (MPs) with the diameter of 48-500 µm, was examined in this study. According to the Langmuir isotherm, MP of the smallest size, 48 µm, had the greatest adsorption capacity of 0.38 µmol g-1. The mechanism of Pb ions adsorption onto PE MPs was chemical adsorption, in particular, hydrogen bonding and surface complexation. Pb adsorption onto PE particles was proceeded at a rapid rate, as predicted by the pseudo-second-order rate model (R2 > 0.99). The PE 48 µm had the maximum adsorption capacity of 0.44 µmol g-1 (or 0.2 mol m-2) at pH 5. While humic acid can operate as a bridging agent, boosting heavy metal adsorption on the surface of PE MPs, fulvic acid has the reverse effect. The findings indicated that PE particles may serve as a carrier of heavy metals in the aquatic environment, posing perceived risks to the environment and public health.
Palabras clave
Texto completo:
1
Banco de datos:
MEDLINE
Asunto principal:
Contaminantes Químicos del Agua
/
Metales Pesados
Tipo de estudio:
Prognostic_studies
Idioma:
En
Revista:
Chemosphere
Año:
2022
Tipo del documento:
Article
País de afiliación:
Taiwán