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| Arsenite enhance the stability of nano-TiO2 in aquatic culture media for freshwater algae and daphnia |
| Received:August 11, 2016 |
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| KeyWord:nTiO2;arsenite;stability |
| Author Name | Affiliation | E-mail | | LI Jin-li | Faculty of Environmental Science and Engineering, Kunming University of Science and Technology, Kunming 650500, China
Key Laboratory of Urban Environment and Health, Institute of Urban Environment, Chinese Academy of Sciences, Xiamen 361021, China | | | LI Meng-ting | Key Laboratory of Urban Environment and Health, Institute of Urban Environment, Chinese Academy of Sciences, Xiamen 361021, China | | | HUANG Bing | Faculty of Environmental Science and Engineering, Kunming University of Science and Technology, Kunming 650500, China | | | WANG Zhen-hong | Key Laboratory of Urban Environment and Health, Institute of Urban Environment, Chinese Academy of Sciences, Xiamen 361021, China | | | LUO Zhuan-xi | Key Laboratory of Urban Environment and Health, Institute of Urban Environment, Chinese Academy of Sciences, Xiamen 361021, China | zxluoire@163.com |
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| Abstract: |
| Nano-titanium dioxide(nTiO2) has an impact on the behavior of other co-contaminants in the environment, then pose to its ecological risk. To better understand and then to predict the ecological risk of nTiO2 in fresh water, we investigated the stability of nTiO2 under arsenite[As(Ⅲ)] stress in different culture media-ultrapure water, Freshwater Algae and Daphnia Culture Media BG11 and SM7. The results showed that:The stability of nTiO2 significantly negatively related with its initial concentration and ion strength of the disperse medium; Arsenite could influence the pH and Zeta-potential of the medium, thus the stability of nTiO2; The stability significantly positively related with arsenite's concentration, indicating enhanced stability and migration of nTiO2 by arsenite. As a result algae and daphnia were fully exposed to the stable nTiO2-As(Ⅲ) system, and the ecological risk of both spieces increased. |
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