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首页> 外文期刊>Environmental research >Toxicity and trophic transfer of P25 TiO_2 NPs from Dunaliella salina to Anemia salina: Effect of dietary and waterborne exposure
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Toxicity and trophic transfer of P25 TiO_2 NPs from Dunaliella salina to Anemia salina: Effect of dietary and waterborne exposure

机译：P25 TiO_2 NPs从杜氏盐藻到贫血盐藻的毒性和营养转移：饮食和水暴露的影响

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The recent increase in nanoparticle (P25 TiO_2 NPs) usage has led to concerns regarding their potential implications on environment and human health. The food chain is the central pathway for nanoparticle transfer from lower to high trophic level organisms. The current study relies on the investigation of toxicity and trophic transfer potential of TiO_2 NPs from marine algae Dunaliella salina to marine crustacean Artemia salina. Toxicity was measured in two different modes of exposure such as waterborne (exposure of TiO_2 NPs to Artemia) and dietary exposure (NP-accumulated algal cells are used to feed the Artemia). The toxicity and accumulation of TiO_2 NPs in marine algae D. salina were also studied. Artemia was found to be more sensitive to TiO_2 NPs (48 h LC_(50) of 4.21 mg L~(-1)) as compared to marine algae, D. salina (48 h LC_(50) of 11.35 mg L~(-1)). The toxicity, uptake, and accumulation of TiO_2 NPs were observed to be more in waterborne exposure as compared to dietary exposure. Waterborne exposure seemed to cause higher ROS production and antioxidant enzyme (SOD and CAT) activity as compared to dietary exposure of TiO_2 NPs in Artemia. There were no observed biomagmfication (BMF) and trophic transfer from algae to Artemia through dietary exposure. Histopathological studies confirmed the morphological and internal damages in Artemia. This study reiterates the possible effects of the different modes of exposure on trophic transfer potential of TiO_2 NPs and eventually the consequences on aquatic environment.
机译：纳米粒子（P25 TiO_2 NPs）的使用最近增加，引起了人们对其对环境和人类健康的潜在影响的担忧。食物链是纳米颗粒从低营养级生物转移到高营养级生物的主要途径。目前的研究依赖于从海藻杜氏盐藻到海产甲壳类卤虫的毒性和营养传递潜力的TiO_2 NPs的调查。在两种不同的暴露方式下测量了毒性，如水传播（TiO_2 NPs暴露于卤虫）和饮食接触（NP积累的藻类细胞用于喂养卤虫）。还研究了TiO_2 NPs在海藻盐藻中的毒性和积累。与盐水藻D. salina（48 h LC_（50）为11.35 mg L〜（-）相比，卤虫对TiO_2 NPs（48 h LC_（50）为4.21 mg L〜（-1））更敏感。 1））。与饮食接触相比，在水接触中，TiO_2 NPs的毒性，摄取和积累更大。与卤虫中饮食中的TiO_2 NPs的饮食暴露相比，水源性暴露似乎引起更高的ROS产生和抗氧化酶（SOD和CAT）活性。没有观察到生物放大作用（BMF）和通过饮食接触从藻类向卤虫的营养转移。组织病理学研究证实了卤虫的形态和内部损害。这项研究重申了不同暴露方式对TiO_2 NPs营养传递潜力的可能影响，并最终对水生环境造成了影响。

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