Facilitated bioaccumulation of perfluorooctanesulfonate in zebrafish by nano-TiO2 in two crystalline phases.
Facilitated bioaccumulation of perfluorooctanesulfonate in zebrafish by nano-TiO2 in two crystalline phases.
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DOI：
10.1016/j.envpol.2015.08.032
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发表时间：
2015-11
影响因子：
8.9
通讯作者：
Liwen Qiang;Xiao-Qiong Shi;Xiaoyu Pan;Lingyan Zhu;Meng Chen;Yuwei Han
中科院分区：
文献类型：
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作者：
Liwen Qiang;Xiao-Qiong Shi;Xiaoyu Pan;Lingyan Zhu;Meng Chen;Yuwei Han
将斑马鱼置于水族箱上层，研究金红石型和金红石型纳米TiO 2对全氟辛烷磺酸（PFOS）在斑马鱼体内富集的影响。颗粒的流体动力学尺寸和在水柱中的浓度的变化表明，金红石比金红石更好地分散。PFOS在纳米TiO 2上的吸附量较大，形成TiO 2-PFOS复合物，降低了上层PFOS的浓度。由于摄食和TiO 2-PFOS复合物的粘附增强了对PFOS的暴露，平衡后，添加金红石型和金红石型纳米TiO 2的斑马鱼体内PFOS浓度比单独添加PFOS的对照组分别增加了59.0%（95%CI：55.9%，61.9%）和25.4%（95%CI：24.8%，25.6%）。PFOS在水体中的富集作用更强，这是由于PFOS对PFOS的吸附能力更强，其复合物在水体中的迁移速度更慢，以及PFOS在鱼类体内的消除速度更慢。
Zebrafish were placed in the upper layer of aquariums to investigate the impacts of anatase and rutile nano-TiO2on 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-TiO2to 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-TiO2after 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.