College of Environmental Science and Engineering, Tianjin Key Laboratory of Environmental Remediation and Pollution Control, Key Laboratory of Pollution Processes and Environmental Criteria, Ministry of Education, Nankai University, Tianjin, 300071, PR China.
College of Marine Science of Engineering, Tianjin Key Laboratory of Marine Resources and Chemistry, Tianjin University of Science and Technology, Tianjin, 300457, PR China.
Environ Pollut. 2015 Nov;206:644-51. doi: 10.1016/j.envpol.2015.08.032. Epub 2015 Aug 28.
Zebrafish were placed in the upper layer of aquariums to investigate the impacts of anatase and rutile nano-TiO2 on perfluorooctanesulfonate (PFOS) bioaccumulation in zebrafish. Both variations of particle hydrodynamic size and concentration in water column suggest that anatase was better dispersed than rutile. PFOS could be significantly adsorbed on nano-TiO2 to form TiO2-PFOS complexes, leading to reduced concentration of PFOS in upper layer. Due to enhanced exposure to PFOS by ingestion and adhesion of TiO2-PFOS complexes, the whole-body PFOS concentration in zebrafish was enhanced by 59.0% (95% CI: 55.9%, 61.9%) and 25.4% (95% CI: 24.8%, 25.6%) in the presence of anatase and rutile nano-TiO2 after equilibrium compared with the control with PFOS alone. The bioaccumulation of PFOS was much more promoted by anatase, which was attributed by greater adsorption capacity of PFOS to anatase, slower migration of their complex in water column, and slower elimination rate of anatase from fish.
斑马鱼被放置在水族箱的上层，以研究锐钛矿型和金红石型纳米 TiO2 对全氟辛烷磺酸（PFOS）在斑马鱼体内生物累积的影响。水相中的两种颗粒水动力粒径和浓度变化表明，锐钛矿型纳米 TiO2 的分散性优于金红石型纳米 TiO2。PFOS 可被显著吸附到纳米 TiO2 上形成 TiO2-PFOS 复合物，导致上层中 PFOS 的浓度降低。由于摄入和粘附 TiO2-PFOS 复合物而增强了对 PFOS 的暴露，与单独含有 PFOS 的对照组相比，在平衡状态下，存在锐钛矿型和金红石型纳米 TiO2 时，斑马鱼体内的全身体内 PFOS 浓度分别增加了 59.0%（95%置信区间：55.9%，61.9%）和 25.4%（95%置信区间：24.8%，25.6%）。PFOS 的生物累积被锐钛矿型纳米 TiO2 大大促进，这归因于锐钛矿型纳米 TiO2 对 PFOS 的吸附能力更强，其复合物在水相中迁移速度更慢，以及从鱼体内消除锐钛矿型纳米 TiO2 的速度更慢。
