Enhanced bioaccumulation of cadmium in carp in the presence of titanium dioxide nanoparticles.
Enhanced bioaccumulation of cadmium in carp in the presence of titanium dioxide nanoparticles.
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DOI：
10.1016/j.chemosphere.2006.09.003
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发表时间：
2007-02
期刊：
影响因子：
8.8
通讯作者：
Xuezhi Zhang;Hongwen Sun;Zhiyan Zhang;Q. Niu;Yongsheng Chen;J. Crittenden
中科院分区：
文献类型：
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作者：
Xuezhi Zhang;Hongwen Sun;Zhiyan Zhang;Q. Niu;Yongsheng Chen;J. Crittenden
本文研究了纳米二氧化钛和天然沉积物颗粒(SP)对Cd的吸附作用，并通过生物富集试验评价了纳米颗粒和SP对Cd在鲤鱼体内的迁移作用。结果表明，纳米TiO2对Cd的吸附能力明显强于SP。在暴露25d期间，SP的存在对鲤鱼体内Cd的积累没有显著影响。然而，纳米二氧化钛的存在极大地促进了镉在鲤鱼体内的积累。暴露25d后，鲤鱼体内Cd含量增加了146%，分别为22.3和9.07μg/g。Cd与二氧化钛浓度呈正相关。在内脏和鳃中积累了大量的Cd和TiO2。
In this study adsorption of Cd onto TiO2nanoparticles and natural sediment particles (SP) were studied and the facilitated transports of Cd into carp by TiO2nanoparticles and SP were assessed by bioaccumulation tests exposing carp (Cyprinus carpio) to Cd contaminated water in the presence of TiO2and SP respectively. The results show that TiO2nanoparticles had a significantly stronger adsorption capacity for Cd than SP. The presence of SP did not have significant influence on the accumulation of Cd in carp during the 25d of exposure. However, the presence of TiO2nanoparticles greatly enhanced the accumulation of Cd in carp. After 25d of exposure Cd concentration in carp increased by 146%, and the value was 22.3 and 9.07μg/g, respectively. And there is a positive correlation between Cd and TiO2concentration. Considerable Cd and TiO2accumulated in viscera and gills of the fish.