海洋多孔介质中微塑料和富勒烯的共迁移

A simulated one-dimensional column system was established with seawater and natural sea sand to investigate the cotransport of 1μm polystyrene microplastics (PS) and fullerene (C₆₀) in seawater-saturated marine media. The results showed that, in single suspension, the mass percentage recovered from the effluent (M_eff) and maximum effluent concentration (MEC) of the well-dispersed PS (15mg/L) were 36.8%, and 0.42, respectively, while the aggregation (agglomeration) of C₆₀ at 15mg/L was obviously presented with 16.8% of M_eff and 0.22 of MEC, respectively. When 15mg/L PS and 15mg/L C₆₀ were coexisted, PS might form stable co-aggregates with part of C₆₀ thereby promote the transport of C₆₀. Conversely, C₆₀ inhibited the transport of PS. If the concentration of PS in binary suspension increased from 15mg/L to 45mg/L, the enhancing effect of PS on transport of C₆₀ was eventually transformed into the inhibition of C₆₀ transport, which was mainly due to the increase in the volume and number of PS-C₆₀ co-aggregates.