海洋多孔介质中微塑料和富勒烯的共迁移

采用海水和天然海砂，模拟构建了一维柱状的海洋多孔介质体系，研究了粒径1μm的聚苯乙烯微塑料（PS）与富勒烯（C₆₀）在海水饱和砂柱中的共迁移行为.结果发现：单体系下，15mg/L PS的穿透率（M_eff）和最大穿透浓度（MEC）可分别达到36.8%和0.42；而15mg/L的C₆₀团聚明显，其M_eff和MEC值仅分别为16.8%和0.22.当15mg/L PS与15mg/L C₆₀ 1：1共存时，PS能与部分C₆₀形成稳定共团聚体，促进C₆₀迁移；但反之C₆₀却抑制了PS迁移.如果将双体系下PS的浓度由15mg/L增至45mg/L，PS对C₆₀的迁移促进则转变为迁移抑制，这主要源于PS-C₆₀共团聚体体积的增大和数量的增加.

Cotransport of microplastics and fullerene in marine porous media

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.