Effects of humic acid on Pb²⁺ adsorption onto polystyrene microplastics from spectroscopic analysis and site energy distribution analysis.

ABSTRACT: Microplastics (MPs), act as vectors of heavy metal pollutants in the environment, is of practical significance to study the adsorption process and mechanism on heavy metals. In this study, polystyrene microplastics (PSMPs) were used as model MPs to study the adsorption of Pb²⁺ on PSMPs and the effects of humic acid (HA) on the adsorption process. The results showed that HA promoted the adsorption of Pb²⁺ on PSMPs, and the higher the concentration of HA, the greater the adsorption of Pb²⁺. With the increase of pH value and decrease of ionic strength, the adsorption capacity of PSMPs for Pb²⁺ increased. The scanning electron microscope equipped with the energy dispersive spectroscope (SEM-EDS), fourier transform-infrared spectra (FT-IR) and X-ray p

SUBMITTER: Lu X 

PROVIDER: S-EPMC9142603 | biostudies-literature | 2022 May

REPOSITORIES: biostudies-literature