将纯纳米二氧化钛和铈掺杂纳米二氧化钛(Ce/TiO2)以及硅藻土(KL)负载型铈掺杂二氧化钛(Ce-TiO2/KL)三种光催化材料分别给大鼠28天长期灌胃染毒,用电感耦合等离子体-原子发射光谱仪(ICP-AES)定量分析其在大鼠体内重要器官中分布及代谢情况,并进行病理组织学检查.结果表明,三组大鼠各组织器官中二氧化钛的积累量顺序:肺＞心脏＞肝脏＞子宫和卵巢＞肾脏＞睾丸＞脾脏＞脑,纯二氧化钛主要在肺脏中积累的最多,在脑中积累的最少.三组大鼠肺脏均有炎性细胞产生;而铈掺杂Ce/TiO2组大鼠肾脏和硅藻土负载型Ce-TiO2/KL组大鼠的心脏也有少量炎性细胞,其他组织未见明显的形态学改变.表明3种光催化材料长期染毒对大鼠各脏器均有蓄积,但未造成严重中毒和死亡,毒副风险较低,有较好应用前景.
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