Work

Adsorption mechanism of cadmium on polystyrene microplastics containing hexabromocyclododecane

Year: 2021

Type: article

Abstract: There are few studies on the adsorption of heavy metals by microplastics containing additives in water environment. The present study investigated the adsorption mechanism of Cd(II) on polystyrene microplastics containing hexabromocyclododecane (PS-HBCD MPs). In the experiments, the effects of pH value, salinity, particle size and dissolved organic matter derived from PS-HBCD MPs on the adsorption capacity were analyzed. Scanning electron microscopy (SEM), Fourier transform infrared spectroscopy (FTIR) and X-ray photoelectron spectroscopy (XPS) were used to analyze the properties of PS-HBCD MPs and adsorption behavior of Cd(II) onto MPs. The adsorption kinetics and isotherms of Cd(II) onto PS-HBCD MPs can be described well by the pseudo-second-order kinetics model and Langmuir isotherm model, respectively. Solution pH, salinity, dissolved organic matter derived from MPs and particle size have a greater impact on the adsorption behavior of cadmium on microplastics. The results of this study highlight the importance of C-Br bonds of PS-HBCD MPs in controlling the adsorption of Cd(II).

Source: Environmental Technology & Innovation

DOI: 10.1016/j.eti.2021.102036

Authors: Anqi Yu, Xuan Sun, Shuai Tang, Yuanyuan Zhang, Mengyao Li, Xuesong Wang

Institution: Jiangsu Ocean University

Language: English

Topic: Microplastics and Plastic Pollution

Subfield: Pollution

Field: Environmental Science

Domain: Physical Sciences

SDG: Clean water and sanitation

Open Access status: hybrid

Estimated APC paid: $2,610