Sensors and Actuators Reports, Journal Year: 2024, Volume and Issue: 8, P. 100241 - 100241

Published: Aug. 30, 2024

Microplastics (MPs) are global pollutants found in various environmental compartments, including oceans, freshwater bodies, soils, and air. Their persistence potential to adsorb heavy metals raise significant concerns regarding water quality ecosystem health. Understanding the interaction between MPs is crucial for assessing risks developing remediation strategies. In this study, we use electroanalytical techniques investigate adsorption of metal ions— Cr³⁺, Zn²⁺, Ni²⁺—by polystyrene with different surface functionalizations: carboxyl, amino, unfunctionalized. We conducted electrodeposition ions on a gold ultramicroelectrode both before after mixing MPs. Following this, used anodic stripping voltammetry measure change electrodeposited charge (ΔQ). This difference, observed MPs, was analyzed understand kinetics dynamics. Our experiments revealed that carboxyl-functionalized exhibited highest ΔQ due strong electrostatic attraction ions, values 1.67 ×, 1.50 1.22 × greater than those amino-MPs Ni²⁺, respectively. Amino-MPs displayed considerable ion adsorption, suggesting poor repulsion two positively charged entities. Interestingly, unfunctionalized which had negative similar carboxyl-MPs, showed characteristics, lower all ions. study underscores role functionalization efficiency by It also demonstrates utility understanding ion-MP interactions, offering insights into impacts strategies, as well electrochemical sensors detecting adsorbed

Language: Английский