晶体形态对纳米二氧化钛对盐卤虫的吸收、颗粒溶解和毒性的评估。

Martha Johnson, Mehmet Ates, Zikri Arslan, Ibrahim Farah, Coneliu Bogatu
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引用次数: 10

摘要

了解纳米材料的毒性对于避免对人类和环境健康产生不利影响至关重要。本研究考察了晶体形态对纳米TiO2(n-TiO2)物理化学性能和毒性的影响。盐卤虫暴露于海水中的锐钛矿、金红石和n-TiO2的混合多晶型物中。在存在和不存在食物的情况下,在n-TiO2的1、10和100mg/L悬浮液中进行短期(24小时)和长期(96小时)暴露。锐钛矿型积累量最大,其次是混合型和金红石型。食物的存在大大减少了积累。n-TiO2在海水中的溶解不显著(p混合物>金红石。死亡率和氧化应激水平随着n-TiO2浓度和暴露时间的增加而增加(长期暴露下的pn-TiO2。
本文章由计算机程序翻译,如有差异,请以英文原文为准。

Assessment of Crystal Morphology on Uptake, Particle Dissolution, and Toxicity of Nanoscale Titanium Dioxide on <i>Artemia salina</i>.

Assessment of Crystal Morphology on Uptake, Particle Dissolution, and Toxicity of Nanoscale Titanium Dioxide on <i>Artemia salina</i>.

Assessment of Crystal Morphology on Uptake, Particle Dissolution, and Toxicity of Nanoscale Titanium Dioxide on Artemia salina.

Knowledge of nanomaterial toxicity is critical to avoid adverse effects on human and environment health. In this study, the influences of crystal morphology on physico-chemical and toxic properties of nanoscale TiO2 (n-TiO2) were investigated. Artemia salina were exposed to anatase, rutile and mixture polymorphs of n-TiO2 in seawater. Short-term (24 h) and long-term (96 h) exposures were conducted in 1, 10 and 100 mg/L suspensions of n-TiO2 in the presence and absence of food. Anatase form had highest accumulation followed by mixture and rutile. Presence of food greatly reduced accumulation. n-TiO2 dissolution was not significant in seawater (p<0.05) nor was influenced from crystal structure. Highest toxic effects occurred in 96h exposure in the order of anatase > mixture > rutile. Mortality and oxidative stress levels increased with increasing n-TiO2 concentration and exposure time (p<0.05). Presence of food in the exposure medium alleviated the oxidative stress, indicating that deprivation from food could promote toxic effects of n-TiO2 under long-term exposure.

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