title: Facilitated bioaccumulation of perfluorooctanesulfonate in zebrafish by nano-TiO2 in two crystalline phases.
abstract: 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.
authors: 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.
authors: Liwen
authors: L
authors: Qiang
authors: 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.
authors: Xiaomei
authors: X
authors: Shi
authors: College of Marine Science of Engineering, Tianjin Key Laboratory of Marine Resources and Chemistry, Tianjin University of Science and Technology, Tianjin, 300457, PR China.
authors: Xiaoyu
authors: X
authors: Pan
authors: 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. Electronic address: zhuly@nankai.edu.cn.
authors: Lingyan
authors: L
authors: Zhu
authors: 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.
authors: Meng
authors: M
authors: Chen
authors: 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.
authors: Yuwei
authors: Y
authors: Han
mesh_terms: D000327:Adsorption; D017738:Alkanesulfonic Acids / Q000032:analysis* / Q000493:pharmacokinetics; D000818:Animals; D003460:Crystallization; D005466:Fluorocarbons / Q000032:analysis* / Q000493:pharmacokinetics; D053758:Nanoparticles / Q000737:chemistry*; D010316:Particle Size; D014025:Titanium / Q000737:chemistry*; D014874:Water Pollutants, Chemical / Q000032:analysis* / Q000493:pharmacokinetics; D015027:Zebrafish / Q000378:metabolism*
chemical_list: D017738:Alkanesulfonic Acids; D005466:Fluorocarbons; D014874:Water Pollutants, Chemical; C009495:titanium dioxide; C076994:perfluorooctane sulfonic acid; D014025:Titanium
keywords: Anatase nano-TiO(2); Bioaccumulation; PFOS; Rutile nano-TiO(2); Zebrafish