Adsorption behavior of organic pollutants on microplastics

Binational survey of personal protective equipment (PPE) pollution driven by the COVID-19 pandemic in coastal environments: Abundance, distribution, and analytical characterization

“…The results of XRD show that there were changes in the intensity of signals of peaks of the XRD spectra of face mask samples compared to the XRD patterns. The degree of crystallinity of the polymers is another property that plays a role in the sorption of some contaminants as organic pollutants onto MPs ( Fu et al, 2021 , Torres et al, 2021 ). The sorption mechanisms of the organic pollutants onto plastic particles are conditioned by the degree of crystallinity of the plastics, where the absorptive partitioning mechanism is predominant in amorphous polymers, and surface adsorption occurs on polymers with a high degree of crystallinity ( Yao et al, 2021 ).…”

“…The sorption mechanisms of the organic pollutants onto plastic particles are conditioned by the degree of crystallinity of the plastics, where the absorptive partitioning mechanism is predominant in amorphous polymers, and surface adsorption occurs on polymers with a high degree of crystallinity ( Yao et al, 2021 ). However, both mechanisms could occur in semicrystalline polymers such as PE ( Fu et al, 2021 , Yao et al, 2021 ). For instance, carbonaceous by-products derived from masks (namely, microfibers) have shown a high affinity for crystal violet and methylene blue in controlled studies, thus acting as dye carriers ( Anastopoulos and Pashalidis, 2021 ).…”

Sorption of Pollutants on Microplastics

“…Adsorption kinetic mechanisms of pollutants on MPs have been reported by Li and collaborators (Li et al 2021). Fu et al (2021) summarized kinetics isotherm models and mechanisms of adsorption of organic pollutants on MPs.…”

“…In cases that only trace amounts were leached into distilled water, seawater, and acidic pepsin solution, over 20 times as much component was leached into stomach oil by day 15, and over 50 times as much into fish oil (a major component of stomach oil) by day 2 (Tanaka et al 2015). Fu et al (2021) summarized studies on kinetics and isotherms models in the adsorption of organic pollutants on MPs from 2018 to 2021. These models estimated the efficacy of the adsorption of pollutants and reported their possible mechanisms during the adsorption of the compounds.…”

“…The previous studies showed that organic toxic compounds can be adsorbed onto the MP surfaces through hydrophobic, electrostatic, and noncovalent interactions (Fu et al 2021). The comparison of adsorption of hydrophilic organic pollutant between pristine and artificially aged MPs was investigated, and the main factors were hydrogen bonding and electrostatic mechanisms (Liu et al 2019).…”