Figure 3.

Sorption of all-trans-retinoic acid, aminocaproic acid, betaine, deoxyadenosin, and thymine on microplastics. The sorption kinetics of them (a) on black polyethylene film microplastics (PE_black-film), white polyethylene film microplastics (PE_white-film), and pure polyethylene microplastic granules (PE_pure-granule) in water and the sorption efficiency of them onto microplastics under different treatment conditions (b). The color order of each microplastic treatment in (b) represents the sorption on microplastics in water (light) and the sorption on bovine serum albumin-coated microplastics in water (dark) (***p ≤ 0.001, **p ≤ 0.01, and *p ≤ 0.05). Raw data can be found in Table S5.