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- Title
Adsorption of Polyethylene and Polyvinyl Chloride to Phthalate Esters.
- Authors
SUN Shu; MENG Shuo; ZHOU Zhenfeng
- Abstract
Microplastics that are ubiquitous in environmental media are considered to be effective carriers for the migration and transformation of organic pollutants. Exploring the interaction between microplastics and organic pollutants has become a research hotspot in the environmental field. In this paper, dimethyl phthalate (DMP) and diethyl phthalate (DEP) were selected as the target pollutants, and the adsorption behavior and mechanism of two typical microplastics polyethylene (PE) and polyvinyl chloride (PVC) to DMP and DEP were mainly studied. The results show that the two kinds of microplastics have adsorption capacity for DMP and DEP, and the adsorption capacity of PE is greater than that of PVC, which may be related to the type of microplastics and the specific surface area and porosity. The adsorption capacity of the same microplastic to DEP is greater than that of DMP, which is mainly related to the physical and chemical properties of pollutants. The pseudosecond-order model can well describe the adsorption kinetic process of two microplastics to DMP and DEP, both intraparticle and film diffusion could dominate the adsorption. The adsorption isotherm can be well fitted by the Linear model, the Langmuir model and the Freundlich model. The adsorption process is distributed by hydrophobicity. The role is dominant, and there may be a micropore filling effect.
- Subjects
POLYVINYL chloride; PLASTIC marine debris; POLLUTANTS; PHTHALATE esters; DIETHYL phthalate; ADSORPTION (Chemistry); ADSORPTION isotherms
- Publication
Environmental Science & Technology (10036504), 2022, Vol 45, Issue 8, p9
- ISSN
1003-6504
- Publication type
Article
- DOI
10.19672/j.cnki.1003-6504.0105.22.338